Patents by Inventor Nobutaka Tsutsumi

Nobutaka Tsutsumi 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).

  • Low-pressure casting apparatus and low-pressure casting method using the same
    Patent number: 9676025
    Abstract: Provided is a low-pressure casting apparatus for stable casting without using feedback control even if a furnace body has a crack, and a low-pressure casting method using the same. A low-pressure casting apparatus fills a cavity with molten metal M through a guiding unit by introducing gas into a holding furnace for heating the molten metal M to apply pressure to a surface of the molten metal M. The holding furnace includes a casing, a furnace body accommodated in the casing, and a refractory layer disposed between the casing and the furnace body, the refractory layer having a pore structure. The low-pressure casting apparatus further includes a first gas supply unit for supplying to the furnace body the gas to apply pressure to the molten metal M and a second gas supply unit for supplying gas to the refractory layer.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: June 13, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Nobutaka Tsutsumi, Tatsuya Miyazawa, Hiroshi Takahashi, Shinsuke Fujiyama
  • LOW-PRESSURE CASTING APPARATUS AND LOW-PRESSURE CASTING METHOD USING THE SAME
    Publication number: 20160221075
    Abstract: Provided is a low-pressure casting apparatus for stable casting without using feedback control even if a furnace body has a crack, and a low-pressure casting method using the same. A low-pressure casting apparatus fills a cavity with molten metal M through a guiding unit by introducing gas into a holding furnace for heating the molten metal M to apply pressure to a surface of the molten metal M. The holding furnace includes a casing, a furnace body accommodated in the casing, and a refractory layer disposed between the casing and the furnace body, the refractory layer having a pore structure. The low-pressure casting apparatus further includes a first gas supply unit for supplying to the furnace body the gas to apply pressure to the molten metal M and a second gas supply unit for supplying gas to the refractory layer.
    Type: Application
    Filed: January 28, 2016
    Publication date: August 4, 2016
    Inventors: Nobutaka Tsutsumi, Tatsuya Miyazawa, Hiroshi Takahashi, Shinsuke Fujiyama