Patents by Inventor Terrence C. Allen

Terrence C. Allen 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).

  • Check valve
    Patent number: 5349984
    Abstract: A check valve having a presettable cracking pressure. The check valve employs a spring-loaded valve element in which the compression spring and valve element are held into position in the valve body by means of an apertured plug.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: September 27, 1994
    Assignee: Halkey-Roberts Corporation
    Inventors: Jacek M. Weinheimer, Michael T. Taylor, Terrence C. Allen