Patents by Inventor Katuro Takasawa

Katuro Takasawa 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).

  • Friction brakes
    Patent number: 4760900
    Abstract: A composite metal material for a friction brake composed of a sliding friction surface metal layer of grey cast iron and a layer of a high strength different metal having a crack transmission resistance. The grey cast iron and high strength different metal are metallurgically bonded together. In this composition metal material, cracks formed in the sliding friction surface metal layer are prevented from spreading by the high strength different metal having a high crack transmission resistance. An intermediate metal layer may be provided if desired.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: August 2, 1988
    Assignees: The Japan Steel Works, Ltd., Japanese National Railways
    Inventors: Takashi Shima, Katuro Takasawa, Tomoharu Ashikawa, Taro Tsujimura, Yasuo Takenaka, Shunichi Tomizuka