Circular Disc, Ring, Or Cylinder Patents (Class 310/369)
  • Patent number: 10454020
    Abstract: A crystal vibrator that includes a crystal substrate having a front surface and a rear surface, including a vibration portion in a region including a center of the crystal substrate, and a first peripheral portion that surrounds a periphery of the vibration portion and that has a smaller thickness than the vibration portion. Drive electrodes are formed on both surfaces of the vibration portion of the crystal substrate. In at least one of the front surface and the rear surface of the crystal substrate, a step is provided between the vibration portion and the first peripheral portion, and a first peripheral edge portion of the vibration portion and a second peripheral edge portion of the first peripheral portion are in a curved surface shape.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: October 22, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Masao Gamo, Kazuyuki Noto, Keiichi Kami
  • Patent number: 10016121
    Abstract: An ultrasound transducer element includes a plurality of electrostatic capacitance type ultrasound cells each having a lower electrode portion and a membrane including an upper electrode portion that are oriented and disposed via a cavity circular in plan view, and a thickness of the cavity monotonously decreases in a curved manner toward an outer circumferential portion from a center portion of the cavity.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: July 10, 2018
    Assignee: OLYMPUS CORPORATION
    Inventors: Kazuya Matsumoto, Kazuhisa Karaki, Mamoru Hasegawa, Katsuhiro Wakabayashi
  • Patent number: 9071170
    Abstract: A movable side mounting portion transmits extension and contraction of a polymer actuator to an electric prosthetic hand. The polymer actuator deforms elastically in accordance with voltage application and returns to its original shape in accordance with stoppage of voltage application. A rear end of the polymer actuator is fixed and a front end of the polymer actuator is movable. When one of a pair of electrodes of the polymer actuator is electrically connected to the fixed side mounting portion, the fixed end is fastened by a bolt to the fixed side mounting portion. Also, when the other electrode is electrically connected to the movable side mounting portion, the movable end is fastened by a bolt to the movable side mounting portion.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: June 30, 2015
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Kazumasa Baba, Hiromitsu Takeuchi
  • Patent number: 8981624
    Abstract: A micromachined structure, comprises a substrate and a cavity in the substrate. The micromachined structure comprises a membrane layer disposed over the substrate and spanning the cavity.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: March 17, 2015
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: David Martin, Donald Lee, John Choy, Joel Philliber, Osvaldo Buccafusca
  • Patent number: 8973227
    Abstract: A tubular clip for securing a sleeve to the body of a piezoelectric actuator in an actuator assembly. In use, the wall of the clip has a plurality of corrugations. The pitch of the corrugations is variable in the direction of the longitudinal axis of the clip. The clip is configurable into an unfitted configuration and into a fitted configuration and in the fitted configuration the minimum transverse internal separation of the clip walls is less than in the unfitted configuration.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: March 10, 2015
    Assignee: Delphi International Operations Luxembourg, S.A.R.L.
