Entries |
Document | Title | Date |
20080203853 | Method For Producing a Monolithic Piezo Actuator With Stack Elements, Monilithic Piezo Actuator With Stack Elements, and Use of the Piezo Actuator - A piezo actuator has a stack element and at least one further stack element, wherein each of the stack elements has stacked piezoceramic layers and electrode layers arranged between the piezoceramic layers, each of the electrode layers extends to at least one of at least two lateral surface sections of the stack element which have external metallizations on them, and are connected to the electrode layers such that adjacently stacked electrode layers can have different electrical potentials applied to them indirectly via the external metallizations, the stack elements are arranged above one another to form a monolithic total stack, and connected to one another by at least one connecting layer. The following steps are provided: a) provision of the total stack and b) production of a load-relieving crack in the connecting layer. An electrical connector in the form of a wire can be fitted on the relevant external metallization regions. | 08-28-2008 |
20080211350 | PIEZOELECTRIC RESONATOR ELEMENT AND PIEZOELECTRIC DEVICE - A piezoelectric resonator element includes: a base in a predetermined length, the base being made of a piezoelectric material; a plurality of resonating arms extending from a first end of the base; a joining part connected to a second end apart from the first end of the base by a predetermined distance; a connecting part connected to the joining part and extending in a width direction of the piezoelectric resonator element; a supporting arm connected to the connecting part and extending in a same direction as the resonating arm at an outer side of the plurality of resonating arms. A ratio L | 09-04-2008 |
20080211351 | Micromotion mechanism having ultrasonic motor and oscillation element holding mechanism - A micromotion mechanism having an ultrasonic motor includes: a fixing base; a moving element supported to be movable in the moving axis direction with respect to the fixing base; an oscillation element having a rectangular geometry including a first plane parallel to the moving axis direction and provided with a plurality of projections and a second plane parallel to the first plane for exciting a plurality of oscillation modes by applying a high frequency voltage signal, and a holding mechanism for holding the oscillation element with respect to the fixing base. The holding mechanism is fixed to a part of the second plane of the oscillation element, and is incorporated with a high rigidity material not including high nonlinearity elements including at least one of a friction sliding unit and a rubber member. | 09-04-2008 |
20080218028 | Piezoceramic Multilayer Actuator and Method of Manufacturing a Piezoceramic Multilayer Actuator - In a method of manufacturing a piezoceramic multilayer actuator ( | 09-11-2008 |
20080218029 | PIEZOCERAMIC MULTILAYER ACTUATOR AND METHOD OF MANUFACTURING A PIEZOCERAMIC MULTILAYER ACTUATOR - A piezoceramic multilayer actuator ( | 09-11-2008 |
20080231143 | PIEZOELECTRIC MOVEMENT DEVICE - The invention relates to a piezoelectric movement device, in particular a motor, with a piezoelectric apparatus, which has a middle area and two end areas, and with a movement body, which is mounted on or in a mount or the piezoelectric apparatus, wherein one end area is designed or both end areas are designed to exert a force in the direction of the movement body, in particular diagonally and axially or transversely of the axis to a longitudinal axis of the piezoelectric apparatus, on the movement body. The invention is characterized in that the middle area is a piezoelectric body and the end areas each comprise at least two piezoelectric bodies, which are connected with each other, in particular via contact surfaces. | 09-25-2008 |
20080238256 | Dual direction rake piezo actuator - Methods and apparatus relating to use and/or provision of a rake piezo actuator are described. In one embodiment, a piezo patch may be coupled to a plurality of blades (e.g., to cause the blades to oscillate and provide air flow between fins of one or more heat sinks). Other embodiments are also described. | 10-02-2008 |
20080238257 | MEMS DEVICE AND PORTABLE COMMUNICATION TERMINAL WITH SAID MEMS DEVICE - It is made possible to provide a MEMS device that has a low operation voltage, a large contact pressure force, and a large separation force. A MEMS device includes: a substrate; a supporting unit that is provided on the substrate; a fixed electrode that is provided on the substrate; an actuator that includes a first electrode, a first piezoelectric film formed on the first electrode, and a second electrode formed on the first piezoelectric film, one end of the actuator being fixed onto the substrate with the supporting unit, the actuator extending in a direction connecting the supporting unit and the fixed electrode, the first electrode being located to face the fixed electrode; and a stopper unit that is located above a straight line connecting the supporting unit and the fixed electrode, and is located on the substrate so as to face the first electrode. | 10-02-2008 |
20080238258 | Actuator - To provide an actuator which is easily made a small size and flexible, and has a large displacement. The actuator comprises a rod-shaped actuator element, having one axial end thereof fixed, including a dielectric film made of a dielectric elastomer and a plurality of electrodes arranged via the dielectric film, in the actuator element, the dielectric film extends as a voltage applied across the electrodes becomes large, and a load member connected to the other axial end of the actuator element and fixed in a state in which the actuator element is permitted to be extended axially, characterized in that making large the voltage applied across the electrodes causes the dielectric film to be extended, whereby the actuator element is extended axially according to the tension of the load member. | 10-02-2008 |
20080246370 | Actuator for the Drive Train of a Motor Vehicle - An actuator for the drive train of a motor vehicle for the automation of a manual gearbox. The invention is characterized in that the actuator is produced from an electrostrictive material. | 10-09-2008 |
20080258578 | Driving device capable of obtaining a stable frequency characteristic - A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a static member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion coupled to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. The driving device is covered with a cabinet. An elastic member lies between the cabinet and the static member. | 10-23-2008 |
20080258579 | Driving device capable of reducing height thereof - A driving device includes an electro-mechanical transducer having first and second end portions opposite to each other in an expansion/contraction direction, a stationary member coupled to the first end portion of the electro-mechanical transducer, a vibration friction portion mounted to the second end portion of the electro-mechanical transducer, and a rod-shaped moving portion frictionally coupled to the vibration friction portion, whereby moving the moving portion in the expansion/contraction direction of the electro-mechanical transducer. A frictionally coupled portion has a height (a length of the vibration friction portion in a sliding direction in contact with the moving portion) which is not more than 1.15 mm. | 10-23-2008 |
20080265715 | Method and Device for Polarizing a Piezoelectric Actuator - In a method and device for polarizing a piezoelectric actuator according to which high-frequency pulse voltages can be used for polarizing the actuators an actuator to be polarized is mounted between two retaining elements while connected in series to a second piezoelectric actuator. The retaining elements provide the actuator ( | 10-30-2008 |
20080278034 | Driving device - In order to provide a driving device that can be made more compact and shorter in height, a driving mechanism of a driving device according to the present invention includes: a flex movement member | 11-13-2008 |
20080297003 | Ultrasonic Motor - An ultrasonic motor includes a stator that includes a comb body with a plurality of circumferentially-arranged comb-like projections and a piezoelectric body integrally mounted on the comb body, a rotor rotatable with respect to the stator, the rotor having a contact surface that establishes pressure contact with the stator, and a resin film formed with predetermined hardness on the contact surface of the rotor, the resin film containing a solid lubricant. | 12-04-2008 |
