Combined With Damping Structure Patents (Class 310/326)
  • Patent number: 10355659
    Abstract: A method and structure for a transfer process for an acoustic resonator device. In an example, a bulk acoustic wave resonator (BAWR) with an air reflection cavity is formed. A piezoelectric thin film is grown on a crystalline substrate. A first patterned electrode is deposited on the surface of the piezoelectric film. An etched sacrificial layer is deposited over the first electrode and a planarized support layer is deposited over the sacrificial layer, which is then bonded to a substrate wafer. The crystalline substrate is removed and a second patterned electrode is deposited over a second surface of the film. The sacrificial layer is etched to release the air reflection cavity. Also, a cavity can instead be etched into the support layer prior to bonding with the substrate wafer. Alternatively, a reflector structure can be deposited on the first electrode, replacing the cavity.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: July 16, 2019
    Assignee: Akoustis, Inc.
    Inventors: Dae Ho Kim, Mary Winters, Ramakrishna Vetury, Jeffrey B. Shealy
  • Patent number: 10352726
    Abstract: Printed resistive-based sensors and transducers comprising a thin, electronically “active” sensing layer within a dielectric and/or metallic layered structure are provided. The electronic resistance of the active sensing layer is measured during a change in the sensor environment. By utilizing a multi-layered architecture around the active sensing layer, the electronic signal of the sensing element can be improved. By carefully selecting the architecture and materials that surround the active sensing layer, the sensitivity, stability, and selectivity of the sensor to detect changes in the environment are improved. This design allows for a number of specific application areas for environmental sensing.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: July 16, 2019
    Assignee: Brewer Science, Inc.
    Inventors: Ryan E. Giedd, Vijaya Kayastha, Jonathan Fury, Robert Christian Cox
  • Patent number: 10250165
    Abstract: Disclosed is a high speed actuator. The high speed actuator includes an actuation part configured to cause deformation such as bending or twisting and an active stiffness controller on a surface of the actuation part or in the actuation part configured to control in real time a stiffness (e.g., of the actuator) according to an external signal. The active stiffness controller may control a stiffness of the high speed actuator in order for the actuator to be actuated at a high speed. Moreover, since the stiffness of the actuator is controlled in real time, a speed of the actuator may be controlled in real time.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: April 2, 2019
    Assignee: SNU R&DB Foundation
    Inventors: Sung Hoon Ahn, Sung Hyuk Song
  • Patent number: 10201834
    Abstract: An ultrasound observation apparatus includes: a sheet including a first transducer, a first transducer region, a columnar portion, and a film portion configured to connect a plurality of first upper electrodes in the first transducer region and a second surface of the columnar portion in an arrangement direction C; and a bonding portion provided between the first transducer positioned on a second end portion in the first transducer region and the columnar portion and configured to maintain a state in which the sheet is rounded such that the film portion becomes an external surface, and the first transducer positioned on the second end portion and a first surface of the columnar portion are attached to each other.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: February 12, 2019
    Inventor: Sunao Sato
  • Patent number: 10200772
    Abstract: A display apparatus includes a display panel which displays an image and a vibration member attached to a surface of the display panel, where the vibration member receives a sound signal, generates a vibration in response to the sound signal, and transfers the vibration to the display panel to allow the display panel to output a sound.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: February 5, 2019
    Inventors: Yi Joon Ahn, Yongchang Park, WonSang Park, Jongin Baek, Yong-Suk Yeo, Taehee Lee
  • Patent number: 10149660
    Abstract: To address limitations of conventional transducers, a phased array transducer is provided with a form factor suitable o for packaging into, e.g., an endoscope. A method of manufacture of small packaging transducers is also provided, whereby the overall package size is reduced by electrically connecting signal wires to array electrodes at an angle approximately normal to the array surface, thus largely eliminating the bend radius requirements of conventional printed circuit boards or flex circuits.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: December 11, 2018
    Inventors: Andre B. Bezanson, Robert B. A. Adamson, Jeremy A. Brown
  • Patent number: 10147870
    Abstract: A method for producing a porous piezoelectric polymer film with a dense surface, includes depositing a polymer solution onto a substrate to form a polymer film including a solvent; evaporating a portion of the solvent to form the dense surface away from the substrate; forming water droplets in interior of the polymer film; and substantially evaporating the water droplets and remaining solvent to form porous interior. A piezoelectric composition includes a piezoelectric material with a porous interior and a dense surface for interfacing with an electrode. A piezoelectric device includes a first electrode; a porous piezoelectric film with a dense surface and porous interior, wherein the porous piezoelectric film is deposited on the first electrode and the dense surface is away from the first electrode; and a second electrode deposited on the dense surface for, together with the first electrode, providing an electrical interface for the porous piezoelectric film.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: December 4, 2018
