| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 310329000 | Including inertia type operator | 30 |
| 20080297004 | Driving device capable of transferring vibrations generated by an electro-mechanical transducer to a vibration friction portion with a high degree of efficiency - 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 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 vibration friction portion is made of a material having a vibration transfer rate of 4900 meters/second or more. The moving portion is made of a material which has a vibration transfer rate of 4900 meters/second or more and which is different from that of the vibration friction portion. | 12-04-2008 |
| 20090021117 | VIBRATION DETECTING SENSOR AND PRESSURE SENSITIVE SWITCH USING CABLE-SHAPED PIEZOELECTRIC ELEMENT - A challenge to be met by the present invention is to provide a vibration detection sensor which can be applied to various instruments or fields requiring accurate detection and measurement of vibration. | 01-22-2009 |
| 20090021118 | DRIVING APPARATUS - A driving apparatus comprises: an electromechanical conversion element that expands and contracts in an extending direction of a given fiducial line; a driving shaft mounted on one end of the electromechanical conversion element in the extending direction; a driven member frictionally engaged with the driving shaft; a holder that supports the electromechanical conversion element from lateral sides with respect to extending direction; and an urging member that urges the electromechanical conversion element in the extending direction. | 01-22-2009 |
| 20090284103 | Electric Generating Unit as Substitute for Vehicle Battery - An electric generating unit as a substitute for a vehicle battery includes a housing including an air pressure control member to control air pressure in an inner space of the housing, at least a diaphragm unit configured to sufficiently fluidly-insulate the inner space of the housing from outside of the housing and flexibly deformable by an inertia applied by a mass unit according to an external force so as to generate electricity, wherein the mass unit is formed on the diaphragm unit. | 11-19-2009 |
| 20090322183 | INERTIAL SENSOR AND INERTIAL DETECTING DEVICE - An inertial sensor includes a first beam, a first proof mass section and a first upper surface stopper section. The first beam extends in a first direction in a plane parallel to a major surface of a substrate and is held with a spacing from the major surface of the substrate. The first beam has a first detecting section including a first upper side electrode, a first lower side electrode, and a first upper side piezoelectric film provided between the first upper side electrode and the first lower side electrode. The first beam has one end connected to the major surface of the substrate. The first proof mass section is connected to the other end of the first beam and held with a spacing from the major surface of the substrate. The first upper surface stopper section is provided on the opposite side of the first proof mass section from the substrate with a spacing from the first proof mass section. | 12-31-2009 |
| 20100270889 | PIEZO DEVICES WITH AIR-SPACED CANTILEVER - An arrangement that converts mechanical energy into electrical energy employs a base member and a cantilever member coupled thereto. The cantilever member has two piezoelectric layers with an air space therebetween. A proof mass is coupled to the cantilever member distal from the base member. The first and second piezoelectric layers are formed of lead zirconate titanate (PZT), and the output voltage of the cantilever member is proportional to the height of the air gap. A piezoresistive accelerometer that is useful for measuring mechanical vibration has a suspension beam and a piezoresistive layer be separated from the suspension beam. A method of monitoring an acoustic vibration utilizes a piezoresistive element having an air-spaced cantilever formed of a piezoelectric material in the vicinity of the system to be monitored and obtains an alternating voltage form the air-spaced cantilever of the piezoresistive element. | 10-28-2010 |
| 20110074247 | Systems and Methods for Resonance Frequency Tuning of Micromachined Structures - A microstructure according to embodiments of the present invention comprises a substrate, and a resonant structure having a resonance frequency and comprising a seismic mass and suspension elements for suspending the seismic mass at two opposite sides onto the substrate. The substrate is adapted for functioning as a tuning actuator adapted for applying stress onto the suspension elements, thus changing the stiffness of the suspension elements. This way, the resonance frequency of the microstructure may be adapted to input vibration frequencies which may vary over time or may initially be unknown. By adapting the resonance frequency of the resonant structure, a suitable power may be generated, even in circumstances of variable input frequencies. | 03-31-2011 |