    Inventors: Karl W Graham, Guy C. Sandford
  • Patent number: 8941286
    Abstract: An acoustic wave device includes: a piezoelectric thin film resonator including: a substrate; a lower electrode formed on the substrate; at least two piezoelectric films formed on the lower electrode; an insulating film sandwiched by the at least two piezoelectric films; and an upper electrode formed on the at least two piezoelectric films, wherein an area of the insulating film within a resonance region, in which the lower electrode and the upper electrode face each other across the at least two piezoelectric films, is different from an area of the resonance region.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: January 27, 2015
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Shinji Taniguchi, Tokihiro Nishihara
  • Patent number: 8941288
    Abstract: When a rotating shaft member (140) rotates, a centrifugal force operates to a pressing member (152jk) (j=1 to J; k=1 to 6) which is fixed to the rotating shaft member (140). When the centrifugal force operates to the pressing member (152jk), the end portion of the second bar-like member (157), which is connected to a first bar-like member (156) on the other end portion, moves closer to a pressure transmitting member (130), and a contact member (158) connected to said end portion of the second bar-like member (157) presses the pressure transmitting member (130). When the pressure transmitting member (130) is pressed in this manner, the pressing force is applied to a piezoelectric element of an individual power generating section (122jp) which abuts on the R direction side of the pressing position of the pressure transmitting member (130). When the pressing force is applied to the piezoelectric element in this manner, the piezoelectric element continuously generates voltages.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: January 27, 2015
    Assignee: Pioneer Corporation
    Inventor: Hiroki Okabayashi
  • Patent number: 8928205
    Abstract: An actuator, which can include piezoelectric material, is provided in the form of a single-layer or multi-layer flat plate. At least one layer has two electrodes spaced from each other by means of a separating area and arranged opposite each other both on the upper face of the at least one layer and on the lower face of the at least one layer. The electrodes of the upper face are arranged at an offset from the electrodes of the lower face. A motor is also provided to include the actuator and a movable element to be driven by means of the actuator.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: January 6, 2015
    Assignee: Physik Instrumente (PI) GmbH & Co. KG
    Inventor: Burhanettin Koc
  • Publication number: 20140257109
    Abstract: A method for producing a composite piezoelectric body includes: forming a composite piezoelectric body by filling a non-conductive polymer between a plurality of piezoelectric materials arranged in an array state at predetermined intervals, and polishing one surface of the composite piezoelectric body, from which surface at least the piezoelectric materials and the polymer are exposed, by using an abrasive film in which an abrasive particle is applied to a base film.
    Type: Application
    Filed: February 28, 2014
    Publication date: September 11, 2014
    Applicant: KONICA MINOLTA, INC.
    Inventor: Yuichi NISHIKUBO
  • Patent number: 8810113
    Abstract: Disclosed is an electromechanical transducer and the method for manufacturing the same, which can detect or control deformation and vibration of a structure and flow of fluids by applying controlling forces. The electromechanical transducer of the present invention comprises a base substrate to which initial stress is applied; an electro-active material layer attached on the base substrate; and electrodes installed on the top and bottom side of the electro-active material layer for actuating the electro-active material layer, the base substrate and the electro-active material layer which is deformed when initial stress is removed from the base substrate so that the base substrate and the electro-active material layer have curvatures.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: August 19, 2014
    Assignee: Agency for Defense Development
    Inventors: Jae Hung Han, Lae Hyong Kang, Jong Won Lee, Sang Joon Chung
  • Publication number: 20140217853
    Abstract: The present disclosure provides an ionic ring comprising a number of piezoelectric elements, a piezoelectric device including the ionic ring, and a piezoelectric generator including the ionic ring and host devices incorporating the piezoelectric generator. The piezoelectric generator can be used to generate energy on a portable electronic device in response to mechanical deformation. The generated energy can be used instead of a battery of the portable electronic device or can be used to charge the battery.
    Type: Application
    Filed: February 4, 2013
    Publication date: August 7, 2014
    Applicant: RESEARCH IN MOTION LIMITED
    Inventor: Peter Mankowski
  • Patent number: 8793849
    Abstract: A method of fabricating a thickness shear mode (TSM) gas and organic vapor sensor having a visco-elastic polymer coating and a fundamental frequency greater than 20 MHz. The method begins by providing a piezoelectric crystal and milling a central region of the crystal. Milling the crystal creates a central oscillating region of reduced thickness surrounded by a thicker outer region. Two electrodes are then deposited in the oscillating region of the crystal—one on each side of the crystal. The oscillating region on both sides of the crystal and the electrodes are then coated with a polymer coating.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: August 5, 2014
    Assignee: University of South Florida
    Inventors: Venkat R. Bhethanabotla, Randolph D. Williams
  • Patent number: 8789421