20080303382 | DEVICE AND METHOD FOR PROVIDING STRAIN MEASUREMENTS OF INSULATED PIPES - This disclosure provides methods and apparatuses to monitor strain in a steel pipe with reduced or eliminated disruption of the insulative and anti-corrosive layers or coatings that cover the pipe. The methods and apparatuses can include an attachment scheme that is less intrusive and less sensitive to dilation of the insulation layer on the pipe than previous strain monitoring solutions. Additionally, methods and apparatuses can reduce corrosion by virtue of the reduction in the number and volume of metallic components. | 12-11-2008 |
20080309197 | Piezoelectric Actuator Having a Self-Centering Plug-In Connection - The invention relates to a piezoelectric actuator used as a piezoelectric injector, comprising a holding body provided with an inner region, an upper part and a lower part, and a piezoelectric element which is arranged in the inner region against the upper part of the holding body and includes a plurality of piezoelectric layers arranged in the form of a stack, The piezoelectric element can be electrically contacted through the holding body. The upper part of the holding body has at least one connection for electrically contacting the piezoelectric element, and at least one connection and flow channels for feeding the inner chamber with a fluid that can be metered by means of a regulating element containing the piezoelectric element. An electrical plug-in connection is arranged between the piezoelectric element and the upper part of the holding body, which includes a mechanical plug-in connection being arranged between the holding body upper part and the piezoelectric element. | 12-18-2008 |
20080315722 | NON-LINEAR PIEZOELECTRIC MECHANICAL-TO-ELECTRICAL GENERATOR SYSTEM AND METHOD - A non-linear power generator system that may include a flexible beam for receiving a mechanical input, the flexible beam being supported in a bowed configuration; an electrically responsive member supported adjacent one end of the flexible beam so as to be under a compressive force exerted by the flexible beam; and the flexible beam being adapted to move towards a flattened shape from the bowed shape in response to the mechanical input, to transmit the mechanical input to the electrically responsive member, to cause a compression of the electrically responsive member that results in an electrical output signal being generated by the electrically responsive member. | 12-25-2008 |
20090015102 | METHOD OF POLING PIEZOELECTRIC ACTUATOR - A method of poling a piezoelectric actuator, which can improve the uniformity of a plurality of piezoelectric actuators. In the method, a plurality of piezoelectric actuators are prepared for poling. Then, at least two preliminary poling processes are performed on the prepared piezoelectric actuators under different preliminary voltages and displacements of the piezoelectric actuators subjected to each of the at least two poling processes are measured. A relationship between a voltage and a displacement for each of the piezoelectric actuators is established. Poling voltages are calculated so that the piezoelectric actuators can have the same target displacement. Formal poling is performed on the piezoelectric actuators under the calculated poling voltages. The displacements of the piezoelectric actuators, which have completed the formal poling, are measured. | 01-15-2009 |
20090015103 | Novel electrical generators for use in unmoored buoys and the like platforms with low-frequency and time-varying oscillatory motions - A buoy for generating electrical energy from an upward heave resulting from a passing wave is provided. The buoy including: a body; a first device associated with the body to which a motion of the heave is transferred; and a second device associated with the body to which the motion is intermittently transferred from the first device. A buoy is also provided for generating electrical energy from a pitch/roll resulting from the passing wave where the first device is associated with the body to which a motion of the pitch/roll is transferred and the second device is associated with the body to which the motion is intermittently transferred from the first device. | 01-15-2009 |
20090026885 | ACTUATING DEVICE, FABRICATING METHOD THEREOF, AND MODULE VARIATION CONTROL DEVICE USING THE ACTUATING DEVICE - An actuating device is provided, which includes a deformable membrane, walls formed on the membrane to define cavities, rods formed within the cavities, and on the surface of the membrane on one side with reference to a cavity center, to move in association with the deformation of the membrane, and an actuating unit formed on a lower side of the membrane to be piezoelectrically driven to deform the membrane. The actuating device is applicable to miniaturized electronic devices and can actuate the function modules appropriately. | 01-29-2009 |
20090026886 | Drive Apparatus - Provided is a self-propelled drive apparatus that enables stable drive and low cost, the apparatus includes: a movable member which has an electromechanical transducer whose one end is fixed to the movable member and the other end is fixed to a drive friction member, which is movably supported by the movable member movably in the first direction, which represents a extension-contraction direction A-B of the electromechanical transducer, where the movable member is supported movably in the first direction; a pair of plate springs which extend in a belt shape in the first direction and sandwich the drive friction member; a base member holding the plate springs in a cantilever manner in the direction of the short sides of the plate springs; and auxiliary springs disposed on the outside of the plate springs to apply elastic force only to both ends of each of the plate springs. | 01-29-2009 |
20090051250 | Mesh Terminals For Piezoelectric Elements - The present invention provides systems and methods for connecting a coaxial cable or other conductor to an acoustic element, e.g., piezoelectric element, that withstand stress, e.g., due to vibrations of the piezoelectric element. In an embodiment, mesh terminals are bonded to the top and bottom of an piezoelectric element by conductive epoxy. Each mesh terminal has a mesh pattern comprising one or more openings through which the conductive epoxy flows and contacts the piezoelectric element thereby proving additional bonding areas for the epoxy to secure the mesh terminal to the piezoelectric element. This results in a stronger bond between the mesh terminal and the piezoelectric element. A coaxial cable or other conductor is connected to the piezoelectric element via the mesh terminal. The mesh terminal includes a stress relief element that reduces the amount of stress at a joint where the mesh terminal connects to the coaxial cable. | 02-26-2009 |
20090072667 | PIEZOELECTRIC/ELECTROSTRICTIVE FILM ELEMENT - A piezoelectric/electrostrictive film element | 03-19-2009 |
20090085438 | PIEZOELECTRIC FAN, COOLING DEVICE CONTAINING SAME, AND METHOD OF COOLING A MICROELECTRONIC DEVICE USING SAME - A piezoelectric fan includes a piezoelectric actuator patch ( | 04-02-2009 |
20090096324 | PIEZOACTUATOR, METHOD FOR PRODUCING A PIEZOACTUATOR AND INJECTION SYSTEM OF SAID PIEZOACTUATOR - A piezoactuator for injecting fuel with a predetermined fuel pressure has an at least laterally narrowing casing around the internal space of the actuator which has a first temperature- and/or pressure-dependent volume change, a piezo stack located in the internal space which has a second temperature- and/or pressure-dependent volume change, a transmission element which is located between the piezo stack and the casing for transmitting the fuel pressure on the outside of the casing onto the piezo stack, wherein the transmission element has a passivating liquid which has a third temperature- and/or pressure-dependent volume change as well as several preformed bodies which have a fourth temperature- and/or pressure-dependent volume change; wherein the relation between the passivating liquid and the preformed bodies is set that the first volume change of the casing basically corresponds to an overall internal space volume change which has at least the second, third, and fourth volume change. | 04-16-2009 |
20090102320 | PIEZOACTUATOR - A piezoactuator includes a piezoelement of a multilayer construction of piezolayers, with internal electrodes arranged between the piezolayers alternately having a differing polarity of an electrical voltage applied to them. An actuator base and an actuator head and an insulation medium surrounding at least the piezolayers of the piezoelement are present. The surface of the piezoelement is provided with a first electrical insulation layer. The piezoactuator has at least one layer of a metallic film wound around it at least in the region of the piezoelement. A layer of a plastic is applied to the film and in a manner overlying the connecting locations with respect to the actuator head and with respect to the actuator base. | 04-23-2009 |
20090115289 | Resonator Capable of Varying Its Resonance Frequency and Method for Varying Its Resonance Frequency - The present invention provides a resonator capable of varying its resonance frequency of good performance with a low dispersion at a high manufacturing yield and a low cost. The resonator comprises a fixed electrode | 05-07-2009 |