| 20120007470 | PIEZOELECTRIC GENERATING APPARATUS - A piezoelectric generating apparatus includes a plurality of piezoelectric bodies arranged at intervals via a gap. Each of the plurality of piezoelectric bodies includes a fixed end and a free end. A first surface electrode is formed on one side of each of the plurality of piezoelectric bodies, and a second surface electrode is formed on an opposite side of each of the plurality of piezoelectric bodies. A weight spans the plurality of piezoelectric bodies and attached to the free ends of the plurality of piezoelectric bodies. The plurality of piezoelectric bodies are curved upon application of acceleration to the weight from the outside in a lateral direction. | 01-12-2012 |
| 20120043855 | Inertial Sensor - Disclosed herein is an inertial sensor of the present invention. An inertial sensor | 02-23-2012 |
| 20120098388 | DOME-SHAPED PIEZOELECTRIC LINEAR MOTOR - The present invention relates to a dome-shaped piezoelectric linear motor, and provides a piezoelectric linear motor having enhanced displacement using dome-shaped piezoelectric ceramic. A dome-shaped piezoelectric linear motor (DSPLM) comprises: a dome-shaped piezoelectric ceramic actuator which has two surfaces applied with different electrodes; a bar-shaped vibration shaft which is vertically fixed at the apex of the dome-shaped piezoelectric ceramic actuator; a cylinder-shaped mobile element which is inserted into the vibration shaft and moves linearly along the vibration shaft; and a ceramic restraining element which is fixed at a lower edge portion of the dome-shaped piezoelectric ceramic actuator. Therefore, the vibration displacement in the direction of the vibration shaft is increased when compared to the vibration displacement in the thickness direction of planar piezoelectric ceramic. | 04-26-2012 |
| 20120139390 | VIBRATIONAL WAVE MOTOR, LENS BARREL AND CAMERA - A vibrational wave motor includes a motor main body and pressing member. The motor main body includes an electromechanical conversion element, elastic body and relative motion member. The elastic body joined to the electromechanical conversion element generates an oscillating wave. The relative motion member in pressure contact with the elastic body is rotationally driven relative to the elastic body. The pressing member generates a pressing force between the elastic body and relative motion member. The pressing member includes a pressure applying portion, extension portion and pressing main body. The pressure applying portion presses one of the elastic body and the relative motion member towards the other, along a rotation axis. The extension portion extends outward from the pressure applying portion in a radial direction centered about the rotation axis. The pressing main body is disposed more outward in the radial direction than the motor main body at the extension portion. | 06-07-2012 |
| 20120319532 | ELECTRICITY GENERATOR HAVING RECOVERY OF ENERGY FROM MECHANICAL VIBRATIONS - The invention relates to an electricity generator having recovery of mechanical vibration energy, including a bistable system suitable for adopting one stable position or another relative to two ends in response to being energized in a predetermined direction (F | 12-20-2012 |
| 20120326565 | ENERGY HARVESTING/TIRE PRESSURE, TEMPERATURE AND TIRE DATA TRANSMITTER - The invention embodies a harvester ( | 12-27-2012 |
| 20130088123 | SOFT MECHANICAL STOPS TO LIMIT OVER-TRAVEL OF PROOF MASSES IN CANTILEVERED PIEZOELECTRIC DEVICES - A piezoelectric device is disclosed which has a built-in soft stop which serves for protection against excessive force. | 04-11-2013 |
| 20130147317 | MEMS KINETIC ENERGY CONVERSION - The present disclosure provides a micro device. The device has a micro-electro-mechanical systems (MEMS) movable structure, a plurality of metal loops over the MEMS movable structure, a piezoelectric element over the MEMS movable structure, and a magnet disposed over the plurality of metal loops. The MEMS movable structure, the plurality of metal loops, and the piezoelectric element are encapsulated. | 06-13-2013 |
| 20130169113 | INERTIAL SENSOR AND METHOD OF MANUFACTURING THE SAME - Disclosed herein are an inertial sensor and a method of manufacturing the same. The inertial sensor | 07-04-2013 |
