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Gregory Coolidge

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  • Elyria, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Directional control valve
    • Patent number 10,590,962
    • Issue date Mar 17, 2020
    • Parker-Hannifin Corporation
    • Gregory Thomas Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic control valve with controlled flow and valve safety disable
    • Patent number 10,281,934
    • Issue date May 7, 2019
    • Parker-Hannifin Corporation
    • Gregory Thomas Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Directional control valve
    • Patent number 10,156,246
    • Issue date Dec 18, 2018
    • Parker-Hannifin Corporation
    • Gregory T. Coolidge
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Pressure limited flow priority boost
    • Patent number 9,810,334
    • Issue date Nov 7, 2017
    • Parker-Hannifin Corporation
    • Gregory T. Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Pressure limited flow spool
    • Patent number 9,689,500
    • Issue date Jun 27, 2017
    • Parker-Hannifin Corporation
    • Gregory T. Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic sectional control valve with multiple relief slots
    • Patent number 9,683,586
    • Issue date Jun 20, 2017
    • Parker-Hannifin Corporation
    • Gregory Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Pressure compensated hydraulic system having differential pressure...
    • Patent number 9,429,175
    • Issue date Aug 30, 2016
    • Parker-Hannifin Corporation
    • Gregory T. Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic valve with pressure limiter
    • Patent number 9,027,589
    • Issue date May 12, 2015
    • Parker-Hannifin Corporation
    • Gregory Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Control valve with load sense signal conditioning
    • Patent number 7,921,878
    • Issue date Apr 12, 2011
    • Parker-Hannifin Corporation
    • Gregory T. Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    Valve with an Adjustable Flow Sharing Pressure Compensator
    • Publication number 20240102495
    • Publication date Mar 28, 2024
    • Parker-Hannifin Corporation
    • Gregory Thomas Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    Hydraulic Control Valve with Controlled Flow and Valve Safety Disable
    • Publication number 20170364102
    • Publication date Dec 21, 2017
    • Parker-Hannifin Corporation
    • Gregory Thomas Coolidge
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Directional Control Valve
    • Publication number 20170328380
    • Publication date Nov 16, 2017
    • Parker-Hannifin Corporation
    • Gregory Thomas Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    DIRECTIONAL CONTROL VALVE
    • Publication number 20170306989
    • Publication date Oct 26, 2017
    • Parker-Hannifin Corporation
    • Gregory T. Coolidge
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    HYDRAULIC SECTIONAL CONTROL VALVE WITH MULTIPLE RELIEF SLOTS
    • Publication number 20170023026
    • Publication date Jan 26, 2017
    • Gregory Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    PRESSURE LIMITED FLOW SPOOL
    • Publication number 20150362084
    • Publication date Dec 17, 2015
    • Parker-Hannifin Corporation
    • Gregory T. COOLIDGE
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    PRESSURE LIMITED FLOW PRIORITY BOOST
    • Publication number 20150362087
    • Publication date Dec 17, 2015
    • Parker-Hannifin Corporation
    • Gregory T. Coolidge
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Pressure Compensated Hydraulic System Having Differential Pressure...
    • Publication number 20130146162
    • Publication date Jun 13, 2013
    • Parker-Hannifin Corporation
    • Gregory T. Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    HYDRAULIC VALVE WITH PRESSURE LIMITER
    • Publication number 20130061955
    • Publication date Mar 14, 2013
    • Gregory Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    CONTROL VALVE WITH LOAD SENSE SIGNAL CONDITIONING
    • Publication number 20080000535
    • Publication date Jan 3, 2008
    • Gregory T. Coolidge
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL