Patents by Inventor Robert E. Farell

Robert E. Farell 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).

  • Hand operated hydraulic pump having pressurized reservoir within piston
    Patent number: 5251445
    Abstract: An airless hand held hydraulic pump unaffected by gravity continuously maintains pressure on the fluid in a dynamic reservoir chamber to enable pumping into a dynamic pressure chamber for actuating a forcing rod irrespective of the orientation of the pump. A release valve permits fluid return from the pressure chamber into the reservoir chamber. The pump can be fitted with a tool such as a door forcer.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: October 12, 1993
    Assignee: Hydra-Ram Inc.
    Inventors: Robert E. Farell, Ronald Johnson