| 20130307375 | MEMS DEVICE FABRICATED WITH INTEGRATED CIRCUIT - A planar integrated MEMS device has a piezoelectric element on a dielectric isolation layer over a flexible element attached to a proof mass. The piezoelectric element contains a ferroelectric element with a perovskite structure formed over an isolation dielectric. At least two electrodes are formed on the ferroelectric element. An upper hydrogen barrier is formed over the piezoelectric element. Front side singulation trenches are formed at a periphery of the MEMS device extending into the semiconductor substrate. A DRIE process removes material from the bottom side of the substrate to form the flexible element, removes material from the substrate under the front side singulation trenches, and forms the proof mass from substrate material. The piezoelectric element overlaps the flexible element. | 11-21-2013 |
| 20130328446 | PIEZOELECTRIC POWER GENERATOR - Provided is a piezoelectric power generator that has an overall compact size and in which a plurality of piezoelectric elements having a low natural frequency of vibration and that generate a large amount of power can be arranged in a compact manner. | 12-12-2013 |
| 20140055006 | VIBRATION GENERATION DEVICE - There is provided a vibration generation device. The vibration generation device may include a housing including an internal space; a piezoelectric actuator mounted in the housing to be disposed in the internal space and including a piezoelectric element deformed in a horizontal direction; a direction conversion member fixed to the piezoelectric actuator; and a vibrator disposed in the internal space while being fixed to the direction conversion member, and displaced in a vertical direction due to a deformation of the piezoelectric actuator in the horizontal direction. | 02-27-2014 |
| 20140077661 | VIBRATING ACTUATOR - There is provided a vibrating actuator including: a housing including an inner space; a piezoelectric element mounted on a portion of an inner surface of the housing; a mass body disposed above the piezoelectric element; a first elastic member disposed between the piezoelectric element and the mass body to elastically support the mass body; and a second elastic member having one end joined to the housing and the other end joined to the mass body to elastically support the mass body. | 03-20-2014 |
| 20140175947 | PIEZOELECTRIC VIBRATION MODULE - Disclosed herein is a piezoelectric vibration module including: a piezoelectric element repeatedly extended and compressed according to application of external power to generate vibration force; a vibration plate having the piezoelectric element coupled to one surface thereof and repeatedly extended and compressed integrally with the piezoelectric element to transfer the vibration force of the piezoelectric element to an external component; a weight body having a central portion coupled to the other side of the vibration plate in order to increase the vibration force of the piezoelectric element; and a coupling member fixedly coupling the central portion of the weight body and the vibration plate to each other. | 06-26-2014 |
| 20140265731 | FORCE GENERATOR FOR MOUNTING ON A STRUCTURE - A force generator for mounting on a structure in order to introduce vibrational forces in a controlled manner into said structure for affecting vibrations is provided. The force generator includes at least one spring arm on which a flexural arm having an inertial mass and extending in the direction toward the attaching point is fastened, and having at least one piezo transducer at both ends of the spring arm. The center of gravity of the inertial mass is disposed in the region of the center of the spring arm. Alternatively, two guide springs are disposed on both sides of the spring arm parallel thereto, in order to generate a vibrational motion, wherein the fastening point of the flexural arm comprises an unchanged orientation during the vibrational motion. | 09-18-2014 |
| 20140346928 | VIBRATION GENERATING APPARATUS - There is provided a vibration generating apparatus including: a housing having an internal space; an elastic member having an edge part fixedly attached to the housing; a piezoelectric element fixedly attached to a lower surface of a central portion of the elastic member; and a mass body fixedly attached to an upper surface of the central portion of the elastic member. | 11-27-2014 |
