Siegfried Hertell

Person

  • Radevormwald, DE

Patents Grantslast 30 patents

  • Information Patent Grant

    Hydraulic gear pump

    • Patent number 4,850,814
    • Issue date Jul 25, 1989
    • Barmag AG
    • Siegfried Hertell
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Internal gear pump

    • Patent number 4,813,853
    • Issue date Mar 21, 1989
    • Barmag AG
    • Dieter Otto
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Gear pump having multiple outputs

    • Patent number 4,780,070
    • Issue date Oct 25, 1988
    • Barmag AG
    • Siegfried Hertell
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Rotary vane pump having a plurality of inlet and outlet slots in a...

    • Patent number 4,772,185
    • Issue date Sep 20, 1988
    • Barmag AG
    • Siegfried Hertell
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Gear pump with leakage fluid intermittently communicated to expandi...

    • Patent number 4,770,617
    • Issue date Sep 13, 1988
    • Barmag AG
    • Siegfried Hertell
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Regulating pump

    • Patent number 4,750,867
    • Issue date Jun 14, 1988
    • Siegfried Hertell
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Drive shaft seal for gear pump and method

    • Patent number 4,737,087
    • Issue date Apr 12, 1988
    • Barmag AG
    • Siegfried Hertell
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Gear pump having multiple outputs

    • Patent number 4,674,964
    • Issue date Jun 23, 1987
    • Barmag AG
    • Siegfried Hertell
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Control apparatus for a positive displacement reciprocating pump

    • Patent number 4,648,810
    • Issue date Mar 10, 1987
    • Barmag Barmer Maschinenfabrik AG
    • Heinz Schippers
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Rotary vane pump

    • Patent number 4,604,041
    • Issue date Aug 5, 1986
    • Barmag Barmer Maschinenfabrik Aktiengesellschaft
    • Siegfried Hertell
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Control apparatus for a positive displacement reciprocating pump

    • Patent number 4,523,901
    • Issue date Jun 18, 1985
    • Barmag Barmer Maschinenfabrick AG
    • Heinz Schippers
    • F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
  • Information Patent Grant

    Seal for high pressure pump or the like

    • Patent number 4,515,512
    • Issue date May 7, 1985
    • Barmag Barmer Maschinenfabrik AG
    • Siegfried Hertell
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Oil lubrication of vacuum pump with pulsating oil feed

    • Patent number 4,478,562
    • Issue date Oct 23, 1984
    • Barmag Barmer Maschinenfabrik AG
    • Heinz Schippers
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Motor fuel feed pump

    • Patent number 4,462,302
    • Issue date Jul 31, 1984
    • Barmag Barmer Maschinenfabrik AG
    • Siegfried Hertell
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Rotary vane pump

    • Patent number 4,459,091
    • Issue date Jul 10, 1984
    • Barmag Barmer Maschinenfabrik AG
    • Siegfried Hertell
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Hydraulic control apparatus for load independent flow regulation

    • Patent number 4,355,655
    • Issue date Oct 26, 1982
    • Barmag Barmer Maschinenfabrik
    • Siegfried Hertell
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic control apparatus for load independent flow regulation

    • Patent number 4,303,091
    • Issue date Dec 1, 1981
    • Barmag Barmer Maschinenfabrik
    • Siegfried Hertell
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Rotary vane pump assembly

    • Patent number 4,255,098
    • Issue date Mar 10, 1981
    • Barmag Barmer Machinenfabrik Aktiengesellschaft
    • Siegfried Hertell
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Rotary vane pump

    • Patent number 4,231,728
    • Issue date Nov 4, 1980
    • Barmag Barmer Maschinenfabrik Aktiengesellschaft
    • Siegfried Hertell
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary vane vacuum pump with filter means for inlet

    • Patent number 4,164,384
    • Issue date Aug 14, 1979
    • Barmag Barmer Maschinenfabrik AG
    • Siegfried Hertell
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...