Stator Patents (Class 310/323.04)
  • Patent number: 9919341
    Abstract: The invention provides an ultrasonic motor, which is an ultrasonic motor provided on a shaft end of a rotation shaft. An output shaft of the ultrasonic motor is connected to the rotation shaft, a stator is rotatably provided on the output shaft, a rotor is fixed to the rotation shaft, a vibration generating component for generating an ultrasonic vibration is provided on either one of the rotor or the stator. A whirl-stop unit is provided between the stator and a fixed side for supporting the rotation shaft: the whirl-stop unit has a joint holder provided on the fixed side and a connection element provided on the stator: the joint holder has a ball holder for pressing a metal ball to the connection element in a circumferential direction and a connection pin holding the connection element between the ball holder and the connection pin, spanning over the joint holder and capable of tilting.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: March 20, 2018
    Assignee: TOPCON Corporation
    Inventors: Yoshihiko Tokuda, Satoshi Nakamura, Yosuke Okudaira
  • Patent number: 9577550
    Abstract: Provided is a vibration actuator including: an electromechanical transduction member that transduces electric power to a mechanical vibration; a transmission member that transmits the vibration from the electromechanical transduction member as a driving force; and an abutting portion that abuts on the transmission member and moves relative to the transmission member in response to the driving force. One of the transmission member and the abutting portion includes pores in its surface contacting the abutting portion or the transmission member at an area occupancy of 2% or higher. In this vibration actuator, the average area of the pores may be 3 ?m2 or larger. The other of the transmission member and the abutting portion may include iron in its surface contacting the one.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: February 21, 2017
    Assignee: NIKON CORPORATION
    Inventors: Makoto Nakazumi, Masaaki Tanabe
  • Patent number: 9401666
    Abstract: A vibration actuator that is easy to manufacture and has good driving performance, and a lens-barrel and a camera provided with the same. The vibration actuator is provided with an oscillator that generates oscillations; and a relative movement member that is pressure contacts the oscillator, and moves relative to the oscillator due to the oscillation. Either a contact face of the oscillator with respect to the relative movement member or a contact face of the relative movement member with respect to the oscillator is a thermosetting resin film that is formed of polyamide-imide resin and fluororesin, and the other contact face is an anodic oxide film.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: July 26, 2016
    Assignee: NIKON CORPORATION
    Inventors: Mina Kobayashi, Mamoru Inoue
  • Patent number: 9188931
    Abstract: For example, the present invention relates to a vibration type driving apparatus which includes: a vibrating body that includes an elastic body provided with a vibrating portion, and an electrical-mechanical energy converting element fixed to the elastic body; and a driven body in pressure contact with a frictional portion of the vibrating portion, wherein the vibrating body and the driven body are relatively moved by driving vibration generated when an alternating voltage is applied to the electrical-mechanical energy converting element; the elastic body includes a fixing portion for fixing the vibrating body to another member, and a connecting portion for connecting the vibrating portion and the fixing portion; and the connecting portion includes plural uneven rigidity components in a circumferential direction.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: November 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Satoshi Tsuchiya
  • Patent number: 8912706
    Abstract: An oscillatory wave motor includes an oscillator having an oscillation body and an electro-mechanical energy-converting element, and a flexible heat-conducting member configured to dissipate heat generated by the oscillatory wave motor. The oscillatory wave motor drives a moving body in contact with a contact portion formed in the oscillation body by an elliptical movement of the oscillator, and the heat-conducting member is provided in addition to a heat-conducting path that conducts heat generated by the oscillatory wave motor through an oscillator supporting member that supports the oscillator or a heat-conducting path that conducts heat through the moving body.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: December 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hajime Kanazawa
  • Patent number: 8749118
    Abstract: A vibrating actuator assembly includes a diaphragm, at least one vibrator at the diaphragm and that vibrates when an electric signal is applied thereto, a vibration shaft having one end connected to the diaphragm, a rotor on an outer side of the vibration shaft to contact an outer surface of the vibration shaft and that moves by vibration of the vibration shaft, and an elastic presser at another end of the vibration shaft and that elastically presses the rotor toward the diaphragm.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: June 10, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Cheol-eun Jang, Chan-young Moon, Sung-wook Choi, Woo-jong Cho
  • Patent number: 8674586
    Abstract: A motor device includes a rotor, a transmission member wound around at least a portion of an outer periphery of the rotor, a moving part connected to the transmission member to move the transmission member, and a control unit which makes the moving part perform the driving operation of moving the transmission member by a predetermined distance in a state where a torque transmission state is brought between the rotor and the transmission member, and the returning operation of returning the transmission member to a predetermined position in a state where the torque transmission state is released.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: March 18, 2014