| 20140346929 | PIEZOELECTRIC VIBRATION MODULE AND VIBRATION GENERATING APPARATUS INCLUDING THE SAME - There are provided a piezoelectric vibration module and a vibration generating apparatus including the same. The piezoelectric vibration module includes: a piezoelectric actuator including a piezoelectric element deformed in both a first direction and a second direction perpendicular to the first direction through the application of electrical power thereto; at least one first rod transferring deformation force of the piezoelectric actuator in the first direction; at least one second rod converting deformation force of the piezoelectric actuator in the second direction into deformation force in the first direction and transferring the converted deformation force; and a mass body connected to the first and second rods and disposed on the piezoelectric actuator so that displacement is generated in the first direction. | 11-27-2014 |
| 20150061463 | INERTIAL DRIVE ACTUATOR - An inertial drive actuator includes a displacement unit which generates a minute displacement in a first direction, and in a second direction, a coil which generates a magnetic flux, a movable object which has a surface facing at least one surface of the coil, and a first yoke which converges the magnetic flux generated by the coil, at a predetermined position, a detecting unit which detects an electric signal of the coil, reflecting a change in the magnetic flux near the coil based on a positional relationship of the movable object and the coil, and a judging unit which judges a position of the movable object, and the inertial drive actuator drives the movable object by controlling a frictional force acting on the movable object, by controlling the magnetic flux generated by the coil, and the coil carries out generation of the magnetic flux and detection of the magnetic flux. | 03-05-2015 |
| 20150061464 | ENERGY HARVESTER USING MASS AND MOBILE DEVICE INCLUDING THE ENERGY HARVESTER - Provided are an energy harvester using a mass, and a mobile device including the energy harvester. The energy harvester includes: a mass; first and second substrates spaced apart from each other, wherein one of the first and second substrates is connected to the mass; first and second electrodes provided on the first and second substrates; and an energy generator provided between the first and second electrodes, wherein the energy generator generates electric energy upon a relative movement between the first substrate and the second substrate caused by a movement of the mass. | 03-05-2015 |
| 20150303835 | POWER-GENERATING DEVICE - A power-generating device includes a vibration plate, a lower electrode on the vibration plate, a piezoelectric layer made of piezoelectric material on the lower electrode, and an upper electrode on the piezoelectric layer, a fixing member for supporting a fixed end of the vibration plate. The vibration plate applies compressive stress to the piezoelectric layer when the vibration plate does not vibrate. The power generating device is excellent in long-term reliability. | 10-22-2015 |
| 20160096198 | VIBRATION GENERATING DEVICE - There is provided a vibration generating device including: a housing having an internal space; a vibration member having one end fixedly attached to the housing; a piezoelectric element installed on the vibration member; and a mass body fixedly attached to the vibration member, wherein the vibration member includes an installation part on which the piezoelectric element is installed, and an extension part extended from at least one side surface of the installation part, and a maximum displacement portion of the vibration member is changed depending on a vibration mode. | 04-07-2016 |
| 20160101438 | PIEZOELECTRIC VIBRATION ACTUATOR - There is provided a piezoelectric vibration actuator including: a flat cover member; a vibration portion including a vibration plate that is spaced apart from the cover member in parallel by a predetermined distance and a piezoelectric element that generates a vibration force by repeatedly expanding and contracting according to power applied from the outside; a weight portion disposed on the vibration portion to increase the vibration force of the piezoelectric element; and a binding member fixing the vibration portion and the weight portion. | 04-14-2016 |
| 20160105131 | VIBRATION GENERATING DEVICE - There is provided a vibration generating device including: a housing having an internal space; a first vibrating part having one end which is fixed to one end of the housing to be a fixed end and the other end which is a free end; a second vibrating part disposed to face the first vibrating part and having one end which is fixed to the other end of the housing to be a fixed end and the other end which is a free end; and a mass body having one end which is fixed to the free end of the first vibrating part and the other end which is fixed to the free end of the second vibrating part to be vibrated vertically by the first and second vibrating parts. | 04-14-2016 |
