Traveling Wave Motor Patents (Class 310/323.03)
  • Patent number: 11218089
    Abstract: A rotary ultrasonic motor includes an ultrasonic actuator, a driven element, an inner casing member and an outer casing member. A piezoelectric or electrostrictive or magnetostrictive material is arranged between an excitation electrode and at least one general electrode. The ultrasonic actuator is between the inner and outer casing members of a casing, and is directly or indirectly in contact with the element to be driven, so that periodic deformations generated in the ultrasonic actuator by electrical excitation are transferable to the drive element. The ultrasonic actuator is mounted by a retaining device arranged on the casing with at least one retaining section which engages in a recess associated with a respective retaining section.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: January 4, 2022
    Assignee: PHYSIK INSTRUMENTE (PI) GMBH & CO. KG
    Inventors: Burhanettin Koc, Thomas Polzer
  • Patent number: 10917024
    Abstract: A vibration-type drive apparatus, which increases productivity and also prevents undesired vibration from occurring during operation, includes an elastic body, a vibrating body having an electro-mechanical energy conversion element mounted on the elastic body, a driven body that is brought into pressure contact with the vibrating body, and a pressurizing member that brings the driven body into pressure contact with the vibrating body. Relative positions of the vibrating body and the driven body change due to vibrations excited in the vibrating body. The pressurizing member has a positioning portion, and the driven body has a fitting-receiving portion that is to be fitted onto the positioning portion. During operation, the positioning portion and the fitting-receiving portion are not in contact with each other.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: February 9, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kei Suefuji
  • Patent number: 10903763
    Abstract: A built-in piezoelectric type online dynamic balance actuator which includes two structurally identical left and right piezoelectric drive adjustment mechanisms at two sides of a housing. The piezoelectric drive adjustment mechanism includes a shaft having one end supported inside a housing chamber by bearing, a middle portion connected to an end cover by bearing, and the other end supported on bearing housing by bearing, a weight mass coupled to the shaft and positioned inside a tightening sleeve with one side connected to the bearing housing and another side connected to the end cover and the housing, and a stator fixedly connected to one side of the end cover, a mover pressed against a surface of the stator through a disk. Through a control center, the mass weights of the left and right piezoelectric drive adjustment mechanisms are fixed to a preset angle.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: January 26, 2021
    Inventors: Xuesong Mei, Xialun Yun, Gedong Jiang, Jiachun Deng, Tao Tao, Muxun Xu
  • Patent number: 10473925
    Abstract: A self-cleaning lens system disposed adjacent a camera is disposed. The system may incorporate a piezoelectric (PZT) lens system having a first PZT element secured to a first peripheral portion of the lens element, which may be responsive to an alternating current (AC) signal applied to the first PZT element. An AC signal may excite the first PZT element to cause shear displacements in opposite longitudinal directions and to create an oscillating shear motion for the first PZT element. The oscillating shear motion may cause an oscillating rotational movement of the lens element that removes the environmental element from a surface of the lens element.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: November 12, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Michael D. Alarcon, Norman J. Weigert, Dan W. Mepham, Hongguang Sun
  • Patent number: 10439518
    Abstract: A vibration-type actuator that is capable of reducing an unnecessary vibration during driving includes a vibration body configured by connecting an electro-mechanical energy conversion element and an elastic body. A driven body is in pressure contact with the vibration body. A controller moves the vibration body and the driven body relatively by a vibration that is excited in the vibration body by applying driving voltage to the electro-mechanical energy conversion element so that a difference between a resonance frequency in a natural vibration mode of the vibration body that is higher than an upper limit frequency of a predetermined driving frequency range and that is nearest to the upper limit frequency and a frequency of the driving voltage is greater than a difference between a resonance frequency in a natural vibration mode used for moving the vibration body and the driven body relatively and the frequency of the driving voltage.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: October 8, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kei Suefuji, Atsushi Kimura, Takao Mori, Satoshi Tsuchiya, Akira Shimada