    Assignee: Nikon Corporation
    Inventor: Akimitsu Ebihara
  • Patent number: 8531086
    Abstract: A vibration actuator 10 comprises an elastic body 12 that generates vibration waves in accordance with driving of an element 13, and a relative movement member that is in pressure contact with the body 12 and is relatively moved with respect to the body 12 by the vibration waves. A plurality of groove 30s are formed at the relative movement member side of the body 12, and depths of the groove 30s in a direction orthogonal to a relative movement direction of the relative movement member vary along the relative movement direction of the relative movement member.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: September 10, 2013
    Assignee: Nikon Corporation
    Inventor: Toshikazu Morioke
  • Patent number: 8487512
    Abstract: An oscillatory wave motor includes an oscillator having an oscillation body and an electro-mechanical energy-converting element, and a flexible heat-conducting member configured to dissipate heat generated by the oscillatory wave motor. The oscillatory wave motor drives a moving body in contact with a contact portion formed in the oscillation body by an elliptical movement of the oscillator, and the heat-conducting member is provided in addition to a heat-conducting path that conducts heat generated by the oscillatory wave motor through an oscillator supporting member that supports the oscillator or a heat-conducting path that conducts heat through the moving body.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: July 16, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hajime Kanazawa
  • Publication number: 20130015746
    Abstract: 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.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 17, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Jun Tamai
  • Patent number: 8344591
    Abstract: Provided is a vibration actuator comprising an elastic body; an electromechanical transducer that causes the elastic body to vibrate; and a rotating body that rotates in response to a drive force received from contact with the elastic body at a vibrational antinode thereof, wherein the rotating body contacts the elastic body at a prescribed position along a direction in which an axis of the rotation extends. In the vibration actuator, the elastic body includes an elastic body contact member that is arranged in a region that includes the vibrational antinode of the elastic body, the rotating body includes a rotating body contact member that receives a drive force by contacting the elastic body contact member, and one of the elastic body contact member and the rotating body contact member has a contact surface that is oriented diagonally to the axis of rotation and contacts the other of the elastic body contact member and the rotating body contact member.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: January 1, 2013
    Assignee: Nikon Corporation
    Inventors: Yoshihiko Suzuki, Eiji Matsukawa, Kazuyasu Oone, Masaaki Tanabe
  • Patent number: 8339016
    Abstract: A vibration wave driving device comprises a vibrator having an electromechanical conversion device, a supporting member for supporting the vibrator, and a driven member brought into contact with a part of the vibrator driven frictionally by vibration excited in the vibrator: the supporting member comprising a vibration portion vibrating together with the vibrator, a fixation portion for fixing the supporting member, and a support portion for connecting the vibration portion with the fixation portion and supporting the vibrator; and the support portion being comprised of a laminate of sheets.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: December 25, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Seki, Takayuki Tsukimoto
  • Patent number: 8330327
    Abstract: 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 ?, each of the piezoelectric elements has a dimension in a circumferential direction occupying a central angle corresponding to (1/2)??, and a plurality of piezoelectric elements are spaced apart from each other at intervals each occupies a central angle corresponding to (1/4)??.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: December 11, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Hiroshi Asano
  • Patent number: 8330326
    Abstract: 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.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: December 11, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Katsumi Fujimoto, Hiroshi Asano
  • Patent number: 8294335
    Abstract: Elliptical vibrations are generated by combining longitudinal primary resonance vibrations resulting from expansion and contraction of a vibrator in a direction of a central axis and torsional secondary resonance vibrations or torsional tertiary resonance vibrations resulting from twisting of the vibrator around the central axis. A dimension ratio of a rectangle of the vibrator is set such that a resonance frequency of the longitudinal primary resonance vibrations and a resonance frequency of the torsional secondary resonance vibrations or the torsional tertiary resonance vibrations almost match. The vibrator includes a plurality of piezoelectric sheets. The longitudinal primary resonance vibrations and the torsional secondary resonance vibrations or the torsional tertiary resonance vibrations are generated because of formation of activation regions by polarization in a thickness direction of the piezoelectric sheets.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: October 23, 2012