    Inventors: John X. J. Zhang, Dajing Chen
  • Patent number: 10119943
    Abstract: A couplant and an arrangement of a couplant include a transducer and a construction component. The couplant is adapted to couple the transducer to a surface of the construction component. The couplant comprises basically 15% to 75% mass portion of hard metal.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: November 6, 2018
    Inventors: Joseph Erskine, Keith Hamilton, Gerard McGoogan, Tim Smith, Allan Thomson, Mairi Joan Torrie, Sebastian Ziegler, Andreas Clemens Van Der Ham
  • Patent number: 9925562
    Abstract: A vibrator includes a piezoelectric element deformed when power is applied thereto, an installation member having the piezoelectric element installed thereon, and a plurality of elastic members connected to the installation member and changing a displacement direction through deformation of the installation member. The plurality of elastic members are disposed to oppose each other.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: March 27, 2018
    Assignee: MPLUS CO., LTD.
    Inventors: Hwa Young Oh, Seung Hyeon Jeong
  • Patent number: 9826960
    Abstract: A low power ultrasound system for use in sonography applications, including vascular imaging, is disclosed. The low power ultrasound system includes a base unit having an image processor and a display. An ultrasound probe is operably connected to the base unit. The probe includes a head portion including an array of crystal transducers. A plurality of pulser/receiver modules that cause the transducers to emit ultrasonic transmit pulses are also included in the probe. The pulser/receiver modules are further configured to receive analog signals relating to ultrasonic echo receive pulses detected by the transducers. The probe includes a singular low noise amplifier that amplifies the analog signals, and an analog-to-digital converter that converts the analog signals to a digital signal. A wireless interface is included for enabling the digital signal to be wirelessly transmitted from the probe to the image processor of the base unit.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: November 28, 2017
    Assignee: C. R. Bard, Inc.
    Inventors: Benjamin A. Cohen, Dylan K. Robles, Shayne Messerly
  • Patent number: 9782799
    Abstract: There is provided a vibration generating apparatus including: a housing having an internal space; a vibration member having both end portions thereof fixed to the housing; and a piezoelectric element installed on the vibration member, wherein the vibration member includes a first member having the piezoelectric element installed thereon and second members disposed at both end portions of the first member, the second members being formed of a material having a higher degree of tensile strength than the first member.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: October 10, 2017
    Assignee: MPLUS CO., LTD.
    Inventors: Joon Choi, Yeon Ho Son
  • Patent number: 9780290
    Abstract: A nanometer-scale precision actuator comprises a base, an intermediate structure, an output interface, and two linear elements producing a controllable extension in the same longitudinal direction, each between a first and a second end. A first of the two elements has a first end fixed onto the intermediate structure and a second end fixed onto the base, a second of the two elements has a first end fixed onto the intermediate structure and a second end fixed to the output interface. The base and the intermediate structure are positioned in such a manner that the controllable extension of the second element produces a displacement of the actuator in a first direction and the controllable extension of the first element produces a displacement of the actuator in a second direction, opposite to the first direction, with respect to the base.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: October 3, 2017
    Inventors: Christophe Devilliers, Félix Aguilar, Julien Ducarne, Francois Barillot, Frank Claeyssen
  • Patent number: 9593721
    Abstract: The present teachings provide for a vehicle drive module including a housing, an electric motor, a transmission gear set, a differential assembly, and a pair of output members. The transmission gear set can transmit rotary power between a motor output shaft and an output of the transmission gear set. The differential assembly can include a case, a pair of pinion gears, and a pair of side gears. Each of the side gears can be meshingly engaged with the pair of pinion gears. Each output member can include a driven body and an outer flange. The driven body can have a first end drivingly coupled to one of the side gears. The outer flange can have a first side that is releasably coupled to the second end of the driven body, and a second side that is adapted to be releasably coupled to a constant velocity joint.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: March 14, 2017
    Assignee: e-AAM Driveline Systems AB
    Inventor: Mats Strandberg
  • Patent number: 9555444
    Abstract: A piezoelectric transducer is mounted in a housing. An impedance matching layer is provided between the piezoelectric transducer and the housing. The impedance matching layer includes high-permittivity regions that have a first permittivity, and low-permittivity regions that separate the high-permittivity regions and have a second permittivity. The second permittivity is lower than the first permittivity.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: January 31, 2017
    Inventors: George David Goodman, Voldi E. Maki, Jr.