  • Patent number: 10425019
    Abstract: A motor includes a first vibrator, a plurality of biasing parts that are disposed around the first vibrator and that presses the first vibrator onto a contacting member in contact with the first vibrator, a first pressing member that is biased by the plurality of biasing parts and that includes a pressing part pressing the first vibrator by biasing force of the plurality of biasing parts, and a second pressing member that is biased by the plurality of biasing parts. The first vibrator and the contacting member move relatively by vibrations that occur in the first vibrator. The first and second pressing members integrally moves while the first vibrator moves. The first pressing member and the first vibrator are tiltable around a first direction orthogonal to both of a moving direction of the first vibrator and a biasing direction of the plurality of biasing parts.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: September 24, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kazuhiro Noguchi
  • Patent number: 10247902
    Abstract: A motor includes a vibrator, a mover guided by a guide member to move with the vibrator, and rollers sandwiched between the mover and the guide member. The mover includes first and second groove shapes formed along a moving direction of the vibrator to separate from each other. The guide member includes first and second guide parts opposite to the first and second groove shapes, respectively. The rollers are sandwiched among the first and second groove shapes, and the first and second guide parts. On a rear side of a surface of the guide member where the first and second guide parts are formed, the mover includes regulating parts regulating a movement of the guide member to the rear side. When the guide member abuts against the regulating parts, part of each of the rolling balls is positioned inside the first and second groove shapes.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: April 2, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Kazuhiro Noguchi
  • Patent number: 9884595
    Abstract: A cable connection on a motor unit of an electric auxiliary drive for a bicycle, the motor unit includes an external rotor having a rotational axis that is perpendicular to the plane of the wheels. The cable connection has a solid connecting piece which can be connected to the motor unit and conductors for connection to the cores of a cable to be fed at an angle.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: February 6, 2018
    Assignee: HIGHTEC EDV-SYSTEME GMBH
    Inventors: Vera Strothmann, Stefan Hittinger
  • Patent number: 9660173
    Abstract: There is provided a vibration generating apparatus including: a housing having an internal space; a vibrating plate fixedly installed in the housing and having a disc shape; a piezoelectric element fixed to the vibrating plate and having a hollow disc shape; and a vibration element vibrating together with the vibrating plate when the piezoelectric element is deformed.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: May 23, 2017
    Assignees: MPLUS CO., LTD., IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
    Inventors: Hwa Young Oh, Seung Hyeon Jeong, Gun Hee Jang, Ja Hyun Nam, Tae Heum Yeon, Young Jin Kim
  • Patent number: 9401667
    Abstract: A vibration-type driving device includes a vibrator including an electro-mechanical transducer and an elastic portion supported by a shaft, and a rotor the position of which relative to the vibrator changes. The rotor includes a first rotor having a threaded portion engaging with a first threaded portion formed on the elastic portion, and a second rotor having a threaded portion engaging with a second threaded portion formed on the shaft. The first rotor and the second rotor are configured to be driven integrally with each other, with a spring member between the first rotor and the second rotor.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: July 26, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Akira Shimada
  • Patent number: 9209714
    Abstract: A vibrating actuator assembly including: a rotor that is rotatable; a first stator disposed at one surface of the rotor and including a first vibrating plate that is elastically deformable and a first vibrating device that is disposed at the first vibrating plate and transforms the first vibrating plate by vibrating when an electrical signal is applied; and a second stator disposed at the other surface of the rotor and comprising a second vibrating plate that is elastically deformable and a second vibrating device that is disposed at the second vibrating plate and deforms the second vibrating plate by vibrating when an electrical signal is applied, in which electrical signals having different phases are respectively applied to the first and second vibrating devices.