    Assignee: Olympus Corporation
    Inventor: Hiroyuki Takizawa
  • Patent number: 8237331
    Abstract: The drive efficiency of a vibratory actuator is improved without increasing a weight of a driver element. An ultrasonic actuator (2) includes an actuator body (4) for generating longitudinal vibration and bending vibration, and driver elements (8), provided on a mounting surface (40a) which is one of side surfaces of the actuator body (4), for making an orbit motion according to the vibrations of the actuator body (4) to output driving force. In the driver element (8), a through hole (80) is provided.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: August 7, 2012
    Assignee: Panasonic Corporation
    Inventors: Eiichi Nagaoka, Yusuke Adachi
  • Patent number: 8237330
    Abstract: A vibrating element of an ultrasonic motor includes a vibrating member, and a piezoelectric body to produce a traveling wave thus to vibrate the vibrating member when electric power is applied to the piezoelectric body. The piezoelectric body includes a first piezoelectric layer attached to the vibrating member and in which positive poles and negative poles are alternately polarized, a second piezoelectric layer attached to the first piezoelectric layer and in which positive poles and negative poles are alternately polarized, a plurality of electrodes formed on opposite surfaces of the first and second piezoelectric layers, and an electrode connecting part formed on outer circumferential surfaces of the first and second piezoelectric layers to selectively connect the plurality of electrodes to one other.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: August 7, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-woo Cho, Ji-hyuk Lim, Sung-hyuk Park
  • Patent number: 8183740
    Abstract: A piezoelectric motor (100) includes a stator (2) having a stator shaft (9). The motor also includes an annular piezoelement (4) having upper and lower surfaces and inner and outer rims retained on the stator. The motor further includes an annular wave shell (6) on an outer rim of the piezoelement and a rotor coupled to the stator shaft, where the rotor has a rotor inner circumferential surface (20). The motor additionally includes elastic pushers (8), each having an end coupled to the wave shell and another end extending to and contacting the rotor inner circumferential surface. In the motor, a radius of the outer rim is at least twice the radius of the inner rim and an annular width of the piezoelement is at least twice its thickness.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: May 22, 2012
    Assignee: Discovery Technology International, Inc.
    Inventors: Serhiy Petrenko, Valentin Rangelov Zhelyaskov
  • Patent number: 8183742
    Abstract: Piezoelectric motor that provides high speed and bi-directional operation. A first rotor is disposed about a first shaft, and a second rotor separate from the first rotor is disposed about the first shaft and a second shaft. Each of the rotors and shafts are centered on a common axis. An annular shaped first piezoelement is centered on the axis and fixed to the housing. First and second annular piezoelements are disposed within the first rotor, configured to motivate rotation of the second shaft in a first rotation direction when stimulated with a first exciter voltage. The third and fourth piezoelement are disposed within the second rotor, configured to motivate rotation of the second shaft in a second direction (opposed from the first direction) when stimulated with an exciter voltage.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: May 22, 2012
    Assignee: Discovery Technology International, Inc.
    Inventors: Valentin R. Zhelyaskov, Serhiy Petrenko
  • Patent number: 8063538
    Abstract: An ultrasonic motor includes a stator and a rotor. In the stator, an n number of piezoelectric elements (wherein n is a natural number) are affixed to one surface of a vibrating member, whose outer circumferential edge is circular or polygonal, along a direction in which the outer circumferential edge extends. Each of the piezoelectric elements has a size corresponding to ??/2 in terms of center angle, and the piezoelectric elements that are adjacent to each other are disposed so as to be separated by an interval corresponding to ??/4 in terms of the center angle along a circumferential direction of the vibrating member. The piezoelectric elements are polarized in opposite directions in a thickness direction. The rotor is disposed so as to contact the stator, and is rotated by receiving vibration resulting from a 3n-wave traveling wave generated by the stator.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: November 22, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Hiroshi Asano
  • Publication number: 20110280559
    Abstract: A vibrational wave motor which can realize a suitable drive performance and can be driven quietly. A vibrational wave motor having: an electromechanical-conversion element excited by a driving signal; a vibrating element joined with the electromechanical-conversion element, and having a drive surface where a progressive vibrational wave is generated by the excitation; a relative motion member having a sliding surface pressure-contacting the drive surface of the vibrating element, and which is driven by the wave; and a driving device for providing the driving signal to the electromechanical-conversion element, wherein: the driving device provides the driving signal to the electromechanical-conversion element, the driving signal generating the wave satisfying a-value/??0.00025 in the drive surface, where a vibration amplitude generated in the drive surface of the vibrating element is a-value, and a wavelength generated in the drive surface of the vibrating element is ?.