20090121587 | ENERGY SHUTTLE BASED HIGH ENERGY PIEZOELECTRIC APPARATUS AND METHOD - An energy harvester apparatus that includes a piezoelectric beam having opposing first and second ends, with the first end being fixedly supported to a support structure. A negative spring force subsystem has a first end fixedly secured against movement, and a second end secured to the second end of said piezoelectric beam. The negative spring force subsystem includes a linkage system and a biasing element operably associated with the linkage system for applying an adjustable, negative spring force to the piezoelectric beam to soften the piezoelectric beam. The negative spring force subsystem is adjusted to flex the beam sufficiently to overcome the inherent stiffness of the beam such that two stable positions for the beam are created. The beam is therefore able to oscillate between the two stable positions in an over center fashion in response to a low magnitude vibration signal. In various embodiments the system is implemented to provide an input drive signal to control various types of external devices. | 05-14-2009 |
20090127979 | Actuator - An actuator includes a spirally rolled cylindrical sheet body. The sheet body is formed by attaching an electrode on each side of a dielectric elastomer layer. When a voltage is applied to the electrodes, the sheet body is contracted along the direction of its thickness, and expanded in directions perpendicular to its thickness. The actuator is actuated by applying a voltage to the electrodes and stopping the voltage application, so that the cylindrical sheet body is extended and contracted along the direction of the axis. The material forming the dielectric elastomer layer has a low strain region, where the value of a strain based on a stress acting on the dielectric elastomer layer varies from zero to a value that is greater than and close to zero, and a high strain region, where the value of the strain is greater than that in the low strain region. The Young's modulus in the low strain region is less than the Young's modulus in the high strain region. | 05-21-2009 |
20090167113 | Positioner device - A positioner ( | 07-02-2009 |
20090206700 | Piezo actuator with a plug connection - A piezo actuator in the form of a piezo injector, includes a holding body having an inner space, and having a piezo element disposed in an inner space and encompassing multiple piezoelectric plies disposed to form a stack, which element is electrically contactable through the holding body. The holding body has one or more connectors for electrical contacting of the piezo element, as well as one or more connectors and flow conduits for delivering into the inner space a fluid that can be metered by way of an adjusting member encompassing the piezo element, such that in the piezo actuator, the flow conduit connecting the inner space and the connector for the fluid is offset radially outward with respect to the electrical conductors leading through the holding body and substantially constituting the electrical contact system, and is disposed to extend substantially parallel to said conductors; and a plug connection connecting the piezo element to the electrical conductors is disposed between the holding body and piezo element. | 08-20-2009 |
20090206701 | CLIP - A clip for securing a sleeve to the body of a piezoelectric actuator in an actuator assembly, the clip taking the form of a band comprising first and second axially spaced ring-like members joined by a plurality of inwardly facing substantially arch shaped sections, the arch shaped sections defining the minimum inner diameter of the band, whereby axial displacement of the ring-like members way from one another causes flexing of the arch shaped sections to increase the minimum inner diameter of the band while axial displacement of the ring-like members towards one another causes flexing of the arch shaped sections to reduce the minimum inner diameter of the band thereby, when in use, to increase a clamping force applied to the sleeve. | 08-20-2009 |
20090212664 | MICRO MOVABLE DEVICE AND METHOD OF MAKING THE SAME USING WET ETCHING - A micro movable device includes a base substrate, a fixed portion bonded to the base substrate, a movable portion having a fixed end connected to the fixed portion and extending along the base substrate, and a piezoelectric drive provided on the movable portion and the fixed portion on a side opposite to the base substrate. The piezoelectric drive has a laminate structure provided by a first electrode film contacting the movable portion and the fixed portion, a second electrode film and a piezoelectric film between the first and the second electrode films. At least one of the movable portion and the fixed portion is provided with a groove extending along the piezoelectric drive. | 08-27-2009 |
20090230819 | COMPACT RAKE PIEZOELECTRIC ASSEMBLY AND METHOD OF MANUFACTURING SAME - A compact rake piezoelectric assembly comprises a body ( | 09-17-2009 |
20100045141 | LARGE FORCE AND DISPLACEMENT PIEZOELECTRIC MEMS LATERAL ACTUATION - A piezoelectric microelectromechanical systems (MEMS) actuator includes a silicon substrate; an actuator beam comprising a first end region connected to the silicon substrate and a second end region connected to a mechanically compliant spring assembly; a first electrode over the silicon substrate; a piezoelectric layer above the first electrode; a second electrode over the piezoelectric layer; a conductive top structural layer above the second electrode, wherein a center half of the actuator beam is configured as a positive deflection region, and wherein both the first electrode and the second electrode supply voltage to both positive and negative deflection regions of the actuator beam. | 02-25-2010 |
20100052477 | LARGE STROKE PIEZO ACTUATOR - An actuator device configured to provide a large stroke output. The actuator device including a first piezo element and a second piezo element disposed within a housing. The first piezo element and the second piezo element having a combined long dimension and a height, wherein the long dimension is greater than the height. A fluid region containing a hydraulic fluid is defined in the piezo actuator element at a mid-point of the long dimension and extending parallel with the height of the piezo actuator element. An amplifier including a piston element is slidably coupled to the fluid region. The amplifier provides a large stroke output of the piston element at a mid-point of the long dimension of the piezo actuator elements in response to displacement of the fluid within the fluid region when under the influence of an applied voltage. | 03-04-2010 |
20100079033 | FLUID AMPLIFIERS AND VIBRATION DAMPING AND ISOLATION SYSTEMS - Fluid amplifiers and vibration damping and isolation systems are provided. A fluid amplifier includes a housing assembly, a piezo-electric element, two amplification stages, and a rod. The piezo-electric element is disposed within the housing assembly and is capable of being energized to lengthen axially to provide an input stroke at an initial magnitude. The first amplification stage is disposed within the housing assembly adjacent to the piezo-electric element and is adapted to amplify the input stroke from the piezo-electric element to a first magnitude. The second amplification stage is disposed in series with the first amplification stage and is adapted to increase the input stroke from the first magnitude to a second magnitude that is greater than the first magnitude to yield an amplified input stroke. The rod extends through the second amplification stage and is coupled thereto to transmit the amplified input stroke having the second magnitude. | 04-01-2010 |
20100090564 | METHOD AND APPARATUS FOR UNLOCKING A PORTABLE TERMINAL USING PIEZOELECTRIC SENSORS - The present invention relates to a method and apparatus for unlocking a portable terminal, and more particularly, to a method and apparatus for unlocking a portable terminal capable of canceling a hold state of the portable terminal without using a hold key. A portable terminal may include at least one piezoelectric sensor. When a squeeze operation signal is generated as pressure is applied to the at least one piezoelectric sensor, the hold state of the portable terminal is canceled. | 04-15-2010 |
20100102677 | ELECTROACTIVE POLYMER TRANSDUCERS BIASED FOR OPTIMAL OUTPUT - Electroactive polymer transducers are disclosed. They are biased in a manner that provides for increased force and/or stroke output, thereby offering improved work potential and power output capacity. The biasing may offer additional or alternate functional advantage in terms of matching transducer performance with a given application such as a normally-closed valve. The improved biasing (including increased output biasing) may utilize negative spring rate biasing and/or a combination of negative or zero-rate biasing with positive rate biasing to achieve the desired ends. | 04-29-2010 |
