Patents Assigned to Liberty Group
  • Pressure reducing valve
    Patent number: 6257275
    Abstract: A pressure regulator for breathing apparatus controlled by a diaphragm, piston or bellows having one face exposed to a reference pressure which is automatically maintained at a level substantially the same as ambient pressure by means of a metering valve communicating with pressure at the regulator outlet and operated by a flexible diaphragm exposed to ambient pressure, and a pressure relief valve to vent excess reference pressure to the outside of the regulator.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: July 10, 2001
    Assignees: Liberty Group, Scuba Technologies, Inc.
    Inventors: Thomas J. Furbish, Robert G. Ledbetter