Patents by Inventor Darrell D. Gritz

Darrell D. Gritz 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).

  • Pump systems for liquids
    Patent number: 3931830
    Abstract: A system for pumping of liquid under pressure, in which a pressure switch is adapted to control the starting and stopping of the pump within a safe pressure range, and in the event of malfunction of the pressure switch, the service line and associated plumbing is isolated from the pump to protect against development of pressures in the serviceline which might damage the plumbing.
    Type: Grant
    Filed: March 20, 1974
    Date of Patent: January 13, 1976
    Assignee: Jacuzzi Bros. Incorporated
    Inventor: Darrell D. Gritz