20100109478 | DRIVING APPARATUS - A driving apparatus ( | 05-06-2010 |
20100109479 | DRIVE DEVICE - A driving apparatus is provided with: a first base portion; a first stage portion; a first elastic portion which has elasticity to displace the first stage portion in one direction (X axis); a second stage portion which is disposed on the first stage portion and on which a driven object is mounted; a second elastic portion which has elasticity to displace the second stage portion in other direction (Y axis); a first applying device for applying an excitation force for displacing the second stage portion such that the second stage portion is resonated in the other direction at a resonance frequency determined by the second stage portion and the second elastic portion; and a second applying device for applying a driving force for displacing, in a stepwise manner or in a continuous manner, the first stage portion in the one direction. | 05-06-2010 |
20100117487 | DRIVING APPARATUS - A driving apparatus ( | 05-13-2010 |
20100141092 | ELECTROACTIVE NANOSTRUCTURED POLYMERS AS TUNABLE ORGANIC ACTUATORS - An actuator element formed from an actuator composition is described, along with transducers including the same. The composition comprises: (i) a thermoplastic elastomer copolymer, the copolymer comprising at least one flexible midblock, and at least two glassy or semicrystalline endblocks; and (ii) a liquid modifier that selectively solvates the at least one flexible midblock. | 06-10-2010 |
20100148632 | USE OF A PLASTICIZER IN AN ELECTROACTIVE POLYMER COMPOSITION - The invention relates to the use of a plasticizer in a polymer composition for providing electroactivity to the composition or increasing the electroactivity of the composition. The invention further relates to an (an article) comprising an actuator for converting between mechanical and electrical energy comprising—at least two electrodes; and—an electroactive polymer composition, comprising a polar polymer and a polar plasticizer. | 06-17-2010 |
20100171392 | DRIVE APPARATUS - A drive apparatus includes a first frame, a second frame, a third frame, a first drive mechanism, and a second drive mechanism. The second frame is supported movably in a first direction with respect to the first frame. The third frame is supported movably in a second direction that intersects the first direction with respect to the second frame. The first drive mechanism is provided between the first frame and the second frame, and configured to move the first frame and the second frame relative to each other. The second drive mechanism is provided between the second frame and the third frame, and configured to move the second frame and the third frame relative to each other. Each of the first drive mechanism and the second drive mechanism has a drive generator configured to generate drive with a piezoelectric element, and a drive receiver that is pressed relative to the drive generator and receive the drive generated by the drive generator. An action direction in which the drive generator acts on the drive receiver in the first drive mechanism is parallel and opposite to an action direction in which the drive generator acts on the drive receiver in the second drive mechanism. | 07-08-2010 |
20100176689 | PIEZOELECTRIC TRANSMISSION SYSTEMS - Apparatus for transmitting motion to a moveable body comprising: a first bar having ends; two articulated arms, each comprising first and second arms connected at a joint having an axis about which the first and second arms rotate, wherein the first arms are of equal length, the second arms are of equal length and the second arm of each articulated arm is connected to a different end of the bar at a joint having an axis about which second arm and bar rotate; a mount connected to the first arm of each articulated arm at a joint having an axis about which first arm rotates; a second bar coupled to each articulated arm at a joint having an axis about which the second bar rotates; and a piezoelectric motor coupled to the first bar controllable to apply a force selectively in either direction along the bar's length; wherein, the joints are configured so that all the axes are substantially parallel and the first arms are parallel and the second arms are parallel for all rotations about the axes. | 07-15-2010 |
20100231091 | HIGH-PERFORMANCE ELECTROACTIVE POLYMER TRANSDUCERS - Transducers employing electroactive polymer films are disclosed. | 09-16-2010 |
20100301705 | PIEZOELECTRIC ACTUATOR AND METHOD OF MANUFACTURING THE SAME - A piezoelectric actuator includes a supporting substrate, a main body having a first piezoelectric laminate, a second piezoelectric laminate, and a displacement portion, and a first elastic layer. The first elastic layer is fixed to the main body so as to connect a lower surface of the first piezoelectric laminate, a lower surface of the second piezoelectric laminate, a side surface of the first piezoelectric laminate, and a side surface of the second piezoelectric laminate. A first region to fourth region of the first elastic layer is fixed to the principal surface of the supporting substrate by a first to fourth bonding portions. A non-bonding surface is not fixed to the principal surface of the supporting substrate. | 12-02-2010 |
20100308689 | TRANSDUCER - A multistage flextensional transducer includes at least one inner elongate driver member within and mechanically coupled to an inner shell that is nested within an outer shell; the inner shell comprising a pair of contact portions abutting the driver member and a pair of transmission portions on opposite sides of the inner shell between the contact portions; the outer shell being arranged so that the transmission portions act as bridging driver members between the said inner and outer shells, flexure of the outer shell being driven, on actuation of the transducer, by movement of the bridging driver members. The transducer may act as a push or pull actuator or sensor, may magnify displacement and may employ smart materials as driver members. Also cylindrical modules containing thin flextensional actuators may provide axial displacement in a downhole environment and may move a device axially along a downhole pipe or close a valve opening or inch along the pipe. | 12-09-2010 |
20100320870 | TEMPERATURE COMPENSATING FLEXTENSIONAL TRANSDUCER - A flextensional transducer that can be stored at room temperature and activated and operated at an elevated temperature in excess of 200° C., comprises (i) an elongate driver, (ii) a flextensional housing shell containing the elongate driver, comprising a pair of contact portions located on opposite sides of the housing shell and in mechanical contact with the ends of the driver, and having a different coefficient of thermal expansion from that of the driver, and (iii) thermal compensating members; the flextensional housing shell moving by flexing on actuation, the thermal compensating members being located in, or on, parts of the housing shell that move on actuation, and comprising a material having a different coefficient of thermal expansion from that of surrounding parts of the housing shell, such that as the temperature increases up to the said elevated temperature the thermal compensating members expand more or less than the said surrounding parts of the housing shell, causing the housing shell to flex so as to urge the contact portions of the housing shell towards each other to compensate for the greater thermal expansion of the housing relative to that of the driver member. | 12-23-2010 |
20110001395 | VIBRATING ELEMENT APPARATUS - The invention describes a vibrating tine level detection device, and a method of forming the same, which is particularly suitable for operation in environments subject to rapid temperature change. A piezoelectric stack, which generates vibration of the tine, is located within a cage. The cage is, in turn, located within a hollow body defined by a diaphragm, from which the tines extend, and a wall section. The cage is attached to the inside surface of the wall section, adjacent to the junction between the wall section and the diaphragm. As a consequence, the ability of the cage to maintain a substantially constant compression on the piezoelectric stack is substantially unaffected by thermal expansion or contraction of the wall section. | 01-06-2011 |
20110025170 | ELECTROACTIVE POLYMER DEVICE - The invention describes rolled electroactive polymer devices. The invention also describes employment of these devices in a wide array of applications and methods for their fabrication. A rolled electroactive polymer device converts between electrical and mechanical energy; and includes a rolled electroactive polymer and at least two electrodes to provide the mechanical/electrical energy conversion. Prestrain is typically applied to the polymer. In one embodiment, a rolled electroactive polymer device employs a mechanism, such as a spring, that provides a force to prestrain the polymer. Since prestrain improves mechanical/electrical energy conversion for many electroactive polymers, the mechanism thus improves performance of the rolled electroactive polymer device. | 02-03-2011 |
