| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 310323030 | Traveling wave motor | 28 |
| 20090015100 | VIBRATION WAVE DRIVEN APPARATUS AND VIBRATOR - A vibration wave driven apparatus which makes it possible to secure a required component accuracy obtained by machining and can increase a power ratio to the size of the apparatus. A plurality of contact parts are formed on one surface of an elastic vibration plate of a vibrator, and are disposed in contact with a friction member of a slider. A piezoelectric element plate is joined to the other surface of the vibration plate. Thinner parts as recessed parts are formed in the vibration plate at locations other than the contact parts, whereby the vibration plate is disposed in contact with the friction member of the slider at the contact parts. | 01-15-2009 |
| 20090212662 | Vibration actuator, lens barrel and camera - A vibration actuator with good driving performance, and a lens barrel and camera equipped therewith, is provided. There is provided a vibration actuator comprising: an electromechanical conversion element that is excited by a driving signal; a vibrating body including a joining face, to which the electromechanical conversion element is joined, and a driving face, at which a vibration wave is produced by the excitation; and a relative motion member that is pressingly touched against the driving face, is driven by the vibration wave, and relatively moves with respect to the vibrating body, wherein at a first and a second portion of the electromechanical conversion element in a direction parallel to the joining face and orthogonal to a direction of the relative movement of the vibrating body and the relative motion member, thickness in a direction orthogonal to the joining face differs between the first portion and the second portion. | 08-27-2009 |
| 20090261690 | Ultrasonic wave handling device and a microscopic in-tube inspection system - An ultrasonic wave handling device for freely revolving and/or sliding (protruding and pulling in) a working member is provided. | 10-22-2009 |
| 20100084946 | ULTRASONIC MOTOR AND CONVEYING APPARATUS HAVING THE SAME - An ultrasonic motor includes a fixed member including a surface, a movable member positioned to face the surface of the fixed member, and an actuator to cause at least a portion of the movable member to contact the surface of the fixed member and cause the movable member to move relative to the fixed member. | 04-08-2010 |
| 20120228998 | PIEZOELECTRIC ELEMENT, AND PIEZOELECTRIC ACTUATOR AND VIBRATION WAVE MOTOR INCLUDING PIEZOELECTRIC ELEMENT - Provided is a piezoelectric element including: an electrode portion including a piezoelectric layer and an electrode layer that are laminated; and a non-electrode portion that is in contact with the electrode portion and includes a piezoelectric layer without an electrode layer, in which the non-electrode portion includes a region having a density smaller than a density of the piezoelectric layer of the electrode portion. | 09-13-2012 |
| 20160020712 | VIBRATION WAVE MOTOR - A vibration wave motor includes a vibration plate having a flat plate portion and protruding portions, a piezoelectric element that performs high-frequency vibration, a friction member contacting the protruding portions, and a first natural vibration mode and a second natural vibration mode, which are excited in the vibration plate by the high-frequency vibration, the vibration plate and the friction member moving relatively to each other, maximum amplitude generated on tip ends of the protruding portions by the first natural vibration mode is larger than maximum amplitude generated on tip ends of the protruding portions by the second natural vibration mode, a resonance frequency of the first natural vibration mode is lower than a resonance frequency of the second natural vibration mode, and amplitudes of the first natural vibration mode and the second natural vibration mode in a frequency range at a time of drive substantially coincide with each other. | 01-21-2016 |
| 310323040 | Stator | 19 |
| 20130015746 | VIBRATING BODY FOR VIBRATION WAVE DRIVE DEVICE AND METHOD OF PRODUCING VIBRATING BODY FOR VIBRATION WAVE DRIVE DEVICE - Provided is a method of producing a vibrating body for a vibration wave drive device using a vibrator in which an electromechanical energy conversion element is joined to a vibrating body having a plurality of protruding portions, the method including a first step and a second step. In the first step, an elastic material having a plurality of protruding portions is produced. In the second step, a pressure in a direction opposite to a protruding direction of the protruding portions of the elastic material is applied to press at least parts of the protruding portions to reduce slits between the protruding portions adjacent to each other. | 01-17-2013 |
| 310323050 | Support | 4 |