    Abstract: A device for detecting a selvage of a material web or the selvage position in one measuring direction. The device comprises at least one ultrasonic sensor, with the ultrasonic sensor comprising a transmitter element and a receiver element. The external contour of at least one of the transmitter elements and/or of the receiver elements comprises at least one arc segment side and at least one flattened side.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: July 29, 2014
    Assignee: TexMag GmbH Vertriebsgesellschaft
    Inventors: Wolfgang Krauth, Lars Zwerger
  • Patent number: 8786164
    Abstract: An acoustic transducer includes a ring oscillator. The ring oscillator includes: a first cushioning material; a pair of first and second annular members that are laminated in an axial direction thereof with the first cushioning material therebetween, each of the annular members having first and second ends in a circumferential direction thereof, and a notch portion formed between the first and second end; a first connecting portion that connects the first end of the first annular member and the second end of the second annular member; and a second connecting portion that connects the second end of the first annular member and the first end of the second annular member.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: July 22, 2014
    Assignee: NEC Corporation
    Inventor: Yoshinori Hama
  • Patent number: 8775114
    Abstract: A method and apparatus for determining phase sensitivity of an accelerometer based on an analysis of the harmonic components of the interference signal, which can estimate phase lags of an accelerometer through an analysis of the interference signal obtained using a single photo-detector when the accelerometer moves in sinusoidal motion with an initial phase of vibration. The method comprises the steps of obtaining an interference signal in a time domain generated from a signal reflected by an accelerometer and a fixed mirror using a single photo-detector; transforming the interference signal in the time domain into a signal in a frequency domain including a plurality of harmonic signals by Fourier transform; and determining the phase sensitivity of the accelerometer using initial phase of vibration displacement of the accelerometer, which is included in the interference signal in the frequency domain.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: July 8, 2014
    Assignees: Korea Research Institute of Standards and Science, Korea Advanced Institute of Science and Technology
    Inventors: Yong Bong Lee, Sung Soo Jung, Seung-Woo Kim
  • Patent number: 8742647
    Abstract: A control mechanism for an electrical appliance comprises a deformable or elastic control panel, for example, embodied as a frame of an electric cooking hob. Several piezo sensor elements are arranged under the control panel. The piezo sensor elements are arranged on the rear side of a printed circuit board, the opposite front side of said printed circuit board being arranged or fastened to the underside of the control panel in a planar manner. By determining the difference of the signals of the sensor elements arranged next to each other, it is possible to accomplish an extremely good and safe evaluation of a location where a finger is placed with light pressure on the control panel.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: June 3, 2014
    Assignee: E.G.O. Elektro-Geraetebau GmbH
    Inventor: Henry Fluhrer
  • Patent number: 8720024
    Abstract: A method for processing a ring type piezoelectric device comprises: providing a ring type piezoelectric embryo; printing at least a pair of electrodes to divide the ring type piezoelectric embryo into a plurality of equal sections; and immersing the divided ring type piezoelectric embryo into high temperature silicon oil with high voltage for polarization so as to make the polarization of the ring type piezoelectric device perpendicular to a cross-section thereof.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: May 13, 2014
    Assignee: Chung-Yuan Christian University
    Inventors: Yung Ting, Sheuan-Perng Lin
  • Patent number: 8710719
    Abstract: A piezoelectric device includes a piezoresonator body (3) having opposing first and second surfaces and opposing third and fourth surfaces. The device also includes at least one common electrode (8) disposed on the second surface (15) and electrodes (4a, 4b) disposed on the first surface (14) in pairs along a first longitudinal axis. The device further includes contact elements (5) disposed on the third (16) and the fourth (17) surfaces at contact locations along the first longitudinal axis and aligned between each pair of excitation electrodes. In the device, the piezoelectric body has a first order natural resonance frequency (v1) along a second longitudinal axis and an even order natural resonance frequency (v2) along the first longitudinal axis, where a percent difference between v1 and v2 is greater than 0% and less than or equal to 20%.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: April 29, 2014
    Assignee: Discovery Technology International, Inc.
    Inventors: Serhiy Petrenko, Valentin Rangelov Zhelyaskov
  • Patent number: 8698379
    Abstract: A piezoelectric vibrating device comprises a metallic containing member, a piezoelectric member and a heat dissipating and conducting member. The piezoelectric member is provided within the metallic containing member, and the heat dissipating and conducting member includes a plurality of the heat dissipating and conducting fins. Each the heat dissipating and conducting fin has a first heat conduction connecting end and a second heat conduction connecting end, wherein the first heat conduction connecting end is provided on an external surface of the piezoelectric member, and the second heat conduction connecting end is connected with an inner wall surface of the metallic containing member.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: April 15, 2014
    Assignee: Datron Products Co., Ltd.
