Patents by Inventor Yusuke Adachi

Yusuke Adachi 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: 7545085
    Abstract: Internal electrode layers (5) include a common electrode layer (3) and feed electrode layers (6) alternately placed in a stacking direction with piezoelectric layers (1) interposed between the common electrode layer (3) and the feed electrode layers (6). The common electrode layer (3) has a common electrode (3a). The feed electrode layers (6) include a first feed electrode layer (6a) and a second feed electrode layer (6b). The first feed electrode layer (6) has a pair of electrically continuous first electrodes (2, 2) disposed on two areas (A2, A4) opposed along a first-diagonal-line direction (D1) of the principal surface of the associated piezoelectric layer (1) among four areas (A1 through A4) defined by dividing the principal surface of the associated piezoelectric layer (1) into two parts in the longitudinal and transverse directions (L) and (S).
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: June 9, 2009
    Assignee: Panasonic Corporation
    Inventor: Yusuke Adachi
  • Publication number: 20090091213
    Abstract: An ultrasonic actuator includes: a piezoelectric element 10 producing stretching and bending vibrations; driver elements 2, 2 placed on the piezoelectric element 10 so as to be actuated in accordance with the vibrations of the piezoelectric element 10, thereby outputting a driving force; a case 12 for supporting the piezoelectric element 10; and wall-surface supporters 6A and 6B, top-surface supporters 7A and 7B and a bottom-surface supporting part 8 all placed between the case 12 and the piezoelectric element 10 to previously apply compressive forces to non-node parts of the vibrations of the piezoelectric element 10 along the directions of the vibrations.
    Type: Application
    Filed: January 9, 2007
    Publication date: April 9, 2009
    Inventor: Yusuke Adachi
  • Publication number: 20090072665
    Abstract: An ultrasonic actuator includes: a piezoelectric element 10 for generating various kinds of vibrations having different vibration directions; a driver element provided on the piezoelectric element 10 and actuated in accordance with the vibration of the piezoelectric element 10 to output driving force toward a certain driving direction; feeding electrodes 8 provided on the piezoelectric element 10 and electrically connected to the piezoelectric element 10; and feeding-supporting parts 6A, 6B, 7A, 7B and 9A abutting the feeding electrodes to elastically support the actuator body and serving as feeding terminals for supplying a voltage to the feeding electrodes 8.
    Type: Application
    Filed: December 5, 2006
    Publication date: March 19, 2009
    Inventors: Yusuke Adachi, Hiroshi Fukushima
  • Publication number: 20090026884
    Abstract: An ultrasonic actuator includes: a piezoelectric element 1 for generating a bending vibration and a stretching vibration; and a driver element 2 attached to a surface of the piezoelectric element 1 facing the direction of the bending vibration in point contact with the piezoelectric element 1 and actuated in accordance with the vibration of the piezoelectric element 1 to output driving force.
    Type: Application
    Filed: December 14, 2006
    Publication date: January 29, 2009
    Inventors: Yusuke Adachi, Hiroshi Fukushima
  • Publication number: 20090025675
    Abstract: A combustion chamber structure for a direct injection diesel engine is provided which can increase recirculated amount of exhaust gas while avoiding generation of black smoke and deterioration of fuel efficiency as much as possible. Disclosed is a combustion chamber structure for a direct injection diesel engine having a cavity 10 on a top surface of a piston 9. The cavity is concave to provide a majority of the combustion chamber. Fuel is injected from a center of a cylinder top radially into an inner periphery of the cavity 10 to self-ignite. A depression 24 is formed at an outer periphery of the cavity 10 and is sunken relative to the top surface of the piston 9 to provide a step. The depression 24 has a bottom with an outer periphery gradually rising radially outwardly in modestly curved surface to the top surface of the piston 9.
    Type: Application
    Filed: February 7, 2007
    Publication date: January 29, 2009
    Applicant: HINO MOTORS, LTD.
    Inventors: Shotaro Ilkubo, Hiroshi Nakajima, Yusuke Adachi, Kiyohiro Shimokawa
  • Publication number: 20090021114
    Abstract: Internal electrode layers (5) include a common electrode layer (3) and feed electrode layers (6) alternately placed in a stacking direction with piezoelectric layers (1) interposed between the common electrode layer (3) and the feed electrode layers (6). The common electrode layer (3) has a common electrode (3a). The feed electrode layers (6) include a first feed electrode layer (6a) and a second feed electrode layer (6b). The first feed electrode layer (6) has four divided electrodes (2a through 2d) and a first connection electrode (2e) for providing connection between two of the divided electrodes (2b, 2d). The second feed electrode layer (6) has four divided electrodes (4a through 4d) and a second connection electrode (4e) for providing connection between two of the divided electrodes (4a, 4c).