| 20100060106 | Linear planar servomotor with spare-mover standby area - A linear planar servomotor having at least one spare-mover standby area is characterized in at least one spare-mover receiving element attached to an edge of a planar stator of the linear planar servomotor for providing an upper surface of the spare-mover receiving element as the spare-mover standby area, wherein the spare-mover standby area is level with an upper surface of the stator. Thus, at least one spare mover of the linear planar servomotor can be placed on the spare-mover standby area for immediately replacing a working mover on the planar stator of the linear planar servomotor. | 03-11-2010 |
| 20110221305 | PIEZOELECTRIC MOTOR - A piezoelectric motor including a base member; a stator disposed on the base member and comprising at least one piezoelectric element; a rotor configured to rotate by a wave motion of the stator, the wave motion being generated by the piezoelectric element; a cover member attached to the base member; a bearing arranged between the cover member and the rotor; and an elastic member configured to press the rotor toward the stator. | 09-15-2011 |
| 20130221803 | NON-MAGNETIC HIGH-SPEED PIEZOELECTRIC ROTARY MOTOR - A piezoelectric motor including a rotor and a piezoelectric actuator positioned relative to the rotor in such manner that a working end of the actuator is in linear, frictional, resilient and forced contact with a working surface of the rotor. The actuator includes a piezoelectric a longitudinal prism shaped resonator with a trapezoidal cross-section and the working end of the actuator is a flat pusher insert set at an angle to the plane of the resonator base. An electronic generator is connected to electrodes of the piezoelectric actuator to excite periodic mechanical oscillations in the actuator wherein the electrodes are applied onto the longitudinal lateral trapezoidal surfaces of the resonator and the piezoelectric resonator is polarized across its width and the electronic generator outputs an alternating electrical voltage signal at a frequency matching the frequency of the first-order natural longitudinal mode of mechanical oscillation along the length of the resonator. | 08-29-2013 |
| 20160118913 | VIBRATION WAVE MOTOR AND DRIVING APPARATUS USING THE VIBRATION WAVE MOTOR - A vibration wave motor includes: a vibrating plate having a rectangular surface; a piezoelectric device bonded to the vibrating plate, and configured to vibrate at high frequency; and a projection provided to the vibrating plate or the piezoelectric device. In the vibration wave motor, a natural vibration mode, which has a resonant frequency equal to or adjacent to a resonant frequency of torsional vibration in a natural vibration mode under a state in which the vibrating plate, the piezoelectric device, and the projection are integrated, is a natural vibration mode of bending vibration in a direction parallel to or orthogonal to a torsion center axis of the torsional vibration in the natural vibration mode. The projection is provided at a position closer to an antinode than to a node, which are in the direction orthogonal to the torsion center axis of the torsional vibration in the natural vibration mode. | 04-28-2016 |
| 310323060 | Piezoelectric element or electrode | 13 |
| 20080238254 | Screw Thread Driving Polyhedral Ultrasonic Motor - A screw thread driving polyhedral ultrasonic motor includes a stator, a rotor and multiple piezoelectric plates being bonded to the stator or the rotor. The stator and the rotor have screw threads matched with each other. The stator and the rotor are connected via the screw threads. | 10-02-2008 |
| 20080297001 | Miniaturizable Motor - The invention relates to a miniaturizable motor ( | 12-04-2008 |
| 20090134744 | Ring type piezoelectric ultrasonic resonator and piezoelectric ultrasonic rotary motor using the same - A ring type piezoelectric ultrasonic resonator includes a piezoelectric ceramic segmented for each quarter of wavelength of an applied AC electric field, wherein the piezoelectric ceramic is alternately polarized in polarization units each having two segments, and a sine wave AC electric field and a sine wave AC electric field having a predetermined phase difference from the sine wave AC electric field are alternately applied to each of the segments. Further, the number of the segments of the piezoelectric ceramic is an integral multiple of 4. Moreover, the sine wave AC electric field applied to each of the segments of the piezoelectric ceramic has a phase difference of 90-degree with respect to adjacent segments. | 05-28-2009 |
| 20100007244 | Piezoelectric Motor and Method of Manufacturing the Same - A piezoelectric motor that includes a rotor and a stator having a surface on which a driving member that is in contact with the rotor for rotating the rotor is disposed. The stator includes a stator body, a plurality of piezoelectric elements disposed on a surface of the stator body, and an electrode wiring plate integrally formed with the stator body. The piezoelectric elements are electrically connected to a plurality of electrodes formed on the electrode wiring plate through a plurality of wiring lines. The wiring lines are constituted by an electroconductive film extending from a surface of the stator body to the electrodes. | 01-14-2010 |
