Patents by Inventor Yuichi Takasu

Yuichi Takasu 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).

  • Gas carburizing method and apparatus
    Patent number: 4950334
    Abstract: In a gas carburizing method, a hydrocarbon gas and air are supplied to a furnace main body that carburizes a workpiece. The hydrocarbon gas and air react with one another in the furnace main body to generate an atmospheric gas having a carburizing property. The flow rate of the hydrocarbon gas to be supplied is maintained at a predetermined value. The flow rate of air to be supplied can be altered by adjusting the carbon potential of the atmospheric gas.A gas carburizing apparatus includes a furnace main body and load and unload chambers provided on two ends of the furnace main body. The load and unload chambers have combustion units. The combustion units communicate with the interiors of the load and unload chambers and burn a hydrocarbon gas. The combustion gas of the hydrocarbon gas is supplied to the load and unload chambers.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: August 21, 1990
    Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo Heat Treating Company, Ltd.
    Inventors: Nobuo Nishioka, Tadayoshi Juge, Yoshiaki Shimizu, Keishichi Namba, Hiroshi Shimura, Fumitaka Abukawa, Hitoshi Goi, Kazuyoshi Fujita, Yuichi Takasu