Patents by Inventor Katuhyosi Takase

Katuhyosi 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).

  • Method of preparing a leaf spring
    Patent number: 5100482
    Abstract: A method of preparing a leaf spring having a heating step in which a raw material of a leaf spring is heated to austenite range temperature, a rolling step in which the above heated material is formed to a desirable shape, a working step in which the above rolling material is cut to a fixed length to form a chip hole, a bolt hole or the like, and a cooling step in which a camber is given to the above working material to cool to hardening in his state.Other five modified methods are also described.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: March 31, 1992
    Assignee: Horikiri Spring Mfg., Co., Ltd.
    Inventors: Tadanori Tanaka, Masao Nakamura, Toshifumi Yamada, Katuhyosi Takase, Kazuhiro Muramatsu, Tosikazu Ebata