    Type: Grant
    Filed: February 11, 2013
    Date of Patent: December 8, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Seung-hwan Lee
  • Patent number: 8970091
    Abstract: A vibration-type driving apparatus includes 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. The moving member includes a body portion and a contacting portion with a friction surface that comes into frictional contact with the vibration member and, in an area extending from a rotation axis in a radial direction, a line connecting a centroid of a shape of the moving member to an arbitrary point of the contacting portion of the moving member is parallel to a direction of the vibration trajectory of the vibration member.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: March 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kei Suefuji
  • 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: 8890390
    Abstract: A vibration-wave driving device includes a vibrator having an electromechanical-energy converting element, and a moving mechanism configured to allow the vibrator to move relative to a movable body, in a plane parallel to a plane where the vibrator and the movable body are in contact, in a second direction intersecting with a first direction being a direction of a driving force produced by the vibrator. The moving mechanism includes a guide member that regulates a moving direction of the vibrator, and the guide member includes a member having a rollable curved portion.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: November 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kaishi Ohashi
  • Patent number: 8729773
    Abstract: A drive unit includes an actuator main body configured to vibrate to output a driving force, a movable body, which is contacted by the actuator main body and is movable relative to the actuator main body in a predetermined moving direction, and an opposing member positioned to face the actuator main body with the movable body interposed therebetween and hold the movable body together with the actuator main body so that the movable body is sandwiched therebetween. A portion of the movable body, which contacts the opposing member, has an elastic modulus lower than that of the opposing member.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: May 20, 2014
    Assignee: Panasonic Corporation
    Inventors: Eiichi Nagaoka, Hideaki Mukae
  • Patent number: 8536762
    Abstract: Provided is an annular vibration wave actuator capable of distributing a contact surface pressure at a contacting portion over the entire contacting face and capable of reducing sliding in the direction orthogonal to the driving direction, thus improving durability.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: September 17, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuki Oda
  • Publication number: 20130230196
    Abstract: The present invention addresses the problem of increasing the lifetimes of an oscillatory wave motor and a sound generation device using the oscillatory wave motor as a drive source, and proposed the structure and mechanism for integrally increasing the lifetimes of the oscillatory wave motor and the sound generation device using the oscillatory wave motor as the drive source. To maintain the drive performance of a drive unit, the drive unit is provided with a core sheathing structure, with the result that the drive unit is prevented from breaking and being damaged, and even if the entire drive unit is worn down, an intrinsic drive unit member serving as a core portion keeps the same drive area, so an initial drive feature is maintained. The descending order of a wear resistance of the members is the drive unit core material, a moving unit, and a drive unit sheathing material.
    Type: Application
    Filed: November 8, 2011
    Publication date: September 5, 2013
    Applicant: NIKKO COMPANY
    Inventors: Hirokazu Negishi, Ikuo Oohira, Juro Ohga, Takaaki Ishii
  • Patent number: 8525388
    Abstract: A vibration wave driving apparatus according to the present invention includes a vibrator having at least a vibration body formed with a projecting portion having spring characteristics and an electro-mechanical energy conversion element, the vibration wave driving apparatus using motion of the projecting portion to drive a driven body in contact with the projecting portion, wherein the vibration body includes a base portion and the projecting portion, the projecting portion includes two wall portions formed in parallel to a direction orthogonal to a drive direction of the driven body extending in an out-of-plane direction with respect to the base portion and two wall portions formed in parallel to the drive direction of the driven body extending in an out-of-plane direction with respect to the base portion and a contact portion including a contact surface with the driven body formed by connecting the wall portions.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: September 3, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuyuki Araki
  • Patent number: 8513856
