Patents by Inventor Sadayuki Ueha

Sadayuki Ueha has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7851972
    Abstract: It is an subject of the present invention to provide a vibration actuator in which a plurality of rotors can be driven by a single vibration unit. When a composite vibrator (2) is driven to generate a composite vibration combining a plurality of vibrations, a first stator (3) and a second stator (4) vibrate, thereby causing elliptical movements in corner portions (8) and (9) of the first stator (3) and the second stator (4), respectively. As a result, a first rotor (A) abutting onto and pressurized against the corner portion (8) of the first stator (3) and a second rotor (B) abutting onto and pressurized against the corner portion (9) of the second stator (4) are rotated at the same time. Further, in this case, by selecting vibration modes of the plurality of vibrations constituting the composite vibration, the two rotors (A) and (B) can be rotated in the same direction or in opposite directions with respect to each other.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: December 14, 2010
    Assignees: Kabushiki Kaisha Toyota Jidoshokki, Tokyo Institute of Technology
    Inventors: Masaki Takasan, Hirohiko Ishikawa, Kazuo Seiki, Kentaro Nakamura, Sadayuki Ueha
  • Publication number: 20090267450
    Abstract: It is an subject of the present invention to provide a vibration actuator in which a plurality of rotors can be driven by a single vibration unit. When a composite vibrator (2) is driven to generate a composite vibration combining a plurality of vibrations, a first stator (3) and a second stator (4) vibrate, thereby causing elliptical movements in corner portions (8) and (9) of the first stator (3) and the second stator (4), respectively. As a result, a first rotor (A) abutting onto and pressurized against the corner portion (8) of the first stator (3) and a second rotor (B) abutting onto and pressurized against the corner portion (9) of the second stator (4) are rotated at the same time. Further, in this case, by selecting vibration modes of the plurality of vibrations constituting the composite vibration, the two rotors (A) and (B) can be rotated in the same direction or in opposite directions with respect to each other.
    Type: Application
    Filed: February 21, 2007
    Publication date: October 29, 2009
    Inventors: Masaki Takasan, Hirohiko Ishikawa, Kazuo Seiki, Kentaro Nakamura, Sadayuki Ueha
  • Patent number: 6802220
    Abstract: An apparatus levitates and transports an object. The apparatus levitates the object above the surfaces of a plurality of vibrators by air pressure of sound waves that are generated by the vibrators. The apparatus has a plurality of vibration devices, each of which corresponds to one of the vibrators. Each vibration device includes a first transducer for vibrating the corresponding vibrator. Each transducer includes a super-magnetostrictive material. A common power source is connected to at least two of the first transducers for actuating the first transducers.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: October 12, 2004
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Masaki Takasan, Yoshikazu Koike, Sadayuki Ueha
  • Patent number: 6637585
    Abstract: An apparatus for levitating and transporting an object includes a pair of elongated vibrators, a pair of oscillators and a pair of flection limiting rods. Each oscillator includes a horn and a transducer and corresponds to one of the vibrators. Each transducer vibrates the corresponding vibrator through the corresponding horn to generate sound waves from the vibrator. The object is levitated by radiation pressure of the sound waves. Each flection limiting rod corresponds to one of the vibrators. Each rod contacts the lower surface of the corresponding vibrator at a position where the displacement due to vibration is relatively small and reduces the flection of the vibrator due to the weight of the vibrator and the weight of the transported object.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: October 28, 2003
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Masaki Takasan, Yoshikazu Koike, Sadayuki Ueha
  • Patent number: 6609609
    Abstract: A method of controlling an object levitating apparatus is disclosed. The levitating apparatus levitates an object on a plurality of vibrating bodies with air pressure generated from sound waves produced by the vibrating bodies. Each vibrating body is vibrated by a corresponding vibrating apparatus. Each vibrating apparatus has an oscillator and a transducer. The transducer is actuated by the oscillator to vibrate the corresponding vibrating body. The method includes determining impedance of each transducer, and controlling each oscillator in accordance with the determined impedance to restrict displacement of the levitated object.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: August 26, 2003
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Masaki Takasan, Yoshikazu Koike, Sadayuki Ueha
  • Publication number: 20020088280
    Abstract: An apparatus levitates and transports an object. The apparatus levitates the object above the surfaces of a plurality of vibrators by air pressure of sound waves that are generated by the vibrators. The apparatus has a plurality of vibration devices, each of which corresponds to one of the vibrators. Each vibration device includes a first transducer for vibrating the corresponding vibrator. Each transducer includes a super-magnetostrictive material. A common power source is connected to at least two of the first transducers for actuating the first transducers.
