Patents by Inventor Arthur Edward Hirsch

Arthur Edward Hirsch 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).

  • Two-way fluid pressure relief valve
    Patent number: 4033375
    Abstract: A two-way fluid pressure relief valve having a valve body and two valve seats therein and two valve closure pieces operable on the seats. Springs force the closure pieces against the seats, and the fluid pressure will act in both directions for removing the closures from the seats and causing fluid pressure relief. A movable member engages the closure pieces to remove them from the seats and to also fluid-tightly seal with them up to the point of fluid pressure relief created by the springs.
    Type: Grant
    Filed: May 7, 1976
    Date of Patent: July 5, 1977
    Assignee: J. I. Case Company
    Inventor: Arthur Edward Hirsch