20110025171 | METHOD FOR TESTING PIEZOELECTRIC/ELECTROSTRICTIVE DEVICE, TESTING APPARATUS, AND METHOD FOR ADJUSTING PIEZOELECTRIC/ELECTROSTRICTIVE DEVICE - There is provided a method for testing a piezoelectric/electrostrictive actuator, wherein the displacement of a piezoelectric/electrostrictive actuator is estimated on the basis of the relations between one or more frequency characteristic values selected from the group consisting of the heights and areas of the peaks of the resonance waveforms and the difference of the maximum and minimum of the first order or first to higher orders of the resonance frequency characteristic values of the piezoelectric/electrostrictive actuator and the k-th order (k=1 to 4) of the first or first to higher orders of resonance frequencies. According to this piezoelectric/electrostrictive actuator testing method, a piezoelectric/electrostrictive actuator can be tested with high precision without actually driving the same as a product and without being accompanied by any disassembly/breakage. | 02-03-2011 |
20110080069 | PIEZOELECTRIC ACTUATION STRUCTURE INCLUDING AN INTEGRATED PIEZORESISTIVE STRAIN GAUGE AND ITS PRODUCTION METHOD - The invention relates to a piezoelectric actuation structure including at least one strain gauge and at least one actuator produced from a stack on the surface of a substrate of at least one layer of piezoelectric material arranged between a bottom electrode layer and a top electrode layer, at least a portion of the stack forming the actuator being arranged above a cavity produced in the substrate, characterized in that the strain gauge is a piezoresistive gauge located in the top electrode layer and/or the bottom electrode layer, the layer or layers including electrode discontinuities making it possible to produce said piezoresistive gauge. The invention also relates to a method for producing such a structure. | 04-07-2011 |
20110084571 | Magnetic Head Driving Piezoelectric Ceramic Actuator - A magnetic head driving piezoelectric ceramic actuator having an actuator body and a coating layer. The actuator body has a piezoelectric ceramic substrate and first and second electrodes. The piezoelectric ceramic substrate has first and second principal surfaces, first and second side surfaces, and first and second edge surfaces. The first electrode has a first external electrode portion formed on a part of the first principal surface, and a second external electrode portion formed on the first edge surface. The second electrode has a third external electrode portion formed on the second edge surface, and a fourth external electrode portion formed on the first principal surface. Each of: at least a part of each of the first and second external electrode portions; and at least a part of each of the third and fourth external electrode portions, constitutes a joined portion mounted on the substrate by an electrically-conductive agent. The coating film covers at least a part of a surface of a portion of the actuator body other than the joined portions. | 04-14-2011 |
20110109198 | PHASED ARRAY BUCKLING ACTUATOR - A harmonic buckling actuator is comprised of numerous buckling units engaged to a rotational track/gear. Each buckling unit includes two input translational actuators. One end of each input actuator is constrained to rotate about a rotational joint that is rigidly attached to a common ground. The other end of each input actuator is constrained to move with the other actuator of the same buckling unit along a single output axis via another rotational joint that is the output of the buckling unit. The inactivated, unforced configuration of each buckling unit is such that the input actuators are nearly collinear with the line segment connecting the unit's grounded rotational joints. This line segment is parallel to the output axis of the track/gear. The buckling units are arrayed around the track/gear such that their outputs are spatially phased within the groves of the track/gear. Harmonic activation of the buckling units generates torque on the track/gear about its output axis. The hollow section of the track/gear encompasses a gear reducer such as a planetary gear box, cyclo-drive, or harmonic drive. The track/gear is coupled to the slow speed shaft of the reducer. The buckling unit supports are rigidly coupled to each other and to the gear box of the reducer. The high speed shaft is the output shaft of the entire harmonic buckling actuator. | 05-12-2011 |
20110127884 | VIBRATION ACTUATOR MODULE - A vibration actuator module is disclosed. In accordance with an embodiment of the present invention, the vibration actuator module includes a vibrated body, a vibrating plate, which is coupled to the vibrated body and has a smaller elastic modulus than the vibrated body, and a driver, which is coupled to the vibrating plate. | 06-02-2011 |
20110133603 | COUPLING PIEZOELECTRIC MATERIAL GENERATED STRESSES TO DEVICES FORMED IN INTEGRATED CIRCUITS - A coupling structure for coupling piezoelectric material generated stresses to an actuated device of an integrated circuit includes a rigid stiffener structure formed around a piezoelectric (PE) material and the actuated device, the actuated device comprising a piezoresistive (PR) material that has an electrical resistance dependent upon an applied pressure thereto; and a soft buffer structure formed around the PE material and PR material, the buffer structure disposed between the PE and PR materials and the stiffener structure, wherein the stiffener structure clamps both the PE and PR materials to a substrate over which the PE and PR materials are formed, and wherein the soft buffer structure permits the PE material freedom to move relative to the PR material, thereby coupling stress generated by an applied voltage to the PE material to the PR material so as change the electrical resistance of the PR material. | 06-09-2011 |
20110148254 | APPARATUS FOR PRODUCING A HOLDING FRAME OR A TRANSMISSION FRAME FOR A STACKED PIEZOACTUATOR AND ELECTROSTRICTIVE DRIVE WITH A FRAME OF SAID TYPE - An apparatus for producing a holding or transmission frame ( | 06-23-2011 |
20110163634 | PIEZOELECTRIC ACTUATOR MODULE - Disclosed herein is a piezoelectric actuator module. The piezoelectric actuator module includes a flat plate, two or more elastic members, and a piezoelectric element. The elastic members are provided on each of opposite ends of the plate in a longitudinal direction thereof and protrude perpendicularly from the plate in such a way that a first end of each of the elastic members is coupled to an electronic device. The piezoelectric element is provided on a first surface of the plate and transmits vibrating force to the electronic device. The piezoelectric actuator module includes a plate having on opposite ends thereof two or more elastic members, thus being capable of controlling vibrating force by changing the length of the plate and the number of the elastic members, in addition to reliably supporting piezoelectric elements provided on the plate. | 07-07-2011 |
20110163635 | PIEZOELECTRIC ACTUATOR MODULE - Disclosed herein is a piezoelectric actuator module. The piezoelectric actuator module includes a flat plate. An elastic member is provided on each of opposite ends of the plate in a longitudinal direction thereof, and protrudes perpendicularly from the plate in such a way that a first end of the elastic member is coupled to an electronic device. A plate-shaped elastic body is provided on a first surface of the plate. A piezoelectric element is provided on a first surface of the elastic body. The plate-shaped elastic body is provided between the plate and the piezoelectric element, so that the overall spring constant of the piezoelectric actuator module is lowered and thus the vibrating force of the piezoelectric actuator module is increased. | 07-07-2011 |
20110181150 | PIEZOELECTRIC ALN RF MEM SWITCHES MONOLITHICALLY INTEGRATED WITH ALN CONTOUR-MODE RESONATORS - Piezoelectric switches and methods of forming piezoelectric switches. The piezoelectric switch includes first and second cantilever beam actuators. The second cantilever beam actuator has a projection that overlaps the first cantilever beam actuator in a contact region. The projection is mechanically separated from the first cantilever beam actuator by a nanogap such that the first and second cantilever beam actuators are electrically isolated from each other. Each of the first and second cantilever beam actuators includes a piezoelectric actuation layer. | 07-28-2011 |