    Type: Application
    Filed: October 25, 2001
    Publication date: July 11, 2002
    Inventors: Masaki Takasan, Yoshikazu Koike, Sadayuki Ueha
  • Publication number: 20020088693
    Abstract: An apparatus for levitating and transporting an object includes a pair of elongated vibrators, a pair of oscillators and a pair of flection limiting rods. Each oscillator includes a horn and a transducer and corresponds to one of the vibrators. Each transducer vibrates the corresponding vibrator through the corresponding horn to generate sound waves from the vibrator. The object is levitated by radiation pressure of the sound waves. Each flection limiting rod corresponds to one of the vibrators. Each rod contacts the lower surface of the corresponding vibrator at a position where the displacement due to vibration is relatively small and reduces the flection of the vibrator due to the weight of the vibrator and the weight of the transported object.
    Type: Application
    Filed: November 5, 2001
    Publication date: July 11, 2002
    Inventors: Masaki Takasan, Yoshikazu Koike, Sadayuki Ueha
  • Publication number: 20020054812
    Abstract: A method of controlling an object levitating apparatus is disclosed. The levitating apparatus levitates an object on a plurality of vibrating bodies with air pressure generated from sound waves produced by the vibrating bodies. Each vibrating body is vibrated by a corresponding vibrating apparatus. Each vibrating apparatus has an oscillator and a transducer. The transducer is actuated by the oscillator to vibrate the corresponding vibrating body. The method includes determining impedance of each transducer, and controlling each oscillator in accordance with the determined impedance to restrict displacement of the levitated object.
    Type: Application
    Filed: September 19, 2001
    Publication date: May 9, 2002
    Inventors: Masaki Takasan, Yoshikazu Koike, Sadayuki Ueha
  • Patent number: 5807250
    Abstract: A bone assessment apparatus for obtaining an assessment value E for a bone 12 with good repeatability by simple calculation using the waveform of a signal derived from received ultrasound which has passed through the bone. A transmitting transducer (20) transmits an ultrasound pulse. A receiving transducer (22) receives the ultrasound pulse which has passed through a test sample (10), and then converts the received ultrasound pulse to a signal. An A/D converter (30) digitizes the signal amplified in a receiving amplifier (28). The digitized signal is inputted to a calculator (32) via a transducer controller (26). The calculator (32) calculates the assessment value E for the bone (12) from characteristic values of the waveform of the signal, such as the half-value width of the first positive portion, which are derived from ultrasonic transmission characteristics of the bone (12).
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: September 15, 1998
    Assignees: Aloka Co., Ltd., Sadayuki Ueha
    Inventors: Naoki Ohtomo, Sadayuki Ueha
  • Patent number: 5191688
    Abstract: An ultrasonic motor including a driving member and a driven member, the driving member comprising a plate- or rod-like elastic member, a flexural vibrator fixed to the elastic member and causing the elastic member to induce a standing wave type flexural vibration upon application of an AC voltage thereto, and a longitudinal vibrator provided on a node line of the flexural vibration at the surface of the elastic member, the longitudinal vibrator being pivoted about the node line by the flexural vibrator and adapted to expand and contract in an amplitude direction of the flexural vibration upon application of an AC voltage thereto, the driven member being brought into pressure contact with an end face of the longitudinal vibrator. The longitudinal vibrator is expanded or contracted in synchronism with the flexural vibration, whereby the driving member and the driven member are moved relatively to each other.