    Type: Application
    Filed: January 28, 2011
    Publication date: November 17, 2011
    Applicant: NIKON CORPORATION
    Inventors: Takatoshi ASHIZAWA, Toshikazu MORIOKE
  • Patent number: 8035276
    Abstract: 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.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: October 11, 2011
    Assignee: Nikon Corporation
    Inventor: Takatoshi Ashizawa
  • Patent number: 8018124
    Abstract: A piezoelectric motor including a rotor, a stator including a piezoelectric material having axial polarization, the stator including at least three pairs of electrodes spaced from one another on a top end face thereof and a common electrode on a base end face thereof, and slabs affixed to the stator at spacings between the electrodes, wherein the rotor is pressed towards the slabs by a pre-load force, wherein when a positive charge is applied to a first of the electrodes and a negative charge is applied to a second of the electrodes and an electric common port is applied to the common electrode, D33 piezoelectric phenomenon is created, thereby causing the spacings between the electrodes to bend and the slabs to tilt, thus applying a frictional pushing side force against the rotor to cause the rotor to rotate.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: September 13, 2011
    Assignee: Pinanotech (Piezo-Nano Technology) Ltd.
    Inventor: Benny Gaber
  • Patent number: 8013495
    Abstract: A stator and a piezo ultrasonic motor including the same. The piezo ultrasonic motor includes a stator including an elastic body having a flat portion at its outer surface and a central hole penetrating the center of the stator with a predetermined size, and a piezoelectric body including a first internal piezoelectric body and a second internal piezoelectric body integrally disposed parallel to each other in a longitudinal direction of the flat portion and providing an external force deforming the elastic body when an AC voltage is applied, a rotor inserted in the central hole and including a contact frictionally contacting an inner surface of the central hole, an elastic part providing an elastic force maintaining close attachment of the contact to the stator. Accordingly, the manufacturing cost decreases by reducing the number of elements and simplifying a structure, and a stable driving characteristic can be achieved.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: September 6, 2011
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Burhanettin Koc
  • Patent number: 8008841
    Abstract: A stator and a piezo ultrasonic motor including the same. The piezo ultrasonic motor includes a stator including an elastic body having a flat portion at its outer surface and a central hole penetrating the center of the stator with a predetermined size, and a piezoelectric body including a first internal piezoelectric body and a second internal piezoelectric body integrally disposed parallel to each other in a longitudinal direction of the flat portion and providing an external force deforming the elastic body when an AC voltage is applied, a rotor inserted in the central hole and including a contact frictionally contacting an inner surface of the central hole, an elastic part providing an elastic force maintaining close attachment of the contact to the stator. Accordingly, the manufacturing cost decreases by reducing the number of elements and simplifying a structure, and a stable driving characteristic can be achieved.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: August 30, 2011
    Assignee: Samsung Electro—Mechanics Co., Ltd.
    Inventor: Burhanettin Koc
  • Patent number: 7990020
    Abstract: The present invention provides an ultrasonic motor including a wire having a coiled stator at one end thereof, a vibration generating device disposed at another end of the wire, a moving member that is in contact with the stator, a guide member that guides the rotation of the moving member, and an elastic member that covers the periphery of the wire. Accordingly, the driving efficiency of the ultrasonic motor that has a simple structure and that can be easily downsized can be enhanced and the performance stability thereof can be realized.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: August 2, 2011
    Assignee: Seiko Instruments Inc.
