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James W. Sigmon

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  • Charlotte, NC, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Compression-loaded plastic rotors
    • Patent number 10,287,110
    • Issue date May 14, 2019
    • James W. Sigmon
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Rotary airlock valve using a single seat
    • Patent number 5,431,311
    • Issue date Jul 11, 1995
    • James W. Sigmon
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Vaneless rotary airlock valve
    • Patent number 5,163,656
    • Issue date Nov 17, 1992
    • James W. Sigmon
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Vaneless rotary airlock valve
    • Patent number 5,029,517
    • Issue date Jul 9, 1991
    • James W. Sigmon
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Vaneless rotary airlock valve
    • Patent number 4,782,741
    • Issue date Nov 8, 1988
    • James W. Sigmon
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Expansible device
    • Patent number 4,467,701
    • Issue date Aug 28, 1984
    • Sigmon Company
    • James W. Sigmon
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Expansible device
    • Patent number 4,295,633
    • Issue date Oct 20, 1981
    • James W. Sigmon
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rotary flow regulating valve and method
    • Patent number 4,215,722
    • Issue date Aug 5, 1980
    • James W. Sigmon
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rotary motion valve and actuator
    • Patent number 3,977,648
    • Issue date Aug 31, 1976
    • Sigmon Corporation
    • James W. Sigmon
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...