  • Patent number: 9548439
    Abstract: A piezoelectric film having a porosity between 20 and 40%, a thickness ranging from tens of microns to less than a few millimeters can be used to form an ultrasonic transducer UT for operation in elevated temperature ranges, that emit pulses having a high bandwidth. Such piezoelectric films exhibit greater flexibility allowing for conformation of the UT to a surface, and obviate the need for couplings or backings. Furthermore, a method of fabricating an UT having these advantages as well as better bonding between the piezoelectric film and electrodes involves controlling porosity within the piezoelectric film.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: January 17, 2017
    Inventors: Makiko Kobayashi, Cheng-Kuei Jen
  • Patent number: 9523770
    Abstract: A method of use for parametric sonar is provided that utilizes an acoustic beam formed at a difference frequency generated by non-linear interaction of acoustic energy of primary frequencies. At least three primary frequencies are transmitted from a frequency source by amplifiers and acoustic projectors of the sonar. The non-linear interaction of the primary frequencies produces at least three difference frequencies. The difference frequencies are received by a receiver array. Increased interaction increases efficiency linearly with the number of primary frequencies used. The increased bandwidth resulting from the use of multiple center frequencies can also produce signal processing gains and signal-to-signal ratio is also improved, especially at the lower difference frequencies.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: December 20, 2016
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Anthony A Ruffa
  • Patent number: 9515248
    Abstract: There is provided a vibration generating apparatus including: an elastic member having both end portions thereof fixedly installed on a support part of a lower case; a piezoelectric element installed on one surface of the elastic member; and a mass body part connected to the elastic member to increase an amount of vibrations, wherein the mass body part is provided with protrusion portions for first contacting the lower case at the time of an external impact.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: December 6, 2016
    Assignee: MPLUS CO., LTD.
    Inventors: Dong Su Moon, Kyung Su Park, Sang Jin Lee, Jae Kyung Kim, Joon Choi, Yeon Ho Son
  • Patent number: 9502634
    Abstract: An electrically conductive contact layer (4) is provided with a joining material (9) during a method for producing a piezoelectric component (1), in particular a piezoelectric sensor (1). To this end, the electrically conductive contact layer (4) can be dipped into a paste that serves to form the joining material (9). The contact layer (4) provided with the joining material (9) is subsequently disposed between a first piezoceramic layer (2) and a second piezoceramic layer (3). The contact layer (4) is then inserted via the joining material (9) between the first piezoceramic layer (2) and the second piezoceramic layer (3), wherein a pressure is applied to the first piezocermaic layer (2) against the second piezoceramic layer (3).
