Patents by Inventor Seiichi Tachikawa

Seiichi Tachikawa 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).

  • Coupling structure of steering torque transmitting member for steering shaft
    Patent number: 7393282
    Abstract: A coupling structure for coupling a pair of steering torque transmitting members interposed in a steering shaft is arranged such that a steering torque is transmitted from one of the steering torque transmitting members to the other through a pin. One of the steering torque transmitting members has a pin insertion hole formed with a large diameter hole portion, a stepped receiving portion and a small diameter hole portion, while the pin has a large diameter portion, a stepped portion and a small diameter portion which are respectively engaged with the large diameter hole portion, the stepped receiving portion and the small diameter hole portion of the pin insertion hole.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: July 1, 2008
    Assignee: NSK Ltd.
    Inventors: Kazunori Takahashi, Seiichi Tachikawa
  • Connection structure of steering torque transmitting member for steering shaft
    Publication number: 20050239559
    Abstract: A coupling structure for coupling a pair of steering torque transmitting members interposed in a steering shaft is arranged such that a steering torque is transmitted from one of the steering torque transmitting members to the other through a pin. One of the steering torque transmitting members has a pin insertion hole formed with a large diameter hole portion, a stepped receiving portion and a small diameter hole portion, while the pin has a large diameter portion, a stepped portion and a small diameter portion which are respectively engaged with the large diameter hole portion, the stepped receiving portion and the small diameter hole portion of the pin insertion hole.
    Type: Application
    Filed: August 28, 2003
    Publication date: October 27, 2005
    Inventors: Kazunori Takahashi, Seiichi Tachikawa
  • Coupling structure of extensible shafts
    Patent number: 6722810
    Abstract: An outer shaft is spline-fitted to an inner shaft and, after thus assembling the shafts, an adjustment screw is moved inwards in the radial direction while being fastened. An interval in the radial direction between a screw member and a receiving member of a diameter-expanding member is thereby expanded, thereby thrusting the inner shaft outward in the radial direction against the outer shaft. A thrusting force acting in the radial direction on the inner shaft against the outer shaft can be adjusted by controlling a fastening force of the adjustment screw. It is therefore possible to easily adjust a slide resistance between the two shafts and surely prevent a “backlash” between the two shafts.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: April 20, 2004
    Assignee: NSK Ltd.
    Inventor: Seiichi Tachikawa