    Type: Application
    Filed: January 29, 2007
    Publication date: January 22, 2009
    Inventor: Yusuke Adachi
  • Publication number: 20080278037
    Abstract: A drive unit includes a guide, a stage which is movable relative to the guide, an ultrasonic actuator for moving the movable body and a control unit for controlling the ultrasonic actuator. The ultrasonic actuator includes a driver element in contact with the stage and is fixed to the guide. A surface of the stage in contact with the driver element is an undulating surface. The control unit detects the position of the stage based on a change in contact pressure on the driver element due to the undulating surface.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 13, 2008
    Inventors: Masaru HIGASHIONJI, Hideaki MUKAE, Yusuke ADACHI, Eiichi NAGAOKA
  • Publication number: 20080278035
    Abstract: An ultrasonic actuator includes: an actuator body using a piezoelectric element and generating a plurality of vibrations of different vibration directions; a driver element provided in the actuator body and operated in accordance with the vibration of the actuator body to output a driving force in a predetermined driving direction; a case containing the actuator body; at least one support rubber provided between the actuator body and the case to elastically support the actuator body along the driving direction with respect to the case; and at least one stopper provided between the actuator body and the case which comes into contact with at least one of the actuator body and the case when the actuator body is displaced in a direction opposite the driving direction such that the displacement of the actuator body in the direction opposite the driving direction is limited.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 13, 2008
    Inventors: Masaru Higashionji, Hideaki Mukae, Yusuke Adachi, Eiichi Nagaoka
  • Publication number: 20080278033
    Abstract: A piezoelectric element is formed by stacking piezoelectric layers and internal electrode layers. The internal electrode layers are positive and negative electrode layers. The positive electrode layers are first and second positive electrode layers. The negative electrode layers are first and second negative electrode layers. Each of the first positive and negative electrode layers includes four divided electrodes and a connecting electrode for connecting a pair of the four divided electrodes formed on diagonally opposite two areas along a first diagonal direction on a principle surface of the associated one of the piezoelectric layers. Each of the second positive and negative electrode layers includes four divided electrodes and a connecting electrode for connecting a pair of the four divided electrodes formed on diagonally opposite two areas along a second diagonal direction on a principle surface of the associated one of the piezoelectric layers.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 13, 2008
    Inventors: Yusuke ADACHI, Hideaki Mukae, Masaru Higashionji, Eiichi Nagaoka
  • Publication number: 20080278032
    Abstract: A vibratory actuator includes a piezoelectric element, a driver element provided on the piezoelectric element and a movable body supported by the driver element. A control unit supplies a first voltage and a second voltage at the same frequency to the piezoelectric element. By supplying the first voltage and the second voltage having a difference phase from a phase of the first voltage by 90°, the piezoelectric element is lead to composite vibration of stretching and bending, thereby causing the driver to make an elliptical motion by the vibration and move the movable body. The control unit switches, during a fine mode, a phase difference between the first voltage and the second voltage between 90° and 0°.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 13, 2008
    Inventors: Yusuke ADACHI, Hideaki Mukae, Masaru Higashionji, Eiichi Nagaoka, Kenichi Honjo
  • Publication number: 20080272672
    Abstract: A drive unit includes a control unit for controlling an ultrasonic actuator. The control unit performs switching between a normal operation mode in which the piezoelectric element unit vibrates at a frequency close to a resonance frequency of longitudinal vibration in the lengthwise direction of the piezoelectric element unit and a resonance frequency of bending vibration to let the ultrasonic actuator output a driving force and a heating mode in which the piezoelectric element unit vibrates at a frequency close to a resonance frequency of longitudinal vibration in the thickness direction of the piezoelectric element unit to heat the piezoelectric element.
    Type: Application
    Filed: April 29, 2008
    Publication date: November 6, 2008
    Inventors: Masaru HIGASHIONJI, Hideaki Mukae, Yusuke Adachi, Eiichi Nagaoka
  • Publication number: 20080179996
    Abstract: Internal electrode layers (5) include a common electrode layer (3) and feed electrode layers (6) alternately placed in a stacking direction with piezoelectric layers (1) interposed between the common electrode layer (3) and the feed electrode layers (6). The common electrode layer (3) has a common electrode (3a). The feed electrode layers (6) include a first feed electrode layer (6a) and a second feed electrode layer (6b). The first feed electrode layer (6) has a pair of electrically continuous first electrodes (2, 2) disposed on two areas (A2, A4) opposed along a first-diagonal-line direction (D1) of the principal surface of the associated piezoelectric layer (1) among four areas (A1 through A4) defined by dividing the principal surface of the associated piezoelectric layer (1) into two parts in the longitudinal and transverse directions (L) and (S).