    Abstract: A power transmitting mechanism assembly including a supporting plate; a first roller, which is rotatably attached to the supporting plate; a first plate, which contacts a first end of the first roller and is arranged to be able to rotate with respect to the supporting plate; a power generating unit, which generates power for rotating the first plate when a signal is applied; a second plate, which is arranged to contact a second end of the first roller; and a friction changing unit, which is attached to at least one of the first roller, the first plate, and the second plate and changes friction of a portion of a contacting surface between the first roller and the first plate or friction of a portion of a contacting surface between the first roller and the second plate.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: August 20, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chan-young Moon, Jong-ho Baek, Dong-eui Shin, Jae-kyu Shim, Woo-jong Cho, Mun-cheol Choi
  • Patent number: 8513857
    Abstract: A vibrational wave motor which can realize a suitable drive performance and can be driven quietly. The vibrational wave motor includes: 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: Grant
    Filed: January 28, 2011
    Date of Patent: August 20, 2013
    Assignee: Nikon Corporation
    Inventors: Takatoshi Ashizawa, Toshikazu Morioke
  • Patent number: 8466603
    Abstract: A driving apparatus is capable of efficiently transmitting a reciprocating displacement of an electromechanical transducer element to a movement member and of effectively utilizing a vacant space. The driving apparatus includes an electromechanical transducer element having first and second end faces opposed to each other in a direction of expansion and contraction thereof, a vibration friction portion attached to the second end face of the electromechanical transducer element, and a movement member friction-bonded to the vibration friction portion. The movement member is movable along the direction of expansion and contraction of the electromechanical transducer element. The driving apparatus includes a vibration transmission member arranged between the second end face of the electromechanical transducer element and an end face of the vibration friction portion. A central axis of the electromechanical transducer element and a central axis of the vibration friction portion are not on the same line.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: June 18, 2013
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Makoto Takahashi, Masato Nito
  • Patent number: 8432627
    Abstract: A vibration actuator having excellent driving performance, a method for manufacturing the vibration actuator, a lens barrel and a camera. The vibration actuator is provided with: an electromechanical conversion element which converts an electric energy into a mechanical energy; an elastic body which generates vibration waves by oscillation of the electromechanical conversion element; a resin layer, which is formed of a conductive thermoplastic resin and bonds the electromechanical conversion element and the elastic body with each other; and a relatively moving member which is brought into contact with the elastic body with a pressure and is relatively moved to the elastic body by vibration waves.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: April 30, 2013
    Assignee: Nikon Corporation
    Inventor: Satoshi Kariya
  • 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: 8274198
    Abstract: 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.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: September 25, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sunghyuk Park, Jin-woo Cho, Ji-hyuk Lim
  • Publication number: 20120228998
    Abstract: 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.
    Type: Application
    Filed: February 29, 2012
    Publication date: September 13, 2012
    Applicants: CANON KABUSHIKI KAISHA, NIHON CERATEC CO., LTD., TAIHEIYO CEMENT CORPORATION
    Inventors: Yutaka Maruyama, Akira Shimada, Yutaka Inada, Masashi Matsumoto, Yuu Itou
  • Patent number: 8228389
    Abstract: An image pickup apparatus of the present invention is an image pickup apparatus including an ultrasonic motor 35 that moves a focus lens 24, and further including a correction control part 100 that operates the ultrasonic motor 35 under a predetermined condition. The correction control part 100 is capable of executing a correction process by measuring a frequency characteristic of an applied voltage at the time of operating the ultrasonic motor 35 at a predetermined rotation speed, comparing the frequency characteristic with a preset reference frequency characteristic, and correcting the frequency characteristics on the basis of a difference between the frequency characteristic and the reference frequency characteristic so as to calculate a correction frequency characteristic. Accordingly, even when the frequency characteristic of the ultrasonic motor varies due to wear of the ultrasonic motor and mechanical components coupled thereto, a stable drive can be maintained over a long time.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: July 24, 2012
    Assignee: Panasonic Corporation
    Inventors: Kenji Kawazoe, Yasuhiro Shingu, Norikazu Katsuyama, Hiroyuki Kawahara
  • Patent number: 8179019
    Abstract: Positioning apparatus comprises: a first surface; a tubular body and a first end surface at a first end of the tubular body and 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, and, while the first travelling surface wave is travelling along 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, 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.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: May 15, 2012
    Assignee: Nanomobile Ltd.