| 20100207488 | Spherical rotary piezoelectric motor - A spherical rotary piezoelectric motor comprises a spherical rotor, a hemispherical stator, and a plurality of piezoelectric actuators. The hemispherical stator comprises an inner surface and an outer surface, wherein the inner surface forms a hemispherical hollow portion which substantially corresponds to the spherical rotor so as to contain a portion of the spherical rotor. The plurality of piezoelectric actuators is arranged on the inner surface (or the outer surface) of the hemispherical stator respectively so as to drive the hemispherical stator. The hemispherical stator generates traveling waves with a resultant elliptical motion, so the spherical rotor can be rotated accordingly with at least one degree of freedom. | 08-19-2010 |
| 20100283356 | VIBRATING BODY FOR VIBRATION WAVE DRIVE DEVICE AND METHOD OF PRODUCING VIBRATING BODY FOR VIBRATION WAVE DRIVE DEVICE - Provided is a method of producing a vibrating body for a vibration wave drive device using a vibrator in which an electromechanical energy conversion element is joined to a vibrating body having a plurality of protruding portions, the method including a first step and a second step. In the first step, an elastic material having a plurality of protruding portions is produced. In the second step, a pressure in a direction opposite to a protruding direction of the protruding portions of the elastic material is applied to press at least parts of the protruding portions to reduce slits between the protruding portions adjacent to each other. | 11-11-2010 |
| 20110025168 | VIBRATING BODY AND VIBRATION WAVE ACTUATOR - Provided are a vibrating body and a vibration wave actuator, which can suppress vibration attenuation along with a reduction in size with an inexpensive structure, to thereby improve vibration efficiency, and can output stable vibration energy. A vibrating body includes: a piezoelectric element including a piezoelectric layer and an electrode layer; a ceramic substrate to which the piezoelectric element is fixed; and a ceramic layer including the same main component as a main component of the ceramic substrate, which is provided between the piezoelectric element and the ceramic substrate, and the piezoelectric element is fixed to the ceramic substrate through intermediation of the ceramic layer. | 02-03-2011 |
| 20110133602 | PIEZOELECTRIC MOTOR - Provided is a piezoelectric motor including: a stator which includes first and second faces, wherein a plurality of piezoelectric elements are arranged on the first face, and a plurality of protrusions are formed on the second face; a rotor which is rotated by motions of waves of the stator generated by the piezoelectric elements; and a driver device which applies driving voltages to the piezoelectric elements, wherein polarization directions of the plurality of piezoelectric elements are vertical to a rotary face of the rotor. | 06-09-2011 |
| 20110215675 | Piezoelectric Oscillator and Ultrasonic Motor - A piezoelectric oscillator that generates a travelling wave using two B (1, n) mode (n is a natural number) standing waves that are out of phase with each other by 90°. On a lower surface of an oscillating body, (4/3)n piezoelectric elements are provided in order to generate an n-wave travelling wave by combining the two B (1, n) mode standing waves that are out of phase with each other by 90°. When a wavelength of the travelling wave is given by λ, each of the piezoelectric elements has a dimension in a circumferential direction occupying a central angle corresponding to (1/2)λ | 09-08-2011 |
| 20140055004 | ROTARY MOTOR SYSTEMS AND METHODS THEREOF - A rotary motor and a method of making the same include a vibrating motor body which has two orthogonal first bending modes and is substantially enclosed within a housing. A shaft is frictionally coupled to the vibrating motor body and is arranged to rotate in at least one direction about a rotation axis in response to the vibrating motor body. The shaft is frictionally coupled the vibrating motor body by a force substantially perpendicular to the rotation axis. One or more bearings support the shaft, are connected to the housing, and define the axis of rotation of the shaft. | 02-27-2014 |
| 20140125199 | PIEZOELECTRIC ELEMENT, OSCILLATORY WAVE MOTOR, AND OPTICAL APPARATUS - A piezoelectric element that can decrease the output voltage for detection relative to the input voltage for driving without requiring a step-down circuit between a detection phase electrode and a phase comparator and an oscillatory wave motor including the piezoelectric element are provided. A piezoelectric element includes a piezoelectric material having a first surface and a second surface, a common electrode disposed on the first surface, and a drive phase electrode and a detection phase electrode disposed on the second surface. An absolute value d(1) of a piezoelectric constant of the piezoelectric material in a portion (1) sandwiched between the drive phase electrode and the common electrode and an absolute value d(2) of a piezoelectric constant of the piezoelectric material in a portion (2) sandwiched between the detection phase electrode and the common electrode satisfy d(2)| 05-08-2014 | |
