Patents by Inventor Atsushi Yoshitake

Atsushi Yoshitake 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).

  • Power steering apparatus
    Patent number: 8443929
    Abstract: A power steering apparatus includes a worm wheel mounted on the steering shaft, a worm shaft engaged with the worm wheel, a gear housing having a wheel accommodating portion to accommodate the worm wheel and a shaft accommodating portion to accommodate the worm shaft, a bearing mounted on the worm shaft to rotatably support the worm shaft, a holder disposed in the shaft accommodating portion and having a bearing retaining portion to retain the bearing and a resilient element disposed in the shaft accommodating portion and having a resilient body portion formed with a curvature. The resilient body portion is so structured as to become deformed in such a manner as to increase or decrease in diameter when the bearing shifts in a direction that moves the worm shaft away from the worm wheel and bias the bearing in a direction that urges the worm wheel toward the worm wheel.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: May 21, 2013
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Tatsuro Suzuki, Kohtaro Shiino, Yusuke Fukuda, Atsushi Yoshitake
  • POWER STEERING APPARATUS
    Publication number: 20100243367
    Abstract: A power steering apparatus includes a worm wheel mounted on the steering shaft, a worm shaft engaged with the worm wheel, a gear housing having a wheel accommodating portion to accommodate the worm wheel and a shaft accommodating portion to accommodate the worm shaft, a bearing mounted on the worm shaft to rotatably support the worm shaft, a holder disposed in the shaft accommodating portion and having a bearing retaining portion to retain the bearing and a resilient element disposed in the shaft accommodating portion and having a resilient body portion formed with a curvature. The resilient body portion is so structured as to become deformed in such a manner as to increase or decrease in diameter when the bearing shifts in a direction that moves the worm shaft away from the worm wheel and bias the bearing in a direction that urges the worm wheel toward the worm wheel.
    Type: Application
    Filed: March 23, 2010
    Publication date: September 30, 2010
    Inventors: Tatsuro SUZUKI, Kohtaro Shiino, Yusuke Fukuda, Atsushi Yoshitake