20110181151 | RIGID DUAL-SERVO NANO STAGE - The present invention relates to a stage, particularly to, a stage which is able to move minutely, having a rigidity-improved transfer part. A stage includes a work table on which a working object is placed, a motor configured to provide a rotational force, a shaft rotated by the motor to transfer the work table, a linear moving part configured to be expandable to linearly move the shaft in an axial direction, the linear moving part having a hollow to insert an end of the shaft therein, and an expanding part configured to be expandable as far as the shaft is moved by the linear moving part. | 07-28-2011 |
20110241489 | PIEZOELECTRIC VIBRATOR AND ELECTRONIC DEVICE USING SAME - A piezoelectric vibrator is used in an electronic device having a screen. The piezoelectric vibrator includes a diaphragm, at least one piezoelectric layer attached to the diaphragm, and a vibrating element extending from the diaphragm for being coupled to a surface of the screen. | 10-06-2011 |
20110266922 | ELECTRONIC DEVICE - An electronic device | 11-03-2011 |
20110278988 | TORSIONAL MODE ULTRASONIC GENERATOR - Apparatus ( | 11-17-2011 |
20110285246 | MECHANICAL TEMPERATURE COMPENSATION METHODS AND DEVICES - The disclosure pertains to a device and a method for compensating for heat expansion effects in solid materials, as well as a method for manufacturing the device. | 11-24-2011 |
20120119620 | Multistage Force Amplification of Piezoelectric Stacks - Embodiments of the disclosure include an apparatus and methods for using a piezoelectric device, that includes an outer flextensional casing, a first cell and a last cell serially coupled to each other and coupled to the outer flextensional casing such that each cell having a flextensional cell structure and each cell receives an input force and provides an output force that is amplified based on the input force. The apparatus further includes a piezoelectric stack coupled to each cell such that the piezoelectric stack of each cell provides piezoelectric energy based on the output force for each cell. Further, the last cell receives an input force that is the output force from the first cell and the last cell provides an output apparatus force In addition, the piezoelectric energy harvested is based on the output apparatus force. Moreover, the apparatus provides displacement based on the output apparatus force. | 05-17-2012 |
20120187800 | Electromechanical Conversion Element and Actuator - An electromechanical conversion element having high connection reliability and an actuator equipped with the electromechanical conversion element. The electromechanical conversion element includes: a displacement part capable of expanding and contracting by application of voltage and having electrode forming faces and an adhesion face which are disposed adjacent to each other; and external electrodes on the electrode forming faces, in which lead electrodes for applying voltage to the displacement part are bonded to bonding regions provided in the external electrodes, and a driven member capable of being driven by the expansion and contraction of the displacement part is bonded to the adhesion face by an adhesive. The electromechanical conversion element further includes bleed flow blocking parts on the electrode forming faces at points closer to the adhesion face than ends of the bonding regions located on the same side as the adhesion face. | 07-26-2012 |
20120200197 | Oscillation Motor and Lens Driving Mechanism - An oscillation motor is provided in which the influence of vibration on other components by avoiding generation of noise in operation is reduced. The oscillation motor that makes an oscillator vibrate and transmits the vibration generated in the oscillator as a driving force by bringing the oscillator into pressure-contact with a driven body includes a base member; an oscillator that is mounted on the base member and is provided with a protruding output section on one side surface on one end side, the output section is arranged in contact with the driven body; and a press mechanism that is mounted on the base member and presses the oscillator toward the driven body on the other side surface on the opposite end side of the oscillator, wherein an vibration insulating member is provided between the base member and the press mechanism is employed. | 08-09-2012 |
20120217844 | PIEZOELECTRIC ACTUATOR AND PIEZOELECTRIC ACTUATOR ARRAY - An aspect of a piezoelectric actuator according to the present invention comprises: a plate-like piezoelectric element ( | 08-30-2012 |
20120217845 | TRANSDUCER - A multistage flextensional transducer includes at least one inner elongate driver member within and mechanically coupled to an inner shell that is nested within an outer shell; the inner shell comprising a pair of contact portions abutting the driver member and a pair of transmission portions on opposite sides of the inner shell between the contact portions; the outer shell being arranged so that the transmission portions act as bridging driver members between the said inner and outer shells, flexure of the outer shell being driven, on actuation of the transducer, by movement of the bridging driver members. The transducer may act as a push or pull actuator or sensor, may magnify displacement and may employ smart materials as driver members. Also cylindrical modules containing thin flextensional actuators may provide axial displacement in a downhole environment and may move a device axially along a downhole pipe or close a valve opening or inch along the pipe. | 08-30-2012 |
20120223619 | PIEZOELECTRIC ACTUATOR AND PIEZOELECTRIC ACTUATOR ARRAY - A piezoelectric actuator | 09-06-2012 |
20120262029 | FORMING A MEMBRANE HAVING CURVED FEATURES - Processes for making a membrane having a curved feature are disclosed. Recesses each in the shape of a reversed, truncated pyramid are formed in a planar substrate surface by KOH etching through a mask. An oxide layer is formed over the substrate surface. The oxide layer can be stripped leaving rounded corners between different facets of the recesses in the substrate surface, and the substrate surface can be used as a profile-transferring substrate surface for making a membrane having concave curved features. Alternatively, a handle layer is attached to the oxide layer and the substrate is removed until the backside of the oxide layer becomes exposed. The exposed backside of the oxide layer includes curved portions protruding away from the handle layer, and can provide a profile-transferring substrate surface for making a membrane having convex curved features. | 10-18-2012 |
20120319531 | ACTUATOR - An actuator, which can include piezoelectric material, is provided in the form of a single-layer or multi-layer flat plate. At least one layer has two electrodes spaced from each other by means of a separating area and arranged opposite each other both on the upper face of the at least one layer and on the lower face of the at least one layer. The electrodes of the upper face are arranged at an offset from the electrodes of the lower face. A motor is also provided to include the actuator and a movable element to be driven by means of the actuator. | 12-20-2012 |
20120326564 | DRIVE DEVICE USING POLYMER ACTUATOR - An actuator includes an electrolytic layer, a first electrode layer, and a second electrode layer. The electrolytic layer includes a polymer and an ionic liquid included in the polymer. When a voltage that makes the first electrode layer a positive side is applied, the actuator deforms to be in a drive state, thereby driving a protruding member. In a period other than a drive period in which the protruding member is driven, a reverse voltage that makes the first electrode layer a negative side is applied, thereby rectifying the tendency of the actuator to bow or the like. | 12-27-2012 |
20130062997 | Rotating Load Bearer - An electromechanical rotating actuator arrangement ( | 03-14-2013 |
20130140952 | PIEZOELECTRIC MOTOR, DRIVE UNIT, ELECTRONIC PART TRANSFER APPARATUS, ELECTRONIC PART INSPECTION APPARATUS, ROBOT, AND PRINTER - A piezoelectric motor includes a piezoelectric element, an oscillating plate including the piezoelectric element, a driving projection provided at an end of the oscillating plate, and a driven member driven by the driving projection coming into abutment therewith and is characterized in that Young's modulus E1 of the driving projection and Young's modulus E2 of the driven member are different. | 06-06-2013 |
20130154443 | PIEZOELECTRIC MATERIAL, PIEZOELECTRIC ELEMENT, LIQUID EJECTION HEAD, ULTRASONIC MOTOR, AND DUST REMOVING DEVICE - A piezoelectric material contains a perovskite oxynitride expressed by the General Formula: In the formula, x, y, z and w are numerical values satisfying the relationships: 0≦x≦1, 0≦y≦1, 006-20-2013 | |