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: November 22, 2016
    Assignee: Robert Bosch GmbH
    Inventors: Reinhold Melcher, Michael Guenther
  • Patent number: 9461614
    Abstract: A resonator includes a piezoelectric core, a set of electrodes, and at least one ground terminal. The electrodes are arranged on the piezoelectric core and also includes at least one input electrode having a first width and at least one output electrode having a second width that differs from the first width. The ground terminal is also on the piezoelectric core.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: October 4, 2016
    Inventors: Changhan Hobie Yun, Chengjie Zuo, Mario Francisco Velez, Daeik Daniel Kim, Jonghae Kim
  • Patent number: 9452441
    Abstract: Disclosed is a dual air-chamber fully sealed piezoelectric nebulization module including a first casing, a second casing and a piezoelectric nebulization module, and the piezoelectric nebulization module is clamped between the casings by snapping and sealing to partition the internal space in the first casing and the second casing into two independent air chambers. In this design, a peripheral portion of the piezoelectric nebulization module is packaged to reduce the energy and vibration from being absorbed or inhibited during vibration and provides a space with good support and free vibration to enhance the nebulization efficiency. In addition, the design with the two independent air chambers can achieve the double-barrier sealing and isolating effect and reduce the chance of the piezoelectric nebulization module being corroded or damaged.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: September 27, 2016
    Inventors: Shu-Pin Hsieh, Yung-Hsing Tung, Chien-Hua Lin, Yu-Chung Hsu, Chih-Jui Shen, Chi-Shan Hung, Ben Lo
  • Patent number: 9445200
    Abstract: The present disclosure relates to a piezoelectric speaker having a weight that enables a frequency response characteristic of the piezoelectric speaker to be uniform by disposing a weight of a flexible material on an acoustic diaphragm or on and below an acoustic diaphragm of the piezoelectric speaker, thereby enhancing flatness of sound. The piezoelectric speaker having the weight includes a piezoelectric device having a piezoelectric layer and an electrode formed on or on and below the piezoelectric layer to apply an electrical signal to the piezoelectric layer; an acoustic diaphragm having a wider area than the piezoelectric device and bonded on one surface of the piezoelectric device; a frame disposed in a form that surrounds a side surface of the acoustic diaphragm; and a weight disposed above the acoustic diaphragm or above and below the acoustic diaphragm on which the piezoelectric device is disposed to thereby control a vibration.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: September 13, 2016
    Inventors: Hye Jin Kim, Woo Seok Yang
  • Patent number: 9390739
    Abstract: A PZT microactuator such as for use in a hard disk drive has a restraining layer bonded on its side that is opposite the side on which the PZT will be mounted. The restraining layer comprises a stiff and resilient material such as stainless steel. The restraining layer can cover all of the top of the PZT, or most of the top of the PZT with an electrical connection being made to the PZT where it is not covered by the restraining layer. The restraining layer reduces bending of the PZT as mounted and hence increases effective stroke length, or reverses the sign of the bending which increases the effective stroke length of the PZT even further.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: July 12, 2016
    Inventors: Long Zhang, Peter Hahn, Kuen Chee Ee
  • Patent number: 9357312
    Abstract: A localized multimodal haptic system includes one or more electromechanical polymer (EMP) transducers, each including an EMP layer, such as an electrostrictive polymer active layer. In some applications the EMP transducer may perform an actuator function or a sensor function, or both. The EMP polymer layer has a first surface and a second surface on which one or more electrodes are provided. The EMP layer of the EMP actuator may be 5 microns thick or less. The EMP transducers may provide local haptic response to a local a stimulus. In one application, a touch sensor may be associated with each EMP transducer, such that the haptic event at the touch sensor may be responded to by activating only the associated EMP transducer. Furthermore, the EMP transducer may act as its own touch sensor. A variety of haptic responses may be made available. The EMP transducers may be used in various other applications, such as providing complex surface morphology and audio speakers.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: May 31, 2016
    Assignee: Novasentis, Inc.
