Patents Assigned to Hydra-Ram Inc.
  • 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