Patents Examined by Look Edward K.
  • Apparatus for providing relief to a working chamber
    Patent number: 5081902
    Abstract: For the relief of a highly pressurized hydraulic liquid in a working chamber of pilot controlled 2/2 poppet valve is used. The working chamber is further connected to a pressure relief valve, the output of which is connected to a control conduit extending between a control chamber of the 2/2 poppet valve and the pilot valve. The apparatus of the invention requires a shorter period of time for the pressure relief without the danger of relief noise.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: January 21, 1992
    Assignee: Mannesmann Rexroth GmbH
    Inventor: Georg Rausch