    Type: Application
    Filed: January 19, 2007
    Publication date: July 31, 2008
    Inventor: Yusuke Adachi
  • Patent number: 7030538
    Abstract: A low loss, small scale piezoelectric transformer, suited for a cold cathode tube load, and having a high effective coupling factor, is provided using a piezoelectric plate having a single polarization direction. Controlling the dimensions of the third electrode portion 15a constituting the high impedance portion makes it possible easily to adjust the capacitance of the electrostatic capacitor formed between the first electrode portion 12 and the third electrode portion in accordance with the load. Also, the second electrode portion 13 and the fourth electrode portion 15b constituting the low impedance portion are substantially equal in area and the third electrode portion and the fourth electrode portion are formed in one piece, so that energy propagation efficiency can be increased.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: April 18, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Nakatsuka, Katsu Takeda, Katsunori Moritoki, Hiroshi Fukushima, Yusuke Adachi
  • Publication number: 20060038466
    Abstract: A low loss, small scale piezoelectric transformer, suited for a cold cathode tube load, and having a high effective coupling factor, is provided using a piezoelectric plate having a single polarization direction. Controlling the dimensions of the third electrode portion 15a constituting the high impedance portion makes it possible easily to adjust the capacitance of the electrostatic capacitor formed between the first electrode portion 12 and the third electrode portion in accordance with the load. Also, the second electrode portion 13 and the fourth electrode portion 15b constituting the low impedance portion are substantially equal in area and the third electrode portion and the fourth electrode portion are formed in one piece, so that energy propagation efficiency can be increased.
    Type: Application
    Filed: October 13, 2005
    Publication date: February 23, 2006
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Nakatsuka, Katsu Takeda, Katsunori Moritoki, Hiroshi Fukushima, Yusuke Adachi
  • Patent number: 6755626
    Abstract: A miniature pump includes a miniature pump portion including a suction passage through which a liquid flows in, and a discharge passage through which the liquid flows out, and a bubble trap portion for blocking an entry of air bubbles into the miniature pump portion. Since the bubble trap portion prevents the entry of air bubbles into the miniature pump portion, a deterioration of pump characteristics owing to the entry of air bubbles can be suppressed, making it possible to obtain a miniature pump that achieves both a large discharge flow rate and stable discharge flow rate characteristics.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: June 29, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Atsushi Komatsu, Masayuki Okano, Katsumi Imada, Toru Ninomiya, Yusuke Adachi
  • Publication number: 20030017063
    Abstract: A miniature pump includes a miniature pump portion including a suction passage through which a liquid flows in, and a discharge passage through which the liquid flows out, and a bubble trap portion for blocking an entry of air bubbles into the miniature pump portion. Since the bubble trap portion prevents the entry of air bubbles into the miniature pump portion, a deterioration of pump characteristics owing to the entry of air bubbles can be suppressed, making it possible to obtain a miniature pump that achieves both a large discharge flow rate and stable discharge flow rate characteristics.
    Type: Application
    Filed: July 11, 2002
    Publication date: January 23, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Atsushi Komatsu, Masayuki Okano, Katsumi Imada, Toru Ninomiya, Yusuke Adachi
  • Publication number: 20020190611
    Abstract: A low loss, small scale piezoelectric transformer, suited for a cold cathode tube load, and having a high effective coupling factor, is provided using a piezoelectric plate having a single polarization direction. Controlling the dimensions of the third electrode portion 15a constituting the high impedance portion makes it possible easily to adjust the capacitance of the electrostatic capacitor formed between the first electrode portion 12 and the third electrode portion in accordance with the load. Also, the second electrode portion 13 and the fourth electrode portion 15b constituting the low impedance portion are substantially equal in area and the third electrode portion and the fourth electrode portion are formed in one piece, so that energy propagation efficiency can be increased.
    Type: Application
    Filed: June 14, 2002
    Publication date: December 19, 2002
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Nakatsuka, Katsu Takeda, Katsunori Moritoki, Hiroshi Fukushima, Yusuke Adachi