    Inventors: Christophe Ramstein, M. Fabrice Domingues Dos Santos
  • Patent number: 9333535
    Abstract: A micromachined ultrasonic transducer (MUT) circuit, which has a MUT with a MUT membrane that can vibrate back and forth to transmit an ultrasonic wave, electrically controls the movement of the MUT membrane by controllably transferring energy to the MUT membrane, thereby allowing the MUT membrane to transmit substantially any desired ultrasonic wave.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: May 10, 2016
    Inventors: David Brian Barkin, Joshua Posamentier, Ira Oaktree Wygant
  • Patent number: 9276454
    Abstract: An electromagnetic actuator includes a stator unit having N poles having the width LP, and at least one coil surrounding one of the poles, wherein N?3, and a magnetic portion, which is movable, relative to the stator unit, in a direction of relative movement and over a course of travel C, and including N+1 magnetized areas, the magnetizations of which are perpendicular to the relative movement direction and in alternate directions. The magnetic portion includes a yoke for closing off the magnetic fluxes passing through the magnetized areas, the course of travel C of the magnetic portion being less than or equal to the width LP of each pole, and the thickness of the magnetized areas perpendicular to the direction of movement being less than the course of travel C of the magnetic portion.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: March 1, 2016
    Inventors: Richard Arlot, Guillaume Loussert
  • Patent number: 9183829
    Abstract: A system includes a processor and a phased array, coupled to the processor, having an arrayed waveguide for acoustic waves to enable directional sound communication.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: November 10, 2015
    Assignee: Intel Corporation
    Inventors: Sasikanth Manipatruni, Kelin J. Kuhn, Debendra Mallik, John C. Johnson
  • Patent number: 9140668
    Abstract: A device for detecting at least one substance may include a resonator which, on its surface facing away from the carrier, is provided with a chemically sensitive layer for selectively binding a substance that is to be detected. An acoustic mirror is arranged between the carrier and the resonator. The acoustic mirror constitutes a band elimination filter having two closely adjacent notch frequencies, as a result of which the device is capable of oscillating in two resonant frequencies. The mass binding of the substance and the temperature can be determined computationally from the measured resonant frequencies.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: September 22, 2015
    Inventor: Martin Nirschl
  • Patent number: 9117468
    Abstract: A PZT microactuator such as for a hard disk drive has a restraining layer bonded on its side that is opposite the side on which the PZT is mounted. The restraining layer comprises a stiff and resilient material such as stainless steel. The restraining layer can cover all of the top of the PZT, or most of the top of the PZT with an electrical connection being made to the PZT where it is not covered by the restraining layer. The restraining layer reduces bending of the PZT as mounted and hence increases effective stroke length, or reverses the sign of the bending which increases the effective stroke length of the PZT even further.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: August 25, 2015
    Inventors: Long Zhang, Peter Hahn, Kuen Chee Ee
  • Patent number: 9097569
    Abstract: An ultrasonic transducer for use in a fluid medium includes at least one housing, e.g., a sleeve, which has at least one interior space, and at least one transducer core having at least one electroacoustic transducer element is accommodated in the interior space. The housing has a housing wall at least partially enclosing the transducer core using at least one hollow space.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: August 4, 2015
    Inventors: Roland Mueller, Gerhard Hueftle, Michael Horstbrink, Tobias Lang, Sami Radwan, Bernd Kuenzl, Roland Wanja
  • Patent number: 8997590
    Abstract: A multi-part mounting device for an ultrasonic transducer, the mounting device comprising a first part configured to mount the mounting device on a housing of an ultrasonic test probe, and a second part configured to retain the ultrasonic transducer, wherein the second part is at least in touching contact with the ultrasonic transducer, wherein the second part comprises a first plastic and is connected by positive fit to the first part, and wherein the first part has a greater hardness than the second part.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: April 7, 2015
    Assignee: GE Sensing & Inspection Technologies GmbH
    Inventors: York Oberdoerfer, Judith Duerscheid, Jochen Zilz, Willi Warkowski, Marek Parusel
  • Patent number: 8981618
    Abstract: A tunable acoustic resonator device has a piezoelectric medium as a first thin film layer and a tunable crystal medium as a second thin film layer. The tunable crystal medium has a first acoustic behavior over an operating temperature range under a condition of relatively low applied stress and a second acoustic behavior under a condition of relatively high applied stress. The acoustic behaviors are substantially different and, consequently, the different levels of applied stress are used to tune the acoustic resonator device. Compared with the tunable resonator device consisting of only tunable crystal medium, a device having both the piezoelectric and tunable crystal medium has advantages such as larger inherent bandwidth and less nonlinearity with AC signals. The device also requires a smaller applied stress (i.e. bias voltage) to achieve the required frequency tuning.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: March 17, 2015
    Assignee: Cymatics Laboratories Corp.
