Patents by Inventor Yoshihiko Tokuda

Yoshihiko Tokuda 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: 10281271
    Abstract: The invention provides a surveying instrument, which comprises a frame unit provided capable of rotating horizontally via a horizontal rotation shaft, a telescope unit provided capable of rotating vertically via a vertical rotation shaft in a recessed portion formed in the frame unit, a vertical rotation driving unit in which a vertical output shaft is connected to the vertical rotation shaft, and a whirl-stop unit provided on an outer side of a side plate of the frame unit along the side plate and connecting the vertical rotation driving unit and the frame unit to each other.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: May 7, 2019
    Assignee: TOPCON Corporation
    Inventors: Yoshihiko Tokuda, Satoshi Nakamura, Yosuke Okudaira
  • Patent number: 9919341
    Abstract: The invention provides an ultrasonic motor, which is an ultrasonic motor provided on a shaft end of a rotation shaft. An output shaft of the ultrasonic motor is connected to the rotation shaft, a stator is rotatably provided on the output shaft, a rotor is fixed to the rotation shaft, a vibration generating component for generating an ultrasonic vibration is provided on either one of the rotor or the stator. A whirl-stop unit is provided between the stator and a fixed side for supporting the rotation shaft: the whirl-stop unit has a joint holder provided on the fixed side and a connection element provided on the stator: the joint holder has a ball holder for pressing a metal ball to the connection element in a circumferential direction and a connection pin holding the connection element between the ball holder and the connection pin, spanning over the joint holder and capable of tilting.
    Type: Grant
    Filed: January 10, 2017
    Date of Patent: March 20, 2018
    Assignee: TOPCON Corporation
    Inventors: Yoshihiko Tokuda, Satoshi Nakamura, Yosuke Okudaira
  • Publication number: 20170207384
    Abstract: The invention provides a surveying instrument, in which an output shaft of an ultrasonic motor is attachably and detachably connected by a bolt to a lower end of a horizontal shaft of a frame unit supported rotatably in a horizontal direction, a rotating plate is fixed to the output shaft, a vibration generating component is formed on an outer circumferential portion of the rotating plate, a stator in close contact with the vibration generating component via a predetermined friction torque T1 is rotatably provided on the output shaft, the stator is restricted on a rotation by a whirl-stop unit, ultrasonic vibration is generated in the vibration generating component and the output shaft is rotated.
    Type: Application
    Filed: January 10, 2017
    Publication date: July 20, 2017
    Inventors: Yoshihiko Tokuda, Satoshi Nakamura, Yosuke Okudaira
  • Publication number: 20170205229
    Abstract: The invention provides a surveying instrument, which comprises a frame unit provided capable of rotating horizontally via a horizontal rotation shaft, a telescope unit provided capable of rotating vertically via a vertical rotation shaft in a recessed portion formed in the frame unit, a vertical rotation driving unit in which a vertical output shaft is connected to the vertical rotation shaft, and a whirl-stop unit provided on an outer side of a side plate of the frame unit along the side plate and connecting the vertical rotation driving unit and the frame unit to each other.
    Type: Application
    Filed: January 10, 2017
    Publication date: July 20, 2017
    Inventors: Yoshihiko Tokuda, Satoshi Nakamura, Yosuke Okudaira
  • Publication number: 20170203332
    Abstract: The invention provides an ultrasonic motor, which is an ultrasonic motor provided on a shaft end of a rotation shaft. An output shaft of the ultrasonic motor is connected to the rotation shaft, a stator is rotatably provided on the output shaft, a rotor is fixed to the rotation shaft, a vibration generating component for generating an ultrasonic vibration is provided on either one of the rotor or the stator. A whirl-stop unit is provided between the stator and a fixed side for supporting the rotation shaft: the whirl-stop unit has a joint holder provided on the fixed side and a connection element provided on the stator: the joint holder has a ball holder for pressing a metal ball to the connection element in a circumferential direction and a connection pin holding the connection element between the bail holder and the connection pin, spanning over the joint holder and capable of tilting.
    Type: Application
    Filed: January 10, 2017
    Publication date: July 20, 2017
    Inventors: Yoshihiko Tokuda, Satoshi Nakamura, Yosuke Okudaira
  • Patent number: D532325
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: November 21, 2006
    Assignee: Sokkia Co., Ltd.
    Inventors: Yoshihiko Tokuda, Satoshi Nakamura