Patents by Inventor Michinori Yomogita

Michinori Yomogita 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).

  • Sealing apparatus
    Patent number: 5899461
    Abstract: A sealing device comprising a housing 3 provided with an annular piston insert hole 5, an annular piston member 6 slidably inserted into the piston insert hole 5 of the housing 3, and seal lips 7, 8 provided in inner and outer peripheries of the piston member 6 and placed in slidably sealing contact with inner and outer peripheral surfaces of said piston insert hole 5, in which rugged portions 9, 91 are provided on the sliding surfaces of the seal lips 7, 8.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: May 4, 1999
    Assignee: NOK Corporation
    Inventor: Michinori Yomogita