Patents by Inventor Yoshikazu Takamizawa

Yoshikazu Takamizawa 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).

  • Cartridge-type valve
    Patent number: 4460012
    Abstract: A valve for controlling the flow of fluids, improved by utilizing a cartridge, containing a valve head and a valve seat, which is placed in a box-type valve body. The cartridge enables rapid exchange of the valve head and valve seat.Thus, the improved valve is particularly suitable for use in pipe lines of nuclear power plants, in which radioactive substances flow.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: July 17, 1984
    Assignees: JGC Corporation, OKA Valve Mfg. Co., Ltd.
    Inventors: Noboru Koumi, Takeshi Nishitani, Kazuo Okayasu, Yoshikazu Takamizawa