    Inventor: Andrii Volkov
  • 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
  • Patent number: 8049396
    Abstract: 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.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: November 1, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-hyuk Park, Jin-woo Cho, Ji-hyuk Lim
  • 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: 7952258
    Abstract: A vibration-type actuator having a vibrating body adapted to be deformed for driving and mounted with a contact member having a spring function. The contact member is comprised of a protruding portion adapted to be in contact with a driven body and fixing portions fixed to the vibrating body, and is provided with converting portion disposed between the projecting portion and the fixing portions. The converting portions each have an inclined surface obliquely extending relative to a contact surface provided in the protruding portion for contact with the driven body and extending to a side opposite from the contact surface. The converting portions convert a change in relative distance between the fixing portions caused by deformation of the vibrating body into a displacement of the contact surface.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: May 31, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takao Mori
  • 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: 7876022
    Abstract: A piezoelectric generator includes a piezoelectric ring having upper and lower plane surfaces and a first quality factor (Q-factor), a sound-wave conducting gasket acoustically coupled to the upper plane surface, a metal resonator ring positioned acoustically coupled to the conducting gasket, the metal resonator ring having a second Q-factor substantially greater than the first Q-factor, and at least one bent elastic pusher extending from a periphery of the metal resonator ring. In the generator, an external diameter of the conducting gasket is less than half of an external diameter of the metal resonator ring and the piezoelectric ring, the conducting gasket, and the metal resonator ring are concentrically aligned with respect to a rotational axis.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: January 25, 2011
    Assignee: Discovery Technology International, LLLP
    Inventors: Serhiy Petrenko, Vyacheslav Lavrinenko, Vitalii Koval
  • Publication number: 20100084946
    Abstract: 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.
    Type: Application
    Filed: October 7, 2009
    Publication date: April 8, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Sunghyuk PARK, Jin-woo CHO, Ji-hyuk LIM
  • 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: 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
  • Publication number: 20090261690
    Abstract: An ultrasonic wave handling device for freely revolving and/or sliding (protruding and pulling in) a working member is provided. An ultrasonic wave handling device (1) includes a stator (11) with a working member hole H and a pillar shaped working member (12) which is inserted in the working member hole H. The outline of the working member hole H forms a square shape. Ultrasonic wave generating elements (13) for revolving and/or sliding the working member (12) are attached to each side of the square stators.
    Type: Application
    Filed: September 25, 2007
    Publication date: October 22, 2009
    Inventors: Tomoaki Mashimo, Shigeki Toyama
  • Patent number: 7583008
    Abstract: 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.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: September 1, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuyuki Kojima, Satoru Kitajima
  • Publication number: 20090212662
    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: Application
    Filed: February 5, 2009
    Publication date: August 27, 2009
    Applicant: NIKON CORPORATION
    Inventor: Takatoshi Ashizawa
  • Publication number: 20090015100
    Abstract: 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.
    Type: Application
    Filed: September 22, 2008
    Publication date: January 15, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Nobuyuki KOJIMA, Satoru KITAJIMA
  • Publication number: 20080309193
    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: Application
    Filed: October 27, 2006
    Publication date: December 18, 2008
    Inventors: Henning Ellesgaard, Elvind Johansen, Tom Olesen, Henrik Andersen, Morten Hartvig Hansen
  • Patent number: 7414250
    Abstract: A cryogenic variable temperature scanning tunneling microscope of novel design and component configuration, for use in conjunction with a variety of low temperature methodologies.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: August 19, 2008
    Assignee: Northwestern University
    Inventors: Mark C. Hersam, Edward T. Foley
  • 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: 7365473
    Abstract: A method for displacing a movable element (3) by means of at least two actuators (4, 5) facing each other on a stator (2). Electrical wave signals are simultaneously applied to at least two actuators facing each other so that oppositely directed waves are generated in the surface of the stator. The two oppositely directed waves form a compound wave in the surface of the stator by means of which the movable element is displaced over a moving area located between the actuators.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: April 29, 2008
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Marcus Martinus Petrus Adrianus Vermeulen, Felix Godfried Peter Peeters
  • Patent number: 7352109
    Abstract: There is provided a flat type piezoelectric ultrasonic motor for generating a rotation force to a rotor by ultrasonic vibrations. In the piezoelectric ultrasonic motor, a vibrator is formed of elastic material at a given size, a plurality of piezoelectric plates are attached on the vibrator, a rotor is drivingly connected to the vibrator thereby to be rotated, and a power source unit applies driving voltages to the piezoelectric plates. The piezoelectric plates are arranged on quartered surface areas of the vibrator in such a way that longitudinal axes of neighboring piezoelectric plates form a given angle therebetween and opposing piezoelectric plates have opposite polarizations, and the power source unit applies alternating driving voltages to the piezoelectric plates thereby to make the rotor rotated, thereby making it possible to simplify the piezoelectric plates' shape, minimize its size and enhance its driving efficiency.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: April 1, 2008
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jung Ho Ryu, Dae Hyun Jeong, Sung Won Min, Byung Woo Kang, Hyung Min Choi, Burhanettin Koc
  • Publication number: 20080073999
    Abstract: The invention relates to a piezoelectric ultrasound motor with an oscillator in the form of a piezoelectric plate of the length L and the height H as well as with one or two friction elements which are arranged at the oscillator and elastically pressed against the friction surface of the part to be moved. According to the invention, the piezoelectric plate is divided into two identical parts by a section plane extending vertically to the large surfaces, with at least one of these parts including an asymmetrical generator of an asymmetrical acoustic standing wave, which upon its activation generates an asymmetrical two-dimensional standing wave, so that the friction elements which are arranged in the centre of the long end face of the plate carry out a movement with an inclination relative to the end face, so that the energy of motion is transferred to the element to be moved.