    Type: Grant
    Filed: December 12, 1991
    Date of Patent: March 9, 1993
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Hiroyuki Takizawa, Sumio Kawai, Sadayuki Ueha
  • Patent number: 5136200
    Abstract: An ultrasonic motor including a driving member and a driven member, the driving member comprising a plate- or rod-like elastic member, a flexural vibrator fixed to the elastic member and causing the elastic member to induce a standing wave type flexural vibration upon application of an AC voltage thereto, and a longitudinal vibrator provided on a node line of the flexural vibration at the surface of the elastic member, the longitudinal vibrator being pivoted about the node line by the flexural vibrator and adapted to expand and contract in an amplitude direction of the flexural vibration upon application of an AC voltage thereto, the driven member being brought into pressure contact with an end face of the longitudinal vibrator. The longitudinal vibrator is expanded or contracted in synchronism with the flexural vibration, whereby the driving member and the driven member are moved relatively to each other.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: August 4, 1992
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Hiroyuki Takizawa, Sumio Kawai, Sadayuki Ueha
  • Patent number: 4965482
    Abstract: An ultrasonic motor has a longitudinal-torsional composite transducer, a stator constituted by an ultrasonic vibrator sandwiching the transducer, and a rotor urged against the stator. The stator excites longitudinal-torsional ultrasonic vibrations to rotate the rotor by a frictional force. The motor includes a vibration adjusting rod for matching resonance frequencies of longitudinal and torsional ultrasonic vibrations of the stator with each other.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: October 23, 1990
    Assignee: NEC Corporation
    Inventors: Osamu Ohnishi, Sadayuki Takahashi, Osamu Myohga, Tadao Uchikawa, Takeshi Inoue, Isao Kagaya, Sadayuki Ueha
  • Patent number: 4955598
    Abstract: A paper feeding apparatus comprises a flexible vibrating body made of an elastic matter. The body is excited with a resonant frequency so as to produce a progressive wave. A driving vibrator is fixed to one end of the flexible vibrating body, and a receiving vibrator is fixed to the other end thereof. A mechanism is included for urging paper against the flexible vibrating body, so that when the vibrating body is excited, the paper is conveyed.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: September 11, 1990
    Assignees: Fuji Xerox Co., Ltd., Sadayuki Ueha
    Inventors: Ken Hiroshige, Sadayuki Ueha
  • Patent number: 4885499
    Abstract: An ultrasonic driven type motor in which an ultrasonic torsional vibrator is activated to generate a forward turning torque for driving a rotor synchronously with the expansion of at least one piezoelectric actuator provided between the vibrator and the rotor, and to generate a return turning torque synchronously with the constriction of the piezoelectric actuator, and the piezoelectric actuator has a coupling control characteristic so that only the forward turning torque is selectively transmitted to the rotor.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: December 5, 1989
    Assignee: NGK Spark Plug Co., Inc.
    Inventors: Sadayuki Ueha, Minoru Kurosawa, Michiyuki Masuda
  • Patent number: 4734610
    Abstract: A vibration wave motor includes circular shape vibration part having a helical stepped portion inside or outside thereof; a unit, coupled to said vibration part for causing the vibration part to generate a travelling vibration wave propagating along a circumferential direction of the vibration part; and a movable part having a stepped portion threadably engaged with the helical stepped portion, the movable part being frictionally driven by the travelling vibration wave generated by the vibration part.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: March 29, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ichiro Okumura, Hitoshi Mukohjima, Sadayuki Ueha
  • Patent number: 4634916
    Abstract: A rotary driver is disclosed, which comprises a solenoidal oscillation element consisting of an electrostriction element polarized in radial directions or vertical directions and provided with electrodes on pair opposite surfaces perpendicular to the direction of polarization. The electrode on either one of the pair opposite surfaces is uniformly divided by x greater than four. AC voltages of V.sub.o sin .omega.t shifted in phase from each other by 2.pi./x are applied to the division electrodes. A driven member is held in contact with at least one of the opposite surfaces of the solenoidal oscillation element.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: January 6, 1987
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Kozo Okada, Michiyuki Masuda, Sadayuki Ueha