| 20140175946 | Ultrasonic Actuator for a Linear Ultrasonic Motor and Linear Ultrasonic Motor Having an Ultrasonic Actuator - Ultrasonic actuator ( | 06-26-2014 |
| 20150349666 | PIEZOELECTRIC ELEMENT, STATOR FOR OSCILLATORY WAVE MOTOR, OSCILLATORY WAVE MOTOR, DRIVING CONTROL SYSTEM, OPTICAL APPARATUS, AND METHOD FOR MAKING STATOR FOR OSCILLATORY WAVE MOTOR - The present invention provides a piezoelectric element that includes a piezoelectric material having first and second surfaces; a common electrode disposed on the first surface; and a plurality of drive phase electrodes, a detection phase electrode, and a non-drive phase electrode disposed on the second surface, the piezoelectric material being sandwiched between the common electrode and the electrodes on the second surface. An absolute value d(1) of a piezoelectric constant of the piezoelectric material (1) in portions sandwiched between the drive phase electrodes and the common electrode, an absolute value d(2) of a piezoelectric constant of the piezoelectric material (2) in a portion sandwiched between the detection phase electrode and the common electrode, and an absolute value d(3) of the piezoelectric material (3) in a portion sandwiched between the non-drive phase electrode and the common electrode satisfy d(2)<0.95d(1), d(3)<0.95d(1), and 0.9≦d(3)/d(2)≦1.1. | 12-03-2015 |
| 310323070 | Oval track | 1 |
| 20100117486 | POSITIONING APPARATUS AND METHOD - Positioning apparatus comprises: a first surface; a tubular body having a longitudinal axis and a first end surface at a first end of the tubular body, the first end surface being arranged in contact with the first surface; and surface wave generation means arranged to generate a first travelling surface wave on the first end surface, the first travelling surface wave travelling along a first portion of the first end surface in a first direction around the first end surface, and, while the first travelling surface wave is travelling along the first portion of the first end surface, to generate a second travelling surface wave on the first end surface, the second travelling surface wave travelling along a second portion of the first end surface in a second direction around the first end surface, the second direction being opposite to the first direction. Interaction between the first surface and the first and second travelling surface waves effects relative movement between the first surface and the tubular body. In certain embodiments the tubular body comprises piezoelectric material, and the surface waves are generated by applying voltages to electrodes. | 05-13-2010 |
| 310323080 | Armature | 2 |
| 20120146460 | VIBRATION-TYPE DRIVING APPARATUS - Provided is a vibration-type driving apparatus including: a vibration member to which an electrical-mechanical energy conversion element is fixed and which is vibrated when a driving voltage is applied to the electrical-mechanical energy conversion element; and a moving member that comes into contact with the vibration member and rotates relative to the vibration member in accordance with the vibration, wherein the moving member includes a body portion and a contacting portion with a friction surface coming into frictional contact with the vibration member, and wherein a line connecting a centroid in a cross-sectional shape of the moving member determined from the rotation axis direction of the rotation and the radial direction to an arbitrary point of the contacting portion of the moving member is parallel to direction of the vibration trajectory of the vibration member. | 06-14-2012 |
| 310323090 | Pressing means detail | 1 |
| 20100194242 | PIEZOELECTRIC ULTRASONIC MOTOR AND METHOD OF MANUFACTURING THE SAME - A piezoelectric ultrasonic motor and a method of manufacturing the piezoelectric ultrasonic motor. The piezoelectric ultrasonic motor includes: a piezoelectric body that generates a traveling wave according to an applied voltage signal; a vibrator that is attached to the piezoelectric body and vibrates; and a rotator that contacts the vibrator and is rotated by friction with the vibrating vibrator, wherein the rotator includes a plate spring member having a contact portion that contacts the vibrator, a support member that is coupled to the plate spring member and supports the plate spring member, and a buffer space defined by the plate spring member and the support member. | 08-05-2010 |
| 310323110 | Specific material or composition | 1 |
| 20100033056 | ULTRASONIC MOTOR HAVING LIGHTWEIGHT VIBRATING ELEMENT - An ultrasonic motor includes a vibrating element having a piezoelectric body attached thereto to produce a traveling wave when the piezoelectric body is supplied with an electric power, and a contacting element to come in friction contact with the vibrating element when the vibrating element is vibrated by the traveling wave. The vibrating element is formed of a Mg-based alloy having a Mg content of more than 85% by weight. | 02-11-2010 |