20130214644 | DEVICE WITH SUSPENDED BEAM AND PIEZORESISTIVE MEANS OF DETECTING DISPLACEMENT OF THE BEAM AND METHOD OF MANUFACTURING THE DEVICE - A device with a suspended beam and piezoresistive means of detecting displacement of the beam and a method of manufacturing the device are disclosed. The device comprises a support, a suspended beam, moving parallel to the plane of the support, and means of detecting displacement, comprising at least two piezoresistive strain gauges that are not in line with each other. The beam is suspended through detection means. The two gauges are located on two opposite lateral faces of the beam respectively. | 08-22-2013 |
20130234561 | High Speed Smart Material Actuator with Second Stage - A smart material actuator apparatus having a smart material device, compensator, movable supporting member, two mechanical webs, two actuating arms, and a second stage assembly. Application of an electrical potential causes the smart material device to expand, thereby moving the actuating arms. That movement causes resilient strips to urge a second stage attachment surface in a direction substantially parallel to the smart material device. Optional dampening assemblies may be added where high speed operation is desired, and an optional valve assembly may be attached where an actuated valve, such as a high speed actuated air valve, is needed. | 09-12-2013 |
20130234562 | Multiple Arm Smart Material Actuator with Second Stage - An actuator apparatus comprising a smart material device, a compensator, a movable supporting member, at least three mechanical webs, at least three actuating arms, and a second stage assembly is disclosed wherein the mechanical webs comprise a first resilient member attached to the compensator and a second resilient member attached to said movable supporting member. A piezoelectric or smart material device is affixed between the first mounting surface and the compensator. The actuating arms comprise a first actuating arm end attached to one mechanical web and a second actuating arm end attached to the second stage assembly. The second stage assembly comprises resilient strips having a first end attached to the actuating arm and a second end attached to a second stage attachment surface. Application of an electrical potential causes the smart material device to expand, thereby urging the movable supporting member away from the compensator and causing the first and second resilient members to flex. This in turn causes the actuating arms to move. The resilient strips urge the second stage attachment surface in a direction substantially parallel to the smart material device. | 09-12-2013 |
20130241354 | PIEZOACTUATOR AND A METHOD FOR PRODUCING SUCH A PIEZOACTUATOR - A piezo actuator includes an actuator body with a plurality of piezo elements and a tensioning device loading the actuator body with a bias. The tensioning device includes a traction device mounted as a biased winding on the actuator body in a plurality of turns around the actuator body. The traction device is at least one of resilient or flexible. | 09-19-2013 |
20130270965 | PIEZOELECTRIC MATERIAL, PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD, ULTRASONIC MOTOR, AND DUST REMOVING DEVICE - Provided is a piezoelectric material that achieves both high piezoelectric performance and high Curie temperature. In addition, provided are a piezoelectric element, a liquid discharge head, an ultrasonic motor, and a dust removing device, which use the piezoelectric material. The piezoelectric material includes a perovskite-type metal oxide that is expressed by the following general formula (1): xBaTiO | 10-17-2013 |
20130285509 | METHOD FOR PRODUCING AN ACTUATOR UNIT AND SLEEVE FOR RECEIVING A PIEZOACTUATOR - The invention relates to a method for producing an actuator unit comprising a piezoactuator ( | 10-31-2013 |
20130328445 | FORCE MODULE WITH SUB-MODULES AND A CONTROLLING AND PROTECTION MODULE FOR GENERATING FORCES IN A HIGHLY DYNAMIC MANNER - The invention relates to a force module ( | 12-12-2013 |
20140028153 | VIBRATION ACTUATOR - There is provided a vibration actuator including: a housing providing an internal space and including holes formed to allow the internal space to be in communication with the outside; a diaphragm disposed to separate the internal space into first and second chambers; a mass body coupled to the diaphragm; and a piezoelectric element coupled to one inner surface of the housing and disposed under the mass body. | 01-30-2014 |
20140055005 | MECHANICAL DESIGN OF DEFORMATION COMPENSATED FLEXURAL PIVOTS STRUCTURED FOR LINEAR NANOPOSITIONING STAGES - A method and deformation compensated flexural pivots structured for precision linear nanopositioning stages are provided. A deformation-compensated flexural linear guiding mechanism includes a basic parallel mechanism including a U-shaped member and a pair of parallel bars linked to respective pairs of I-link bars and each of the I-bars coupled by a respective pair of flexural pivots. The basic parallel mechanism includes substantially evenly distributed flexural pivots minimizing center shift dynamic errors. | 02-27-2014 |
20140077660 | SMART MATERIAL ACTUATOR - A smart material actuator including a smart material stack and a compensator preventing expansion of the stack in a non-driving direction. When actuated, the smart material stack causes a force transfer surface to be driven in the driving direction, thereby actuating a first stage amplifier having two arms, which in turn actuates a second stage amplifier having two arms. | 03-20-2014 |
20140152151 | Device for Precision Displacement - A device for performing a precision movement comprising a plate composed of piezoelectric material and comprising electrodes which are provided at mutually opposite and preferably parallel planes, are connectable to a controlled voltage source having electrical voltage and in this case bring about a change in the form and/or mass of the plate is characterized in that at least one of the electrodes is designed in an elastic fashion to form a base module. | 06-05-2014 |
20140159546 | PIEZOELECTRIC ACTUATOR AND APPARATUS FOR GENERATING VIBRATIONS INCLUDING THE SAME - There is provided a piezoelectric actuator including: positive electrode layers and negative electrode layers iteratively alternately vertically laminated; piezoelectric element layers interposed between the positive electrode layers and the negative electrode layers, respectively; a positive electrode (or anode) connection pillar provided in a position corresponding to less than 50% of maximum displacement in the event of driving and penetrating the electrode layers and the piezoelectric element layers to connect the positive electrode layers; and a negative electrode (or cathode) connection pillar provided in a position corresponding to less than 50% of maximum displacement in the event of driving and penetrating the electrode layers and the piezoelectric element layers to connect the negative electrode layers. | 06-12-2014 |
20140184024 | MONOLITHIC ENERGY HARVESTING SYSTEM, APPARATUS, AND METHOD - An energy harvesting device utilizing a monolithic, mesoscale, single-degree-of-freedom inertial based resonator in which the support structure, beam-spring, and proof mass are a single component without joints, bonds, or fasteners. Frequency tuning features include holes in the proof mass in which mass can be added to change the devices resonance frequency as well as levers which add curvature to the beam-spring system and adjust system stiffness. Robustness is increase by designing the resonator to exhibit nonlinear behavior such that its power density is maximized for low vibration amplitudes and minimized for high amplitudes. The device structural resonance modes are designed to be much higher than the resonators proof mass-spring resonance frequency. Electromechanical transducers are used to convert the resonators mechanical energy to electrical energy. Electrical circuitry is included to extract and condition the electrical charge. | 07-03-2014 |
20140319967 | OSCILLATION ACTUATOR - The oscillation actuator of the invention uses ultrasonic vibrations generated in a stator to rotate a rotor, and a pre-load member causes a 30 MPa contact pressure between the rotor and the stator. Furthermore, a supply body impregnated with oil is provided inside a recess section in the stator, such that the contact section between the rotor and the stator is lubricated by oil supplied from the supply body. As the oil with which the supply body is impregnated, a fluorine-based oil having a kinetic viscosity at 40° C. of VG 400 according to the ISO viscosity classification is selected. | 10-30-2014 |
20140333181 | Haptic Feedback Device - Disclosed is a haptic feedback device. The device includes a first frame, a second frame connected with the first frame, a display mounted in the first frame, an actuator for driving the display to vibrate thereby generating sound, and a connecting unit for connecting the first frame and the second frame. | 11-13-2014 |
