Patents by Inventor Katsumi Yamauchi

Katsumi Yamauchi 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).

  • Piezoelectric actuator having separate frictional portions
    Patent number: 11108340
    Abstract: A piezoelectric actuator (1) includes: a piezoelectric element (3); and a first frictional portion (10) and a second frictional portion (12) that are disposed on one principal surface (2d) of the piezoelectric element (3). The first frictional portion (10) is disposed at a position other than the antinodes of the piezoelectric element (3) at which a distance from one of the end surfaces (2a) is less than ? L, where L represents a length in the longitudinal direction of the piezoelectric element (3). The second frictional portion (12) is disposed at a position other than the antinodes of the piezoelectric element (3) at which a distance from the other of the end surfaces (2b) is less than ? L.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: August 31, 2021
    Assignee: TDK CORPORATION
    Inventors: Yasuyuki Satoh, Katsumi Yamauchi, Katsuya Inaba, Yoko Abe
  • PIEZOELECTRIC ACTUATOR
    Publication number: 20180219494
    Abstract: A piezoelectric actuator (1) includes: a piezoelectric element (3); and a first frictional portion (10) and a second frictional portion (12) that are disposed on one principal surface (2d) of the piezoelectric element (3). The first frictional portion (10) is disposed at a position other than the antinodes of the piezoelectric element (3) at which a distance from one of the end surfaces (2a) is less than ? L, where L represents a length in the longitudinal direction of the piezoelectric element (3). The second frictional portion (12) is disposed at a position other than the antinodes of the piezoelectric element (3) at which a distance from the other of the end surfaces (2b) is less than ? L.
    Type: Application
    Filed: January 31, 2018
    Publication date: August 2, 2018
    Applicant: TDK CORPORATION
    Inventors: Yasuyuki SATOH, Katsumi YAMAUCHI, Katsuya INABA, Yoko ABE
  • Piezoelectric sensor
    Patent number: 6800986
    Abstract: A piezoelectric device includes electrode films and piezoelectric ceramic layers. The piezoelectric ceramic layers have a number of at least 4 and are alternately laminated with the electrode films. A first support member has a first projection, whereas a second support member has a second projection. The first and second support members are arranged such that the first and second projections are opposed to each other. The piezoelectric device is disposed between the first and second projections, and is held by end faces of the first and second projections.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: October 5, 2004
    Assignee: TDK Corporation
    Inventor: Katsumi Yamauchi
  • Piezoelectric sensor
    Publication number: 20040084999
    Abstract: A piezoelectric device includes electrode films and piezoelectric ceramic layers. The piezoelectric ceramic layers have a number of at least 4 and are alternately laminated with the electrode films. A first support member has a first projection, whereas a second support member has a second projection. The first and second support members are arranged such that the first and second projections are opposed to each other. The piezoelectric device is disposed between the first and second projections, and is held by end faces of the first and second projections.
    Type: Application
    Filed: January 21, 2003
    Publication date: May 6, 2004
    Applicant: TDK CORPORATION
    Inventor: Katsumi Yamauchi