    Inventors: Akihiro Iino, Makoto Suzuki
  • Patent number: 7948149
    Abstract: A stator and a piezo ultrasonic motor including the same are provided. The piezo ultrasonic motor includes a stator including an elastic body having a flat portion at its outer surface and a central hole penetrating the center of the stator with a predetermined size, and a piezoelectric body including a first internal piezoelectric body and a second internal piezoelectric body integrally disposed parallel to each other in a longitudinal direction of the flat portion and providing an external force deforming the elastic body when an AC voltage is applied, a rotor inserted in the central hole and including a contact frictionally contacting an inner surface of the central hole, an elastic part providing an elastic force maintaining close attachment of the contact to the stator. Accordingly, the manufacturing cost decreases by reducing the number of elements and simplifying a structure, and a stable driving characteristic can be achieved.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: May 24, 2011
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Burhanettin Koc
  • Patent number: 7923898
    Abstract: A piezo drive system includes an elastic fixing frame, a drive element, a rod, and a rotor. A vamplate portion is formed on the outer surface of the rod. One end of the rod is secured to around the center of a face of the drive element. The rotor consists of a cylindrical portion and a disk portion, and can rotate relative to the rod. Protrusions are formed on the inside of a top surface portion of the fixing frame to push against the disk portion. Using the drive element, the rod rotates while tilting and makes a surface contact with the vamplate portion, producing friction. Consequently, the rotor is rotated.
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: April 12, 2011
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Yutaka Doshida, Taisei Irieda
  • Patent number: 7902723
    Abstract: 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.
    Type: Grant
    Filed: November 16, 2006
    Date of Patent: March 8, 2011
    Assignee: Tsinghua University
    Inventors: Tieying Zhou, Cunyue Lu, Yu Chen, Deyong Fu, Xiaoping Hu, Yi Li, Bin Tian, Zhengping Wang
  • Patent number: 7851972
    Abstract: It is an subject of the present invention to provide a vibration actuator in which a plurality of rotors can be driven by a single vibration unit. When a composite vibrator (2) is driven to generate a composite vibration combining a plurality of vibrations, a first stator (3) and a second stator (4) vibrate, thereby causing elliptical movements in corner portions (8) and (9) of the first stator (3) and the second stator (4), respectively. As a result, a first rotor (A) abutting onto and pressurized against the corner portion (8) of the first stator (3) and a second rotor (B) abutting onto and pressurized against the corner portion (9) of the second stator (4) are rotated at the same time. Further, in this case, by selecting vibration modes of the plurality of vibrations constituting the composite vibration, the two rotors (A) and (B) can be rotated in the same direction or in opposite directions with respect to each other.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: December 14, 2010
    Assignees: Kabushiki Kaisha Toyota Jidoshokki, Tokyo Institute of Technology
    Inventors: Masaki Takasan, Hirohiko Ishikawa, Kazuo Seiki, Kentaro Nakamura, Sadayuki Ueha
  • Patent number: 7834516
    Abstract: A piezoelectric ultrasonic motor includes a piezoelectric stator including a hollow metal tube having a quadrangular cross section and four piezoelectric elements each installed in each outer face of the metal tube; a rotary shaft including a rotation bar inserted into an inner space of the metal tube, an upper rotation member provided around the rotation bar in contact with an upper surface of the piezoelectric stator, the rotation member rotating in response to the strain of the piezoelectric stator, a lower rotation member adapted to restrain the rotation of the rotation bar and contacting a lower surface of the piezoelectric stator and a power transmission member provided at one portion of the rotation bar to transmit the rotation of the rotation member to an object to be transported; and a power supply to apply a supply voltage necessary for the actuation of the piezoelectric stator.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: November 16, 2010
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byung Woo Kang, Burhanettin Koc, Jung Ho Ryu, Sang Min On, Dong Kyun Lee
  • Patent number: 7825566
    Abstract: Provided are an ultrasonic actuator and a method for manufacturing an piezoelectric deformation portion in which wiring a drive circuit can be easily processed, and in which productivity can be increased. The ultrasonic actuator comprises: a triangular vibrating member which has a piezoelectric deformation portion which is deformed by driving signals; a moving member that is pressure-contacted to at least one of the vertices of the vibrating member and generates a movement relative to the vibrating member; and a plurality of external electrodes integrally provided on one side surface of the vibrating member; wherein the piezoelectric deformation portion is formed by alternately laminating piezoelectric layers made of piezoelectric material and internal electrode layers including internal electrodes, and the plurality of external electrodes interconnect the internal electrodes in a prescribed combination.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: November 2, 2010
    Assignee: Konica Minolta Opto, Inc.
