Patents by Inventor Taehiro Matsumoto

Taehiro Matsumoto 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).

  • Dynamic pressure type fluid bearing device
    Patent number: 5906440
    Abstract: A dynamic pressure type fluid bearing device includes a rotary shaft, a hollow sleeve in which the rotary shaft is rotatably mounted, and at least two sets of dynamic pressure generating grooves formed in either an outer surface of the rotary shaft or an inner surface of the sleeve. In this construction, a value obtained from k.times.sin .beta. is made equal to about 0.1 or ranges from 0.09 to 0.12, where k=d/e, d is a width of the dynamic pressure generating grooves, e is an interval between neighboring dynamic pressure generating grooves, and .beta. is an angle of the dynamic pressure generating grooves relative to a direction of rotation of the rotary shaft.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: May 25, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takao Yoshitsugu, Koichiro Ohata, Taehiro Matsumoto
  • Scanner motor
    Patent number: D413112
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: August 24, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koichiro Ohata, Taehiro Matsumoto