Patents by Inventor Shigeru Ootsuka

Shigeru Ootsuka 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).

  • Axial-flow fan motor
    Patent number: 5264748
    Abstract: A sleeve-type plain bearing of an axial-flow fan motor, made of sintered oilless metal, for bearing a rotation of a rotor has plural protrusions on a thrust bearing surface in a direction vertical to an axial direction of the rotor, and thereby lubricant impregnated in the sintered oilless metal is always supplied in spaces formed by the thrust bearing surface, the protrusions and a thrust plate provided on the rotation shaft.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: November 23, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shigeru Ootsuka, Naoki Nakada, Ryoji Saneshige
  • Axial-flow fan motor with modular connector
    Patent number: 5189327
    Abstract: A brushless dc axial-flow fan motor contained in a housing, composed of an outer frame forming its periphery, a center hub and several spokes radially extending from the center hub to the outer frame. One of the spokes is capable of accommodating at least a plug or receptacle for connecting the fan motor to a power source, and is actually holding either one of the connector halves.
    Type: Grant
    Filed: August 28, 1991
    Date of Patent: February 23, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shigeru Ootsuka, Naoki Nakada, Takehito Tsukada
  • Bearing apparatus
    Patent number: 5145266
    Abstract: In a bearing apparatus having an oilless bearing, plural grooves are formed on an outer surface of the bearing or an inner surface of a bearing holder for holding lubricant oil which is overflowed from the bearing, thereby the lubricant is maintained in a long service.
    Type: Grant
    Filed: July 16, 1991
    Date of Patent: September 8, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Ryoji Saneshige, Shigeru Ootsuka