    Inventors: Rajarishi Sinha, L. Richard Carley, Deok-Yang Kim
  • Publication number: 20150045701
    Abstract: An ultrasonic actuated unit includes an intermediary portion continuous with an ultrasonic transmitting portion or connected to the ultrasonic transmitting portion at a node position of a longitudinal vibration, and a noncontact vibrating portion extending in directions parallel to a longitudinal axis without contacting the ultrasonic transmitting portion, an imprecise vibration being transmitted to the noncontact vibrating portion from the ultrasonic transmitting portion via the intermediary portion. The ultrasonic actuated unit includes a vibration absorbing portion absorbing the imprecise vibration transmitted to the noncontact vibrating portion.
    Type: Application
    Filed: October 27, 2014
    Publication date: February 12, 2015
    Inventor: Tsunetaka AKAGANE
  • Publication number: 20150043095
    Abstract: The present invention provides optical systems, devices and methods which utilize one or more electroactive polymer actuators to provide shutter and/or aperture control.
    Type: Application
    Filed: September 23, 2014
    Publication date: February 12, 2015
    Inventors: Michael Gabriel Lipton, Ilya Polyakov, Jonathan R. Heim
  • Publication number: 20150036346
    Abstract: The present invention concerns a method for manufacturing a resonator in a substrate characterized in that it includes the following steps: a) modifying the structure of at least one region of the substrate in order to make said at least one region more selective; b) etching said at least one region in order to selectively manufacture said resonator.
    Type: Application
    Filed: December 20, 2012
    Publication date: February 5, 2015
    Applicant: The Swatch Group Research and Development Ltd
    Inventors: Thierry Hessler, Silvio Dalla Piazza
  • Publication number: 20150008794
    Abstract: A lower surface of a circular support plate made of resin is fixed to an upper surface of a ring-shaped frame. A circular through hole is provided in a center portion of the support plate, a lower surface of a circular metal plate is fixed to a portion of an upper surface of the support plate positioned at the circumference of the through hole. An upper-groove is provided in a ring shape positioned inward of an upper surface of the metal plate. A shock absorbing member made of elastic materials is provided in the upper groove of the metal plate. A piezoelectric element is provided on a portion of the upper surface of the metal plate positioned inward from the shock absorbing member, and a portion of an upper surface of the shock absorbing member positioned on an inner periphery portion of the shock absorbing member.
    Type: Application
    Filed: October 4, 2012
    Publication date: January 8, 2015
    Inventors: Yasuharu Onishi, Yukio Murata, Yuichiro Kishinami, Motoyoshi Komoda
  • Publication number: 20140346927
    Abstract: There is provided a vibration generating apparatus including: a housing having an internal space; a vibrator disposed and vibrating within the housing; and a plurality of damper members installed in at least one of the housing and the vibrator and formed of different materials, wherein the plurality of damper members are overlapped and formed integrally with each other or are disposed to be adjacent to each other.
    Type: Application
    Filed: August 5, 2013
    Publication date: November 27, 2014
    Inventor: Dong Sun Park
  • Publication number: 20140339958
    Abstract: Provided is a piezoelectric vibrating device including a case provided with a certain space therein, a piezoelectric vibrating member provided in the case and vibrating according to an applied voltage, a weight member provided in the case and connected to a part of the piezoelectric vibrating member in a vibration direction of the piezoelectric vibrating member, and a limitation member for limiting movement of the weight member.
