Patents by Inventor Akihico Tsuda

Akihico Tsuda 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 venting device for molding operations
    Patent number: 4997026
    Abstract: A gas venting device for molding operations is disclosed having a valve for closing off a gas evacuation system from a mold when the mold cavity is filled with melt. A positive drive mechanism is provided for closing the valve, and a mechanism is provided for allowing the valve body to close more rapidly by action of the melt itself against the valve body in the event the melt advances more rapidly.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: March 5, 1991
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Mamoru Ozeki, Akihico Tsuda
  • Gas venting device for molding operations
    Patent number: 4987947
    Abstract: A gas venting device for molding operations is disclosed having a valve for closing off a gas evacuation system from a mold when the mold cavity is filled with melt. A positive drive mechanism is provided for closing the valve, and a mechanism is provided for allowing the valve body to close more rapidly by action of the melt itself against the valve body in the event the melt advances more rapidly.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: January 29, 1991
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Mamoru Ozeki, Akihico Tsuda
  • Gas venting device for molding operations
    Patent number: 4787436
    Abstract: A gas venting device for molding operations is disclosed having a valve for closing off a gas evacuation system from a mold when the mold cavity is filled with melt. A positive drive mechanism is provided for closing the valve, and a mechanism is provided for allowing the valve body to close more rapidly by action of the melt itself against the valve body in the event the melt advances more rapidly through the gas vent passages than expected.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: November 29, 1988
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Mamoru Ozeki, Akihico Tsuda