20150015117 | MULTIDIRECTIONAL VIBRATION GENERATOR USING SINGLE VIBRATOR AND METHOD FOR THE SAME - Disclosed is a vibration generating method includes providing a vibration generating device which receives a driving power and generates a vibration, and controlling vibration of a vibrator of the vibration generating device, wherein the vibration of the vibrator is controlled by systematizing an inertia matrix and a stiffness matrix of the vibrator, and wherein the inertia matrix and the stiffness matrix simultaneously satisfy diagonalization. A vibration generating device using this method is also disclosed. | 01-15-2015 |
20150022057 | PIEZOELECTRIC DEVICE, METHOD FOR MANUFACTURING THE SAME, AND DRIVEN ASSEMBLY WITH THE SAME - The present invention relates to a piezoelectric device. A piezoelectric device in accordance with an embodiment of the present invention includes a piezoelectric member and a connection member which are coupled to each other, wherein the piezoelectric member includes a polycrystalline member made of a polycrystalline piezoelectric material, a single crystal member made of a single crystal piezoelectric material and coupled to the connection member, and a textured member provided between the polycrystalline member and the single crystal member and having intermediate properties of the polycrystalline piezoelectric material and the single crystal piezoelectric material. | 01-22-2015 |
20150061462 | VIBRATION PRODUCING DEVICE AS WELL AS ELECTRONIC DEVICE AND HUMAN BODY FITTING ARTICLE BOTH EMPLOYING SUCH VIBRATION PRODUCING DEVICE - The vibration producing device includes a driving shaft being placed under slight rapid vibratory movements in its axial direction, a slight rapid vibratory movements producing member coupled with one end of the driving shaft for causing the driving shaft to be vibrated with the slight rapid vibratory movements, a casing for supporting at least either the driving shaft or the slight rapid vibratory movement producing member in such a manner that the driving shaft can be vibrated with the slight rapid vibratory movements in its axial direction, and a weight member to be coupled with the driving shaft in order to permit the weight member to move in its axial direction under the slight rapid vibratory movements of the driving shaft, wherein the casing is vibrated by allowing the weight member to be moved forwards and backwards alternately along the driving shaft in its axial direction. | 03-05-2015 |
20150091413 | FLEXIBLE DISPLAY DEVICE - A flexible display device includes a display panel having pliability and a dielectric elastomer unit on the display panel. The dielectric elastomer unit is reversibly deformable by an applied voltage to provide stiffness to the display panel. | 04-02-2015 |
20150097467 | STRAIN AMPLIFICATION STRUCTURE AND SYNTHETIC JET ACTUATOR - A strain amplification structure has a frame with a hexagonal structure incorporating a plurality of rigid beams that are connected to opposing end beams by a plurality of flexible joints. A piezoceramic actuator assembly is connected to the opposing end beams having a collar including an opening. A shaft providing an output is connected to the plurality of rigid beams with flexible joints and passes through the opening in the collar for non-interfering motion orthogonal to the actuator assembly. | 04-09-2015 |
20150137664 | PIEZOELECTRIC ACTUATOR ARRAY - A piezoelectric actuator array comprising a substrate plate ( | 05-21-2015 |
20150375265 | UNIMORPH-TYPE ULTRASOUND PROBE - A unimorph-type ultrasound probe has a plurality of piezoelectric element regions which extend in a minor axis direction and are arranged at a predetermined arrangement pitch in a major axis direction, a plurality of minute piezoelectric element portions are formed so as to be arranged in each piezoelectric element region, the size of the plurality of minute piezoelectric element portions is changed in the minor axis direction, the plurality of minute piezoelectric element portions are arranged such that the size of the piezoelectric element portions in both end portions in the minor axis direction becomes smaller than the size of the piezoelectric element portions in a central portion in the minor axis direction, and ultrasonic waves having different frequencies are radiated from the piezoelectric element portions having different sizes. | 12-31-2015 |
20160049575 | AMPLIFIED PIEZO ACTUATOR WITH COARSE ADJUSTMENT - A piezoelectric actuator with integrated features to provide coarse position adjustment of a pushing threaded rod and also mechanically amplified piezo motion for fine position adjustment is presented here in three design variants. The mechanical amplifier houses one or more piezo stacks in longitudinal axis with preload to translate an amplified motion in the order of a few times in the transverse axis, perpendicular to the piezo stack motion. The piezo amplifier output travel is transmitted to the threaded rod with a ball at the end to push a desired surface for position adjustments and motion translation in application such as a mirror mount. | 02-18-2016 |
20160079512 | AMPLIFIED PIEZO ACTUATOR WITH MOTORIZED ADJUSTMENT SCREW - A piezoelectric actuator with integrated features to provide linear displacement of a threaded rod is presented. One mechanism provides mechanically amplified piezo motion for high speed/short travel position scanning whereas the other provides a low speed/long travel piezo motorized position adjustment. Mechanical amplifier incorporates one or more piezo stacks in longitudinal axis with preload to translate an amplified motion in the order of a few times in the transverse axis, perpendicular to the piezo stack motion. The piezo amplified output travel is transmitted to the internally threaded features of the other mechanism where a screw with a ball at the end to push a desired surface for high speed scanning mode translation. The internally threaded feature of the other mechanism is also operated by a secondary piezo stack which produces slip-stick motion steps to rotate the screw in one direction or the other to produce a slow speed/long travel mode. | 03-17-2016 |
20160134203 | Apparatus And Method For Lifting Objects - A device and a method for moving an object in a vertical direction are disclosed. The device includes a plurality of piezo-actuators expanding in directions upon activation and in doing so generating pressure forces on an active side, and a hydraulic transmission device that converts the pressure forces of the piezo-actuators into a vertical pressure force for moving the object opposite the direction of gravity and transmits the pressure force with a transmission ratio. The object is lifted after the vertical pressure force has exceeded an oppositely acting spring force of a spring system. | 05-12-2016 |
20160172575 | CONDUCTIVE PASTE FOR INTERNAL ELECTRODE, PIEZOELECTRIC ELEMENT, AND PIEZOELECTRIC VIBRATION MODULE INCLUDING THE SAME | 06-16-2016 |
20160190429 | PIEZOELECTRIC FILM AND PIEZOELECTRIC CERAMICS - An object is to cause a piezoelectric film to perform a piezoelectric operation at a higher voltage than the conventional piezoelectric film. An aspect of the present invention is a piezoelectric film, wherein a voltage at which a piezoelectric butterfly curve that is a result obtained by measuring a piezoelectric property of a piezoelectric film takes a minimum value is larger by 2 V or more than a coercive voltage of a hysteresis curve that is a result obtained by measuring a hysteresis property of said piezoelectric film. The piezoelectric film includes an anti-ferroelectric film, and a ferroelectric film formed on the anti-ferroelectric film. | 06-30-2016 |
20160254437 | Bistable Piezoelectric Cantilever Vibration Energy Generator Based on Spherical Composite Structure and Partial Separation of Different Layers | 09-01-2016 |
20160380177 | PIEZOELECTRIC/ELECTROSTRICTIVE ACTUATOR - A piezoelectric/electrostrictive (“PE”) actuator includes a PE element including a laminated object having a PE layer and a pair of electrodes arranged respectively on both sides of the PE layer, and having an operating part corresponding to the portion in which the PE layer is sandwiched between the pair of electrodes and a non-operating part corresponding to the portion in which the PE layer is not sandwiched between the pair of electrodes, and a moisture-proof film covering at least the vicinity of a boundary between the operating part and the non-operating part, consisting of a liquid with a saturated moisture content at 25 degree Celsius of 300 ppm or less and a withstand voltage at the saturated moisture content of not less than 6 kV/mm. The liquid contains hydrocarbon system organic compound having a main backbone of carbon-carbon bond and consisting only of carbon and hydrogen. | 12-29-2016 |
20160380178 | VIBRATION ACTUATOR - To provide a vibration actuator capable of both rotation and linear drive and providing a stable driving force. | 12-29-2016 |
20170237367 | VIBRATION-TYPE-MOTOR DRIVING APPARATUS | 08-17-2017 |