Patents by Inventor Tadaaki Takase

Tadaaki Takase 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).

  • Metallic sheath for posttensioning method
    Patent number: 4577443
    Abstract: In a prestressed concrete structure executed by posttensioning method, a metallic sheath having an inner peripheral surface thereof in sliding contact with a tendon coated with a solid lubricating coating including polytetrafluoroethylene (PTFE).By the use of this metallic sheath, the sliding frictional resistance produced between the metallic sheath and tendon when the tendon is subjected to tensioning operation is considerably decreased to increase the prestressing force introduced into the structure accordingly.The solid lubricating coating is excellent in flexibility and contact properties, and good characteristics of coating are imparted to the sheath.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: March 25, 1986
    Assignee: Oiles Industry Co., Ltd.
    Inventors: Toshiyuki Kitta, Wataru Abe, Tadaaki Takase
  • Sintered self-lubricating article
    Patent number: 4000981
    Abstract: A sintered self-lubricating article having great oxidation resistance, high dimension-stability and high wear resistance at elevated temperatures without assistance of any other lubricants and consisting essentially of 5 to 10% by weight of tin, 8 to 40% by weight of zinc, 5 to 15% by weight of graphite and the balance being copper.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: January 4, 1977
    Assignee: Oiles Industry Co., Ltd.
    Inventors: Akira Sugafuji, Hiroshi Kurimoto, Tadaaki Takase