    Inventor: Wen-Tong Leu
  • Patent number: 8686622
    Abstract: The composite substrate is a substrate used to manufacture an acoustic wave device, and includes a support substrate, a piezoelectric substrate, and a adhesive layer with which the support substrate and the piezoelectric substrate are bonded to each other. In the composite substrate, assuming that a surface of the piezoelectric substrate that is bonded to the support substrate is defined as a first surface and a surface at the side opposite to the first surface is defined as a second surface, the piezoelectric substrate is formed such that the first surface is inside the second surface when the first surface is projected onto the second surface in a direction perpendicular to the second surface. In other words, the composite substrate has an outer peripheral surface that is formed such that the circumference thereof increases toward the top surface of the piezoelectric substrate.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: April 1, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Hiroki Kobayashi, Yuji Hori, Yasunori Iwasaki
  • Patent number: 8680752
    Abstract: The present invention comprises systems, apparatuses, and methods for harvesting ambient mechanical energy at a lower frequency and transforming the harvested energy into electrical energy at a higher frequency. Transforming the energy from relatively lower input frequency energy to relatively higher output frequency energy can help realize greater efficiencies found at higher frequencies. Because the input plane of the ambient mechanical energy is not always predictable, some embodiments of the present invention comprise both in-plane and out-of-plane energy harvesters that produce an electrical output in multiple planes.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: March 25, 2014
    Assignee: Georgia Tech Research Corporation
    Inventors: Farrokh Ayazi, Logan Sorenson, Jenna Fu
  • Patent number: 8669687
    Abstract: The present disclosure relates to a method of adjusting the resonance frequency of a vibrating element, comprising measuring the resonance frequency of the vibrating element, determining, using abacuses and as a function of the resonance frequency measured, a dimension and a position of at least one area of modified thickness to be formed on the vibrating element so that the resonance frequency thereof corresponds to a setpoint frequency, and forming on the vibrating element, an area of modified thickness of the determined dimension and position.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: March 11, 2014
    Assignee: STMicroelectronics SA
    Inventors: Jean-Francois Carpentier, Fabrice Casset, Yoan Civet, Skandar Basrour
  • Patent number: 8664830
    Abstract: An ultrasonic device is configured to transmit ultrasonic waves and includes a substrate, a diaphragm, a piezoelectric member and a control unit. The substrate has an opening. The diaphragm covers the opening of the substrate. The piezoelectric member is coupled to the diaphragm, and includes a first piezoelectric part and a second piezoelectric part. The control unit controls a voltage applied to the first piezoelectric part to be a vibration voltage and controls a voltage applied to the second piezoelectric part to be a constant voltage when the ultrasonic device transmits the ultrasonic waves.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: March 4, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Tsukasa Funasaka, Tomoaki Nakamura
  • Patent number: 8650728
    Abstract: In one general aspect, various embodiments are directed to an ultrasonic surgical instrument that comprises a transducer configured to produce a standing wave of vibrations along a longitudinal axis having a node and an anti-node at a predetermined frequency. In various embodiments, an ultrasonic blade extends along the longitudinal axis and is coupled to the transducer. In various embodiments, the ultrasonic blade includes a body having a proximal end and a distal end, wherein the distal end is movable relative to the longitudinal axis by the vibrations produced by the transducer. In one general aspect, various embodiments are directed to a method of assembling the transducer for the ultrasonic surgical instrument. In various embodiments, the method comprises selecting piezoelectric elements and arranging the piezoelectric elements relative to the node to minimize the difference in magnitude between the currents drawn by the piezoelectric elements.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: February 18, 2014
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Shan Wan, Scott A. Nield, Shawn D. Bialczak, Ashvani K. Madan
  • Publication number: 20130249354
    Abstract: There is provided a piezoelectric film-attached substrate, including a piezoelectric film having a specific thickness, wherein a reflection spectrum shows a relation between a light obtained in such a way that the surface of the piezoelectric film is irradiated with an irradiation light having a specific wavelength and the irradiation light is reflected on the surface of the piezoelectric film, and a light obtained in such a way that the irradiation light is transmitted through the piezoelectric film and is reflected on the surface of the lower electrode, which is the reflection spectrum at least at one point on a center part and an outer peripheral part of the piezoelectric film, and such a reflection spectrum has at least one of the maximum value and the minimum value respectively, wherein the reflectance at least in one maximum value is 0.4 or more.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 26, 2013
    Applicant: HITACHI CABLE, LTD.
