Patents by Inventor Tatsuaki Yukimasa

Tatsuaki Yukimasa 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 material
    Patent number: 4306729
    Abstract: There is provided a sealing material comprising 100 parts by weight of a fibrous material made of polyester, polyamide or the like which constitutes a non-woven cloth; and 10 to 150 parts by weight, based on the weight after dried and hardened, of one or a mixture of a styrene-butadiene polymer base latex, an acrylonitrile-butadiene polymer base latex, an acrylic ester polymer base latex, a polysiloxane base latex and/or a fluorine-contained rubber base latex impregnated in the fibrous material.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: December 22, 1981
    Assignee: Nippon Oil Seal Industry Co., Ltd.
    Inventors: Fumio Hiramatsu, Kenichi Ohsone, Tatsuaki Yukimasa
  • Hydrodynamic seal
    Patent number: 4212476
    Abstract: Disclosed is a hydrodynamic seal comprising a sealing member of a fluorine resin including a sealing lip portion having a conical shape and a fixing portion extending from the sealing lip portion in the radial direction, a gripping support member for gripping and supporting the fixing portion of said sealing member and a coil spring member wound helically in the conical shape on the sealing lip portion of the sealing member, wherein a spiral projection is formed on the peripheral face of the sealing lip portion by the spring member.
    Type: Grant
    Filed: July 18, 1979
    Date of Patent: July 15, 1980
    Assignee: Nippon Oil Seal Industry Co., Ltd.
    Inventors: Hideo Kawabata, Tatsuaki Yukimasa