    Inventor: Takashi Matsuo
  • Patent number: 7816839
    Abstract: An ultrasonic linear motor includes a substrate; a vibrator disposed on the substrate having an oblique or curved face at two sides thereof forming concave receiving portions with the surfaces of the substrate; and a slider having clamping portions at two sides thereof for correspondingly clamping to the receiving portions, wherein the vibrator is for generating a driving force to the slider while connecting with a power supply, such that the clamping portions of the slider move within the receiving portions, thereby generating a linear translation. The present invention adopts a simple structure having few elements that enables easy manufacturing and integration with other elements, thus reducing manufacturing cost.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: October 19, 2010
    Assignee: Industrial Technology Research Institute
    Inventors: Yi-Cheng Chen, Yu-Jen Wang, Chien Li, Chien-Shien Yeh
  • Patent number: 7732981
    Abstract: 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.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: June 8, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-hyuk Lim, Jin-woo Cho, Sung-hyuk Park
  • Patent number: 7728488
    Abstract: A piezoelectric motor has a stator module (1), comprising two pairs of piezoelectric actuators (1a, 1b) and (2a, 2b) inside this stator module. The stator module is fixed by a central fixing point (A). The piezoelectric actuators (1a, 1b, 2a, 2b) are connected to the stator module via flexible or biasing elements (3), such as for instance hinges, for instance elastic hinges. The stator module (1) comprises a tuning mechanism (4), comprising at least one mass (4a, 4b) and at least one flexible or biasing element (5a, 5b, 5c, 5d), for instance leaf springs. The stator module (1) is contacted to a driven part (6), for instance a slider, at the contact point (A). The piezoelectric motor is designed such that contact point (B) is able to produce a closed trajectory, thereby inducing a relative motion of the driven part (6). The contact point (B) is moved by applying an electric field to actuators (1a and 1b) and/or by applying an electric field to actuators (2a and 2b).
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: June 1, 2010
    Assignee: Katholieke Universiteit Leuven
    Inventors: Dominiek Reynaerts, Hendrik Van Brussel, Wim Van De Vijver
  • Patent number: 7723900
    Abstract: An electro-mechanical wave device which may be used for movement of a mechanical member, e.g. by friction, a motor comprising one or more wave devices, and a method of providing the electro-mechanical wave device. The electro-mechanical wave device comprises a substrate comprising a plurality of conductors, and a plurality of actuators positioned on the substrate for generation of mechanical waves along a predetermined propagation path, each of the actuators being connected to a respective set of the conductors of the substrate for reception of an excitation signal transmitted by the set of conductors.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: May 25, 2010
    Assignee: PCB Motor APS
    Inventors: Henning Ellesgaard, Elvind Johansen, Tom Olesen, Henrik Andersen, Morten Hartvig Hansen
  • Patent number: 7671513
    Abstract: A motor (1) includes a stator (4) and a rotor (6), the stator including piezoelectric actuators (11,12,21) for maneuvering staples (30A, 30Z) maintaining the stator and its linear displacement (L) along a guide (2), the actuators serving to drive the rotor in rotation (R).
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: March 2, 2010
    Assignees: Centre National de la Recherche Scientifique, Institut National Polytechnique de Toulouse
    Inventors: Marc René Christian Budinger, Jean-Francois Roland Rouchon, Bertrand Nogarede
  • Patent number: 7638926
    Abstract: A piezoelectric ultrasonic motor includes a piezoelectric stator including a metal tube with an inner space and piezoelectric elements mounted on the outer circumference of the metal tube, a rotary shaft including a rotation bar inserted into the inner space of the metal tube, and a rotation member provided around the rotation bar in contact with the piezoelectric stator. The piezoelectric stator strains with an electric field applied thereto, and the rotation member rotates in response to the strain of the piezoelectric stator. A power transmission member is provided at one portion of the rotation bar to transmit the rotation of the rotation member to an object to be transported. With face contact the motor achieves stable actuation together with enhanced force and sufficient strain, and a flexibility to be applied to various apparatuses such as a camera module.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: December 29, 2009
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byung Woo Kang, Burhanettin Koc, Jung Ho Ryu, Sang Min On, Dong Kyun Lee
  • Patent number: 7638932
    Abstract: Internal electrode layers (5) include a common electrode layer (3) and feed electrode layers (6) alternately placed in a stacking direction with piezoelectric layers (1) interposed between the common electrode layer (3) and the feed electrode layers (6). The common electrode layer (3) has a common electrode (3a). The feed electrode layers (6) include a first feed electrode layer (6a) and a second feed electrode layer (6b). The first feed electrode layer (6) has four divided electrodes (2a through 2d) and a first connection electrode (2e) for providing connection between two of the divided electrodes (2b, 2d). The second feed electrode layer (6) has four divided electrodes (4a through 4d) and a second connection electrode (4e) for providing connection between two of the divided electrodes (4a, 4c).