    Inventors: Kazutoshi WATANABE, Kenji SHIBATA, Kazufumi SUENAGA, Akira NOMOTO, Fumimasa HORIKIRI
  • Patent number: 8497747
    Abstract: A microelectromechanical (MEM) filter is disclosed which has a plurality of lattice networks formed on a substrate and electrically connected together in parallel. Each lattice network has a series resonant frequency and a shunt resonant frequency provided by one or more contour-mode resonators in the lattice network. Different types of contour-mode resonators including single input, single output resonators, differential resonators, balun resonators, and ring resonators can be used in MEM filter. The MEM filter can have a center frequency in the range of 10 MHz-10 GHz, with a filter bandwidth of up to about 1% when all of the lattice networks have the same series resonant frequency and the same shunt resonant frequency. The filter bandwidth can be increased up to about 5% by using unique series and shunt resonant frequencies for the lattice networks.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: July 30, 2013
    Assignee: Sandia Corporation
    Inventors: Kenneth E. Wojciechowski, Roy H. Olsson, III, Maryam Ziaei-Moayyed
  • Patent number: 8476804
    Abstract: A piezoelectric drive type MEMS element includes: a first substrate including, in a portion thereof, a movable part which is driven by a piezoelectric drive section to be displaced in a convex shape, a movable electrode being provided on a surface of the movable part; and a second substrate which is bonded to the first substrate and supports a fixed electrode facing the movable electrode via a prescribed gap, wherein the piezoelectric drive section includes a piezoelectric film provided on a region of the first substrate which forms the movable part as a portion of the movable part, and a pair of electrodes disposed so as to sandwich the piezoelectric film.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: July 2, 2013
    Assignee: FUJIFILM Corporation
    Inventor: Yoshikazu Hishinuma
  • Patent number: 8458889
    Abstract: An actuator manufacturing method includes alternately stacking a plurality of dielectric elastomer layers and a plurality of conductive rubber layers along the direction of thickness to form a sheet, and wrapping the sheet formed about a core to form a rolled sheet. When the sheet formed in the step of alternately stacking is wrapped about the core, the sheet is formed by the dielectric elastomer layers and the conductive rubber layers. Therefore, even if the dielectric elastomer layers in the sheet are made to be thin, the thickness of the entire sheet is prevented from being excessively thin.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: June 11, 2013
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Yutaka Tsuchikawa, Takashi Maeno, Naoto Kuriyama, Takanori Nakai, Hiromitsu Takeuchi, Yoji Kimura
  • Patent number: 8450906
    Abstract: A piezoelectric thin-film resonator includes a substrate, a lower electrode provided on the substrate, a piezoelectric film provided on the substrate and the lower electrode, an upper electrode provided on the piezoelectric film, and an additional pattern, a cavity being formed between the lower electrode and the substrate in a resonance portion in which the lower electrode and the upper electrode face each other through the piezoelectric film, the additional pattern being provided in a position that is on the lower electrode and includes an interface between the resonance portion and a non-resonance portion.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: May 28, 2013
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Shinji Taniguchi, Tokihiro Nishihara, Masafumi Iwaki, Masanori Ueda, Tsuyoshi Yokoyama, Takeshi Sakashita, Motoaki Hara
  • Patent number: 8446065
    Abstract: A tubular actuator including a flexible tube or roll, operable to shift between first and second configurations so as to define a stroke, and utilizing active material activation to produce, modify, and/or retain the stroke.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: May 21, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Alan L. Browne, Jan H. Aase, Paul W. Alexander, Nancy L. Johnson, Xiujie Gao
  • Patent number: 8397373
    Abstract: A method for manufacturing a multilayer polymeric actuator includes the following steps: arranging a rotating winding core; winding a dielectric film of polymeric material around the winding core; during winding, applying a conductive material on the dielectric film exposed face, in which the application occurs intermittently according to a pre-established sequence, and according to a first and a second geometrical application pattern mutually alternated at each winding turn, so as to form a roll; radially cutting the roll at the ends of a circumferentially localized zone; and connecting a conductive material layers having the first geometrical application pattern one to the other and the conductive material layers having the second geometrical application pattern one to the other.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: March 19, 2013
    Assignees: Fondazione Istituto Italiano di Tecnologia, Universita Degli Studi di Genova
    Inventors: Marco Randazzo, Renato Buzio, Giulio Sandini, Ugo Valbusa
  • Patent number: 8390181
    Abstract: An electronic array probe for ultrasonic imaging includes an array of transmitting and/or receiving electroacoustic transducers arranged in concentric bands in which the transducers are tangent to one other in both radial and circumferential directions. In order to minimize the number of transducers required without compromising dynamic range, a transducer arrangement geometry is provided so that the number of transducers having the same focusing delay is minimal or null.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: March 5, 2013
    Assignee: Esaote S.p.A.