    Type: Application
    Filed: May 19, 2014
    Publication date: November 20, 2014
    Inventors: In Kil PARK, Tae Hyung NOH, Seong Cheol PARK, Young Sul KIM, Byung Yul CHOI, Hyun Chul JUNG, Soon Dong CHOI
  • Publication number: 20140285064
    Abstract: There is provided a vibration generating apparatus including a vibration transferring member transferring vibrations to outside the vibration generating apparatus, an elastic member having one or more end portions fixed to the vibration transferring member, a mass body vibrating in response to vibrations of the elastic member, and a piezoelectric element installed on one surface of the elastic member so as to be disposed to face the mass body. A lower surface of the mass body has step parts in order to prevent contact between the mass body and the piezoelectric element. The lower surface of the mass body in which the step parts are formed and the piezoelectric element are disposed so as to be spaced apart from each other by a predetermined distance.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 25, 2014
    Inventors: Jae Kyung Kim, Yeon Ho Son, Sang Jin Lee, Dong Su Moon, Hwa Young Oh
  • Patent number: 8841823
    Abstract: A wear cap including a flexible barrel and a rigid disc enables a high-frequency ultrasonic transducer to properly align to the surface of a material to be tested. The wear cap may be employed for any type of contact sensor that requires a protective wear cap and that needs to align to the surface of a material to be tested. An ultrasonic transducer assembly includes a wear cap and an ultrasonic transducer. The ultrasonic transducer is mounted in the wear cap and includes a transducer body with a cylindrical shape. A method of producing a wear cap for an ultrasonic transducer includes selecting a flexible material, forming a flexible barrel from the flexible material, selecting a rigid material, forming a rigid disc from the rigid material, and affixing the rigid disc to an end of the flexible barrel.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: September 23, 2014
    Assignee: Ascent Ventures, LLC
    Inventor: Todd Jackson
  • Publication number: 20140265727
    Abstract: An ultrasonic transducer having a membrane and a container having a base and at least one wall element. The one or more wall elements can be situated over at least part of the base to form a cavity that can have an at least partially open end. The open end can be sealed with the membrane and the interior of the container can be maintained at a lower atmospheric pressure than the ambient pressure. Within the container, a piezoelectric flexure can be fixed at one end to a location at a wall element. The other end of the flexure can be in mechanical communication with the membrane, either directly or through a stiffener that is itself in communication with the membrane.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: uBeam Inc.
    Inventor: Marc Berte
  • Publication number: 20140265730
    Abstract: An illustrative embodiment of a damper for use with rotary machinery may include a damper mass connected to an electronics housing via one or more piezo elements. The illustrative embodiment of the damper may include one or more electrical components wherein the electrical components, piezo elements, and/or damper mass may be tuned such that the damper is configured with an electrical resonance frequency corresponding to a mechanical resonance frequency present in a component of the rotary machinery. The piezo elements may be extension/retraction type or bending type, and they may have any orientation with respect to the rotational axis of the rotary machinery depending on the specific embodiment and/or application of the damper.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: Waukesha Bearings Corporation
    Inventor: Michael K. Swann
  • Patent number: 8797152
    Abstract: A haptic actuator apparatus and a method of making the same include an ultrasonically vibrating motor and its housing. The housing includes a guide structure coupled to the ultrasonically vibrating motor and at least one spring. The guide structure defines at least one path of motion of the ultrasonically vibrating motor. The at least one spring delimits the at least one path and generates human-detectable vibrations in response to an impact with the ultrasonically vibrating motor.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: August 5, 2014
    Assignee: New Scale Technologies, Inc.
    Inventors: David Henderson, Qin Xu
  • Publication number: 20140210312
    Abstract: According to one embodiment, a method of damping an actuator to reduce an amplitude of a resonance peak of the actuator, including a piezoelectric element and a translation mechanism, includes securing one surface of a restraint member having at least two surfaces to a movable part of the translation mechanism with an elastic or viscoelastic body therebetween, securing the other surface of the restraint member to a support portion of the translation mechanism with an elastic or viscoelastic body therebetween, and converting vibration energy of the movable part into thermal energy, based on distortion caused by deformation of the elastic or viscoelastic body.
