Patents by Inventor Yasuhiro Tomago

Yasuhiro Tomago 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).

  • Electric power steering apparatus
    Patent number: 6776253
    Abstract: Disclosed is an electric power steering apparatus in which an electric motor for producing a steering assist force is provided in a steering column. Vibration from the electric motor is transmitted to a member such as a knee protector, for example, supported on the steering column through a bracket. A dynamic damper for restraining resonance of the member to which the vibration is transmitted is provided in the bracket.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: August 17, 2004
    Assignee: Koyo Seiko Co., Ltd.
    Inventors: Yasuhiro Tomago, Shuzo Hirakushi
  • Electric power steering apparatus
    Publication number: 20020166715
    Abstract: Disclosed is an electric power steering apparatus in which an electric motor for producing a steering assist force is provided in a steering column. Vibration from the electric motor is transmitted to a member such as a knee protector, for example, supported on the steering column through a bracket. A dynamic damper for restraining resonance of the member to which the vibration is transmitted is provided in the bracket.
    Type: Application
    Filed: April 19, 2002
    Publication date: November 14, 2002
    Inventors: Yasuhiro Tomago, Shuzo Hirakushi
  • Variable throttle valve with eccentric members, for use in hydraulic steering device
    Patent number: 5791433
    Abstract: A screw member is screwed into a spool which is axially movably inserted into a housing. The opening of the throttling portion of a variable throttle valve is varied according to the axial shifting of the spool according to the rotation of the screw member. The centerline of the screw member is eccentric to the centerline of the spool. The eccentricity prevents the spool from rotating together with the screw member.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: August 11, 1998
    Assignee: Koyo Seiko Co., Ltd.
    Inventors: Tetsuya Murakami, Yasuhiro Tomago, Hiroto Sasaki, Masanobu Inoue