    Inventor: Marino Cerofolini
  • Patent number: 8344595
    Abstract: An ultrasonic transducer is configured to transmit and receive ultrasonic waves. The ultrasonic transducer includes a vibrating member and a piezoelectric member coupled to the vibrating member. The piezoelectric member includes a first piezoelectric part configured and arranged to be deformed by applied voltage to vibrate the vibrating member or configured and arranged to be deformed by vibration of the vibrating member to produce a potential difference, and a second piezoelectric part configured and arranged to be deformed by applied voltage to statically deflect the vibrating member.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: January 1, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Tsukasa Funasaka, Tomoaki Nakamura
  • Patent number: 8308454
    Abstract: A fluid conveyance device includes a substrate, and a disk-shaped piezoelectric element arranged in a bendable manner on the substrate. A plurality of substantially circular concentric segment electrodes are provided on the piezoelectric element, and are provided with voltages with phases that are shifted. A wavy ring deformation is thus produced on the piezoelectric element. A pocket produced between the piezoelectric element and the substrate is moved in a radial direction so as to convey a fluid from an outer substantially circular portion to a central portion and to discharge the fluid from the central portion.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: November 13, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Gaku Kamitani, Atsuhiko Hirata
  • Patent number: 8304967
    Abstract: A flexural vibration piece includes: a base portion; a vibrating arm extending from the base portion and having a first surface, a second surface opposing the first surface, and side surfaces connecting the first surface and second surface, wherein a laminated structure including a first electrode, a second electrode, and a piezoelectric layer disposed between the first electrode and second electrode, is formed on each of the first surface and second surface, the piezoelectric layer formed on the first surface side and the piezoelectric layer formed on the second surface side have mutually opposite polarization directions, and the first electrode formed on the first surface side and the first electrode formed on the second surface side are connected to each other.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: November 6, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Teruo Takizawa
  • Publication number: 20120262031
    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: Application
    Filed: March 19, 2012
    Publication date: October 18, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yuki Oda
  • Patent number: 8287253
    Abstract: A fluid conveyance device includes a substrate, and a disk-shaped piezoelectric element arranged in a bendable manner on the substrate. A plurality of substantially circular concentric segment electrodes are provided on the piezoelectric element, and are provided with voltages with phases that are shifted. A wavy ring deformation is thus produced on the piezoelectric element. A pocket produced between the piezoelectric element and the substrate is moved in a radial direction so as to convey a fluid from an outer substantially circular portion to a central portion and to discharge the fluid from the central portion.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: October 16, 2012
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Gaku Kamitani, Atsuhiko Hirata
  • Patent number: 8286330
    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: Grant
    Filed: May 3, 2010
    Date of Patent: October 16, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jun Tamai
  • Patent number: 8283838
    Abstract: A piezoelectric linear motor for providing enhanced displacement using a dome-shaped piezoelectric ceramic is provided. The piezoelectric linear motor includes a dome-shaped piezoelectric ceramic (100) processed such that different electrodes are formed on opposite surfaces of the piezoelectric ceramic. A vibration shaft (200) is fixed to a first surface of the piezoelectric ceramic so that the vibration shaft moves in conjunction with displacement of the piezoelectric ceramic. A movable element (300) is linearly driven through friction with the vibration shaft while coming into contact with the vibration shaft. The movable element moves in a movement direction of the vibration shaft if the inertial force of the movable element is less than the frictional force between the movable element and the vibration shaft when the vibration shaft moves. According to the present invention, the piezoelectric ceramic is formed in a dome shape, so that movement displacement is enhanced.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: October 9, 2012
    Assignees: Inova Inc., Santoma, Ltd.