    Type: Application
    Filed: May 13, 2005
    Publication date: March 27, 2008
    Applicant: PHYSIK INSTRUMENTE (PI) GMBH & CO. KG
    Inventors: Wladimir Wischnewskij, Alexej Wischnewsklj
  • Patent number: 7274131
    Abstract: A piezoelectric motor has an actuator which drives a slider. The actuator has a rectangular steel core of square cross-section with an axially projection driving tip. A ceramic piezoelectric element is bonded to each of the four faces of the core. Each piezoelectric element has four quadrants covered by quadrant electrodes on one side and a common or earth electrode on the other side contacting the core which electrically joins the common electrodes. By selective excitation of corresponding diagonally opposite quadrants of opposite piezoelectric elements, the actuator is made to drive the tip in either the X direction or the Y direction. The preferred slider is a spherical ball held captive within arms extending from a housing of the actuator. The driving tip is pressed against the ball by a preload spring acting on the actuator.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: September 25, 2007
    Assignee: Johnson Electric S.A.
    Inventors: Guo Wei Li, Feng Dong Chen, Kai Cheng
  • Patent number: 7245058
    Abstract: A vibration wave driving apparatus includes a vibration member in which an electro-mechanical energy conversion element is fixed to an elastic member, and a contact member pressed against a sliding part provided in the vibration member, so as to be kept in contact therewith. The vibration wave driving apparatus is configured to supply alternating signals in a predetermined driving frequency band to the electro-mechanical energy conversion element, thereby generating a predetermined natural vibration mode in the elastic member to drive the contact member. In the apparatus, the natural vibration mode is generated in the elastic member, a natural frequency of another vibration mode different from the natural vibration mode is detected, and a stiffness of the support member is altered if the natural frequency of the other vibration mode detected is included in the driving frequency band.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: July 17, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kosuke Fujimoto, Shinji Yamamoto, Mitsuo Nishimura, Takao Mori
  • Patent number: 7196454
    Abstract: An apparatus including a base configured to slidably engage a driven element, a piezoelectric element interposing the base and the driven element and attached to the base proximate a first piezoelectric element end, and a friction element attached proximate a second piezoelectric element end and configured to selectively engage the driven element.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: March 27, 2007
    Assignee: Zyvex Corporation
    Inventors: Christof Baur, Kenneth L. Bray
  • Patent number: 7187103
    Abstract: A piezoelectric drive that is used to create a relative movement between a first and a second body on a plane of movement. The drive includes a flat metal sheet (1) that forms, or is secured to, the first body and that is arranged parallel to the plane of movement. The metal sheet (1) has a rest region (3) and at least one resonator area (4). An elastic spring area (5), which is parallel to the plane of the metal sheet, is disposed between the rest region (3) and the resonator area (4). A flat, rectangular piezoelement (6), which can be excited in a 3,1 mode, is coupled to a longitudinal axis (A) such that the longitudinal axis of the piezoelement (6) lies essentially on a longitudinal axis of the resonator area (4). The resonator area (4) protrudes above the piezoelement (6) in the direction of the longitudinal axes (A), and forms a tapered horn shape (7).
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: March 6, 2007
    Assignee: Miniswys SA
    Inventor: Bonny Witteveen