TREA

Jerry E. Johnson

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mud pump valve
    • Patent number 5,088,521
    • Issue date Feb 18, 1992
    • Harrisburg, Inc.
    • Jerry E. Johnson
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Valve member and method of making such a member
    • Patent number 5,062,452
    • Issue date Nov 5, 1991
    • Harrisburg, Inc.
    • Jerry E. Johnson
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Seal for a pump valve
    • Patent number 4,951,707
    • Issue date Aug 28, 1990
    • National-Oilwell
    • Jerry E. Johnson
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Crossarm valve seat with pulling ledge
    • Patent number 4,928,726
    • Issue date May 29, 1990
    • TRW Inc.
    • Jerry E. Johnson
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Valve with replaceable seal element
    • Patent number 4,922,957
    • Issue date May 8, 1990
    • National-Oilwell
    • Jerry E. Johnson
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    Valve assembly with angled valve guide
    • Publication number 20060202150
    • Publication date Sep 14, 2006
    • National Oilwell, L.P.
    • Jerry E. Johnson
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...