    Inventor: Man Sun Yun
  • Patent number: 8250732
    Abstract: A tubular elastomer actuator with a shape in a cross-sectional view which shape exposes at most one single axis of symmetry of a specific length, e.g., an oval shape. The actuator could be made from a sheet made from a plurality of plate shaped elements which are laminated together and rolled. Each plate shaped element may have a corrugation that gives the element an anisotropic structure, and contains an electrode on only one surface. The actuator displacement is the result of shrinkage displacement of the plate shaped elements upon the application of electrical field across their thickness.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: August 28, 2012
    Assignee: Danfoss A/S
    Inventors: Mohamed Yahia Benslimane, Peter Gravesen
  • Patent number: 8253304
    Abstract: The invention relates to an ultrasonic linear drive unit comprising a driving element as an ultrasonic oscillator with two generators for ultrasonic vibrations and a driven element that forms a frictional contact with the driving element, and an electrical excitation source for the driving element. According to the invention, the ultrasonic oscillator is designed as a hollow thin-walled piezoelectric cylinder, the height H of which is identical to or smaller than the mean diameter D thereof. The generators for ultrasonic vibrations are symmetrically disposed on both sides relative to the sectional plane S that extends through the center of the height of the ultrasonic oscillator, perpendicular to the longitudinal axis L thereof. The cylinder surface of the driving element is in contact with the driven element, and the electrical excitation source is connected to the ultrasonic linear drive unit in such a way that the drive unit excites only the first or the second generator for ultrasonic vibrations.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: August 28, 2012
    Assignee: Physik Instrumente (PI) GmbH & Co. KG
    Inventors: Wladimir Wischnewskij, Alexej Wischnewskij
  • 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: 8183745
    Abstract: An example ultrasound device, such as a transducer array, includes a plurality of ultrasound transducers, each ultrasound transducer having a first electrode, a second electrode, a thin piezoelectric film located between the electrodes, and a substrate supporting the plurality of ultrasound transducers. In some examples, the electrode separation is less than 10 microns, facilitating lower voltage operation than conventional ultrasound transducers.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: May 22, 2012
    Assignee: The Penn State Research Foundation
    Inventors: Susan Trolier-McKinstry, Thomas N. Jackson, Kyusun Choi, Richard L. Tutwiler, In Soo Kim, Hyun Soo Kim, Sung Kyu Park, Ioanna G. Mina
  • Patent number: 8179027
    Abstract: A method includes applying a lip, comprised of a first material, along at least a portion of an actuator of an electronic device, and applying a coating, comprised of an elastic material, to cover a part of the actuator, the coating disposed to facilitate actuation of the actuator.
