Patents by Inventor Minoru Matsugawa

Minoru Matsugawa 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).

  • Vacuum-pressure supply device
    Patent number: 5010844
    Abstract: There is disclosed a vacuum-pressure regulating device which is attached to a vacuum system in connection with a vacuum pump so that it serves to ensure a constant vacuum pressure in the vacuum system and then to supply vacuum pressure from the vacuum system, after reduced to the required extent, to a desired space. The vacuum-pressure supply device of the present invention is suitable for adjusting vacuum in vacuum systems for milking cows.
    Type: Grant
    Filed: March 15, 1990
    Date of Patent: April 30, 1991
    Assignee: Orion Machinery Co., Ltd.
    Inventors: Toru Takeuchi, Minoru Matsugawa