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: December 29, 2009
    Assignee: Panasonic Corporation
    Inventor: Yusuke Adachi
  • Patent number: 7619348
    Abstract: An oscillatory wave motor, a lens barrel, and a camera system are provided, which have long service lives and which are stable. An oscillatory wave motor includes an oscillator which generates oscillation on an elastic member in accordance with excitation of an electromechanical conversion element, and a relative movement member which is pressurized to make contact with the oscillator and which moves relative to the oscillator in accordance with the oscillation. The oscillatory wave motor has an epoxy resin film formed of silicon beads and an epoxy resin and which is formed on at least one of frictional contact surfaces of the oscillator and the relative movement member.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: November 17, 2009
    Assignee: Nikon Corporation
    Inventors: Mina Kobayashi, Mamoru Inoue
  • Patent number: 7608981
    Abstract: The invention relates to a piezoelectric thin film vibrator having a piezoelectric device formed by using thin film formation technology, a fabrication method thereof, a driving apparatus and a piezoelectric motor using the same, and an object is to provide a piezoelectric thin film vibrator which can provide an excellent piezoelectric characteristic at low cost, a fabrication method thereof, a driving apparatus and a piezoelectric motor using the same. A piezoelectric thin film vibrator is configured to have a resonator which generates a flexure traveling wave, a lower electrode which is formed on the resonator, a piezoelectric thin film which is formed by epitaxial growth on the lower electrode, and a plurality of upper electrode parts which is formed on the piezoelectric thin film.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: October 27, 2009
    Assignee: TDK Corporation
    Inventors: Ken Unno, Kenichi Tochi, Masahiro Miyazaki
  • Patent number: 7602103
    Abstract: The present invention relates to an ultrasonic motor comprising a stator formed by using an acoustic waveguide of helical coil shape or an acoustic waveguide of in-plane spiral coil shape, so that a rotor placed in close proximity to, or in close contact with the coil is rotated, traveled, or performed curved line movement by the propagation of the wave on the stator, thereby eliminating the provision of a preload spring and an absorber, simplifying the structure of the motor, reducing the size of the motor, and enabling to work in a liquid environment without water proofing and rotation of a hollow tube.
    Type: Grant
    Filed: April 27, 2005
    Date of Patent: October 13, 2009
    Inventors: Tadashi Moriya, Yuji Furukawa
  • Patent number: 7456547
    Abstract: An ultrasonic motor is provided with a circular stator including a piezoelectric element and a comb teeth body with a multitude of comb teeth circumferentially aligned thereon, and a circular rotor supported by a rotating shaft and pressed against the comb teeth body, wherein the comb teeth respectively include, at least in a portion thereof press-contacting the rotor, a plurality of pin-shaped elements radially aligned at a predetermined interval. The pin-shaped element is elastically deformable in a radial direction at least in a tip portion thereof, and has a predetermined rigidity in a circumferential direction.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: November 25, 2008
    Assignee: Hoya Corporation
    Inventor: Yuichi Kurosawa
  • Patent number: 7402935
    Abstract: An ultrasonic motor is provided with a circular stator including a piezoelectric element and a comb teeth body and a circular rotor supported by a rotating shaft and disposed in close contact with the comb teeth body. The stator and the rotor are magnetized in opposite polarities to each other so that the stator and the rotor are brought into close contact by an attractive magnetic force generated therebetween in an axial direction.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: July 22, 2008
    Assignee: Hoya Corporation
    Inventor: Yuichi Kurosawa
  • Publication number: 20080169726
    Abstract: The present invention provides an ultrasonic motor including a wire having a coiled stator at one end thereof, a vibration generating device disposed at another end of the wire, a moving member that is in contact with the stator, a guide member that guides the rotation of the moving member, and an elastic member that covers the periphery of the wire. Accordingly, the driving efficiency of the ultrasonic motor that has a simple structure and that can be easily downsized can be enhanced and the performance stability thereof can be realized.