    Type: Grant
    Filed: October 13, 2009
    Date of Patent: May 15, 2012
    Assignee: Research In Motion Limited
    Inventors: Patrick Clement Strittmatter, Richard James Brogle, Ian Paul Barta, Todd Robert Paleczny, Arnett Ryan Weber, Kurt Johannes Gerd Mehlhorn
  • Patent number: 8174166
    Abstract: The invention as disclosed is a strain sensor that locates and quantifies the strain energy from a structure. The strain sensor has a lead zirconate titanate wafer with a circular shape such that the shape does not directionally restrict the signal of the sensor.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: May 8, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Derke R. Hughes, Dennis F. Desharnais, Jeffrey T. Feaster
  • Patent number: 8169122
    Abstract: Method and apparatus for sonication in connection with preparing a cellular sample containing DNA or RNA for performance of polymerase chain reaction (PCR) or for other reasons where it is important to break down the cell walls and other cellular structures to release cellular contents including DNA. The same methods and apparatus may be used to release DNA or RNA from virus for PCR or other uses. A novel apparatus which is capable of releasing cellular contents or releasing the DNA or RNA of virus without the aid of beads or chemicals is described herein. The apparatus is designed to deliver high levels of sonic energy through optimizing the geometry the apparatus and optimizing the force created by a piezoelectric transducer. The apparatus is capable of processing samples which are contained within fluid in a short amount of time between 30 seconds and two and one half minutes. The apparatus is small and can be field deployable or used in a standard molecular biology laboratory.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: May 1, 2012
    Assignee: DXNA LLC
    Inventors: Danvern R. Roberts, William D. Bickmore, Jared Hummel, Daniel Esplin, Paul Day
  • Patent number: 8134280
    Abstract: An electronic radial ultrasonic probe comprising an electronic radial array which comprises a plurality of ultrasonic transducers being continuously arrayed circularly around an insertion axis as center and also for which a transmission/reception of an ultrasonic wave is controlled by electronically selecting the plurality of ultrasonic transducer, comprises: a support member equipped on the electronic radial array; a lock member featured with a cavity in which the support member is inserted and with a lock groove for locking a balloon which is mounted in a manner to cover the electronic radial array and in which an ultrasonic medium is filled; and a filler member which is constituted by an adhesive material converting from a fluid state to a solid state, and is filled in the cavity.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: March 13, 2012
    Assignees: Olympus Medical Systems Corp., Olympus Corporation
    Inventors: Yukihiko Sawada, Akiko Mizunuma, Katsuhiro Wakabayashi, Takuya Imahashi, Sunao Sato
  • Patent number: 8115367
    Abstract: By resistor attached by a piezoelectric element, measurement with high accuracy is possible by strain of the piezoelectric element. A piezoelectric actuator includes the piezoelectric element which is formed into an arbitrary shape, polarized in an arbitrary direction, and includes electrodes provided on at least two surfaces opposed in a thickness direction thereof. The piezoelectric actuator also includes a driver power supply for applying a voltage between the electrodes to generate strain in the piezoelectric element, a driver power supply for applying a voltage to generate strain in the piezoelectric element, resistors provided on the electrodes through intermediation of insulators, and a displacement detection device connected with the resistors. The electrodes of the piezoelectric element on which the resistors are provided are set at a ground potential.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: February 14, 2012
    Assignee: SII NanoTechnology Inc.
    Inventor: Masato Iyoki
  • Patent number: 8110963
    Abstract: An ultrasonic transducer is configured to transmit or receive ultrasonic waves. The ultrasonic transducer includes a vibrating member and a piezoelectric member coupled to the vibrating member. The piezoelectric member includes a first piezoelectric part configured and arranged to be deformed by applied voltage to vibrate the vibrating member or configured and arranged to be deformed by vibration of the vibrating member to produce a potential difference, and a second piezoelectric part configured and arranged to be deformed by applied voltage to statically deflect the vibrating member.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: February 7, 2012
    Assignee: Seiko Epson Corporation
    Inventors: Tsukasa Funasaka, Tomoaki Nakamura
  • Patent number: 8076824
    Abstract: An electronic radial ultrasonic probe comprising an electronic radial array which comprises a plurality of ultrasonic transducers being continuously arrayed circularly around an insertion axis as center and also for which a transmission/reception of an ultrasonic wave is controlled by electronically selecting the plurality of ultrasonic transducer, comprises: a support member equipped on the electronic radial array; a lock member featured with a cavity in which the support member is inserted and with a lock groove for locking a balloon which is mounted in a manner to cover the electronic radial array and in which an ultrasonic medium is filled; and a filler member which is constituted by an adhesive material converting from a fluid state to a solid state, and is filled in the cavity.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: December 13, 2011
    Assignee: Olympus Medical Systems Corp.
    Inventors: Yukihiko Sawada, Akiko Mizunuma, Katsuhiro Wakabayashi, Takuya Imahashi, Sunao Sato