    Type: Application
    Filed: January 23, 2014
    Publication date: July 31, 2014
    Applicant: Akita Prefecture
    Inventor: Shigeki Mori
  • Patent number: 8792307
    Abstract: The disclosure, in one aspect, provides an apparatus that includes an acoustic transducer and a backing in contact with a side of the transducer. The backing includes substantially unidirectional fibers in a matrix of a material that has high shear wave acoustic attenuation. The fibers contact the side of the transducer at an angle configured to convert substantially all of the compressional waves that enter the backing for the transducer into shear waves, which shear waves are then attenuated by the matrix of the backing material.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: July 29, 2014
    Assignee: Baker Hughes Incorporated
    Inventor: Rocco DiFoggio
  • Publication number: 20140203686
    Abstract: Provided are a resonator and a method of fabricating the same. The resonator may include a first electrode disposed on a substrate, a piezoelectric layer disposed on the first electrode, a second electrode disposed on the piezoelectric layer, and a control layer disposed on the second electrode and having a frame with an uneven surface.
    Type: Application
    Filed: November 6, 2013
    Publication date: July 24, 2014
    Inventors: In Sang Song, Ho Soo Park, Duck Hwan Kim, Chul Soo Kim, Sang Uk Son, Jae Shik Shin, Moon Chul Lee
  • Patent number: 8779649
    Abstract: An ultrasonic transducer includes a case having a closed end in the main axis direction, a piezoelectric element located substantially at the center of the closed end of the case, and a body arranged inside the case so as to be opposed to the piezoelectric element. The body has an irregular surface opposed to and spaced from the piezoelectric element.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: July 15, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Hironori Sakai
  • Publication number: 20140167561
    Abstract: An ultrasonic vibration apparatus includes a vibrator, wherein the vibrator includes at least two vibration elements to generate ultrasonic vibration when a driving voltage is applied to the vibration elements, at least three electrode portions wherein the vibration elements and the electrode portions is alternately arranged side by side in a vibrating direction, at least the three electrode portions includes at least two first electrode portions and at least one second electrode portion alternately arranged in the vibrating direction, the vibrator integrally vibrates ultrasonically in the vibrating direction when the driving voltage is applied to the first electrode portions and the second electrode portion, and a bridging portion coupling and electrically connecting two first electrode portions of at least the two first electrode portions with each other, and the ultrasonic vibration apparatus further includes an anti-vibration portion to suppress vibration of the bridging portion in any other direction exc
    Type: Application
    Filed: February 24, 2014
    Publication date: June 19, 2014
    Inventors: Yuji Hirai, Masashi Yamada, Machiko Koshigoe
  • Patent number: 8754571
    Abstract: A two-axis inertial positioner comprises a cascaded stack of orthogonal actuators mounted on a base and a platform frictionally mounted to the top surface of one of the actuators. An alignment cartridge overlies the platform and a clamp block overlies the alignment cartridge. Ball and groove bearings are provided between the platform, alignment cartridge and clamp block to provide two axes of motion corresponding to the two operational axes of the actuators.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: June 17, 2014
    Inventor: Sergiy Pryadkin
  • Patent number: 8707549
    Abstract: The present invention relates to ultrasound transducers for ultrasonic imaging systems and, in particular, to improved grip assemblies for ultrasound transducers. One grip assembly includes a locking plate defining first and second apertures and a coupling post extending from the locking plate. An interface plate has a first elongate extension being extendable at least partially through the first aperture and a second elongate extension being extendable at least partially through the second aperture. A handle is coupled to the locking plate and includes a grip, a coupling interface, and a neck extending between the grip and the coupling interface. The coupling interface defines a coupling aperture for receiving the coupling post.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: April 29, 2014
    Assignee: Boise State University
    Inventors: Joie Burns, Michelle Sabick, Seth Kuhlman, Carly Lockard, Brittany Siewert
  • Patent number: RE45464
    Abstract: The present invention relates to animated devices that include one or more electroactive polymer transducers. When actuated by electrical energy, an electroactive polymer produces mechanical deflection in one or more directions. This deflection may be used to produce motion of a feature included in an animated device. Electroactive polymer transducers offer customizable shapes and deflections. Combining different ways to configure and constrain a polymer, different ways to arrange active areas on a single polymer, different animated device designs, and different polymer orientations, permits a broad range of animated devices that use an electroactive polymer transducer to produce motion. These animated devices find use in a wide range of animated device applications.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: April 14, 2015
    Inventors: Roy D. Kornbluh, Ronald E. Pelrine, Qibing Pei, Joseph S. Eckerle