    Type: Application
    Filed: December 4, 2007
    Publication date: July 17, 2008
    Inventors: Akihiro Iino, Makoto Suzuki
  • Patent number: 7355325
    Abstract: An electromechanical motor (1), using at least two bimorph, monomorph or multimorph electromechanical actuating elements (6) interconnected by a common actuator backbone (5) is disclosed. The actuating elements (6) are controllable in both a longitudinal direction (L), i.e. in the main extension direction of the actuating element (6), and a flexural direction, i.e. bending of the actuating element (6), separately. The different actuating elements (6) can be controlled individually as well. The actuator (3) dimensions are preferably selected to resonance frequencies in vicinity of a certain frequency. The actuating elements (6) are provided with interaction portions (7) at which any contact between the actuator and a body (2) to be moved is made. In order to operate well both in fine-positioning and resonant motion, the interaction portions (7) are arranged to partially suppress the transfer of acoustic waves between the actuating elements (6) and the body (2) to be moved.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: April 8, 2008
    Assignee: Piezomotor Uppsala AB
    Inventors: Stefan Johansson, Johan Abrahamsson, Robert Sunnerberg
  • Patent number: 7312559
    Abstract: The present invention relates to a ceramic tube type ultrasonic motor having a stator including a tube-type elastic body that is formed of a ceramic material; and a plurality of piezoelectric diaphragms that are attached on the outer peripheral surface of the elastic body in a longitudinal direction thereof and to which voltages having a phase difference are respectively applied and a rotor that is rotated by the friction with the elastic body flexurally vibrating due to the voltages applied to the plurality of piezoelectric diaphragms.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: December 25, 2007
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Dong Kyun Lee, Burhanettin Koc, Byung Woo Kang
  • Patent number: 7307372
    Abstract: A rotary ultrasonic piezoelectric motor is provided and a method of exciting a flexure traveling wave to drive the motor. The motor includes a stator having a piezoelectric ceramic disc polarized in the radial direction and bounded by a top electrode and a segmented bottom electrode. The motor also includes a power source for applying two pairs of alternating voltages to the bottom electrode segments to excite a shear-shear mode vibration in the stator, resulting in a shear-shear mode flexure traveling wave in the stator. The motor further includes a rotor operatively connected to the stator, and the stator is driven to rotate through a frictional force between the rotor and the stator due to the traveling wave deformation of the stator. A linear ultrasonic piezoelectric motor and method of exciting a flexure traveling wave to linearly drive the motor is provided. The motor includes a stator having a rectangular piezoelectric ceramic plate that is polarized in the longitudinal direction.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: December 11, 2007
    Assignee: The Penn State Research Foundation
    Inventors: Kenji Uchino, Shuxiang Dong, Michael T. Strauss
  • Publication number: 20070170817
    Abstract: A piezoelectric/electrostrictive device has a rotor substantially in the form of a rectangular parallelepiped, and a rotary actuator for angularly displacing the rotor 12. The rotary actuator includes a stationary member, a first vibratory plate and a second vibratory plate extending in one direction from opposite sides of the stationary member, a first piezoelectric/electrostrictive element for actuating the first vibratory plate, and a second piezoelectric/electrostrictive element for actuating the second vibratory plate. The rotor includes a pair of opposite surfaces, one of the surfaces having a first end secured to an end of the first vibratory plate and a second end, which is diagonally opposite to the first end, and which is secured to an end of the second vibratory plate.
    Type: Application
    Filed: January 19, 2007
    Publication date: July 26, 2007
    Applicant: NGK Insulators, Ltd.
    Inventors: Koji IKEDA, Kazuyoshi Shibata, Nobuo Takahashi
  • Patent number: 7245061
    Abstract: A micro-beam friction liner adapted to increase performance and efficiency and reduce wear in a piezoelectric motor or actuator or other device using a traveling or standing wave to transfer energy in the form of torque and momentum. The micro-beam friction liner comprises a dense array of micro-beam projections having first ends fixed relative to a rotor and second ends projecting substantially toward a plurality of teeth of a stator, wherein the micro-beam projections are compressed and bent during piezoelectric movement of the stator teeth, thereby storing the energy, and then react against the stator teeth to convert the stored energy stored to rotational energy in the rotor.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: July 17, 2007
    Assignee: Honeywell Federal Manufacturing & Technologies, LLC
    Inventor: Charles Mentesana