Patents by Inventor Takehisa Ishibashi

Takehisa Ishibashi 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).

  • Electromagnetic rotary actuator
    Patent number: 5214337
    Abstract: An electromagnetic rotary actuator includes a rotor and a stator with two bearings. The rotor, including a plurality of permanent magnets, is arranged between an annular disk of non-permanent magnetic material including a plurality of coils on cores and another annular disk of magnetic material. The rotor includes a central hub arranged between the tow bearings. The actuator includes a resilient washer positioned between one of the bearings and the central hub for eliminating a thrust clearance between the central hub and the other bearing.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: May 25, 1993
    Assignee: Atsugi Unisia Corp.
    Inventor: Takehisa Ishibashi
  • Rotary actuator
    Patent number: 5087868
    Abstract: A rotary actuator is designed for rotatingly drive a rotary body, such as a rotary valve member for adjusting damping force to be created by a variable damping force shock absorber. The rotary actuator takes a layout of a permanent magnet and an electromagnet arranged in vertically spaced relationship. Vertical layout of the permanent magnet and the electromagnet reduces plane area required for installation.
    Type: Grant
    Filed: August 7, 1990
    Date of Patent: February 11, 1992
    Assignee: Atsugi Motor Parts Company, Ltd.
    Inventors: Takehisa Ishibashi, Shinobu Kakizaki, Yoshiaki Watanabe, Fukashi Kanai
  • Variable damping force shock absorber with rotary actuator for rotary member
    Patent number: 4776437
    Abstract: A rotary actuator is designed for rotatingly driving a rotary body, such as a rotary valve member, for adjusting damping force to be created by a variable damping force shock absorber. The rotary actuator takes a layout of a permanent magnet and an electromagnet arranged in vertically spaced relationship. Vertical layout of the permanent magnet and the electromagnet reduces plane area required for installation.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: October 11, 1988
    Assignee: Atsugi Motor Parts Company, Limited
    Inventors: Takehisa Ishibashi, Shinobu Kakizaki, Yoshiaki Watanabe, Fukashi Kanai