TREA

Walter W. Powell

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Non-flowing pilot valve
    • Patent number 6,386,227
    • Issue date May 14, 2002
    • Flow Safe, Inc.
    • Walter W. Powell
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Main relief valve for safety relief system
    • Patent number 5,890,508
    • Issue date Apr 6, 1999
    • Flow Safe, Inc.
    • Walter W. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pilot operated safety relief valve
    • Patent number 5,842,501
    • Issue date Dec 1, 1998
    • Flow Safe, Inc.
    • Walter W. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pressure relief valves adapted for low pressure operation
    • Patent number 5,555,910
    • Issue date Sep 17, 1996
    • Groth Corporation
    • Walter W. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Sealing means for pressure relief valves and methods of assembly
    • Patent number 5,499,648
    • Issue date Mar 19, 1996
    • Groth Corporation
    • Walter W. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Direct spring pressure operated valve
    • Patent number 5,341,838
    • Issue date Aug 30, 1994
    • Walter W. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Shuttle valve
    • Patent number 5,329,968
    • Issue date Jul 19, 1994
    • KWW Gesellschaft fur Verfahrenstechnik mbH
    • Walter W. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Diaphragm operated spring loaded regulator
    • Patent number 5,238,021
    • Issue date Aug 24, 1993
    • Groth Corporation
    • Walter W. Powell
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Low-pressure pilot valve
    • Patent number 5,163,471
    • Issue date Nov 17, 1992
    • Walter W. Powell
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    Shuttle valve
    • Patent number 4,964,435
    • Issue date Oct 23, 1990
    • Disco
    • Walter Powell
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    High temperature safety relief system
    • Patent number 4,870,989
    • Issue date Oct 3, 1989
    • Keystone International, Inc.
    • Cleo M. Bickford
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    High temperature safety relief system
    • Patent number 4,865,074
    • Issue date Sep 12, 1989
    • Keystone International Inc.
    • Cleo M. Bickford
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    High temperature safety relief system
    • Patent number 4,848,397
    • Issue date Jul 18, 1989
    • Keystone International, Inc.
    • Cleo M. Bickford
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Safety relief system for control or vent valves
    • Patent number 4,705,065
    • Issue date Nov 10, 1987
    • Anderson, Greenwood & Company
    • Michael D. McNeely
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Redundant pilot valve control system
    • Patent number 4,672,995
    • Issue date Jun 16, 1987
    • Anderson-Greenwood USA, Inc.
    • Walter W. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pilot for safety valve
    • Patent number 4,445,531
    • Issue date May 1, 1984
    • Anderson, Greenwood & Co.
    • Walter W. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Low pressure safety relief valve
    • Patent number 4,425,938
    • Issue date Jan 17, 1984
    • Donald M. Papa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pressure relief device
    • Patent number 4,388,940
    • Issue date Jun 21, 1983
    • Anderson, Greenwood & Co.
    • Walter W. Powell
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...