TREA

Wilfred H. St. Laurent Jr.

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  • Marblehead, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fluid operated pump
    • Patent number 4,705,458
    • Issue date Nov 10, 1987
    • Bellofram Corporation
    • Wilfred St. Laurent
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rolling diaphragm vacuum control with check valve
    • Patent number 4,466,455
    • Issue date Aug 21, 1984
    • Bellofram Corporation
    • Christos Athanassiu
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Rolling diaphragm vacuum control
    • Patent number 4,390,036
    • Issue date Jun 28, 1983
    • Bellofram Corporation
    • Christos Athanassiu
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pneumatic positioner
    • Patent number 4,263,838
    • Issue date Apr 28, 1981
    • Bellofram Corporation
    • Wilfred H. St. Laurent
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Improvements of sealed shafts
    • Patent number 4,253,675
    • Issue date Mar 3, 1981
    • Bellofram Corporation
    • Wilfred H. St. Laurent
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Sealed shaft of reduced diameter
    • Patent number 4,244,589
    • Issue date Jan 13, 1981
    • Bellofram Corporation
    • Wilfred H. St. Laurent
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Self-aligning shaft seal
    • Patent number 4,229,010
    • Issue date Oct 21, 1980
    • Bellofram Corporation
    • Wilfred H. St. Laurent
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pneumatic relay
    • Patent number 4,219,042
    • Issue date Aug 26, 1980
    • Bellofram Corporation
    • Wilfred H. St. Laurent
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Sealed shaft
    • Patent number 4,208,060
    • Issue date Jun 17, 1980
    • Bellofram Corporation
    • Wilfred H. St. Laurent
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...