TREA

Trent R. Stefek

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  • Wamego, KS, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Quick coupler hydraulic control system
    • Patent number 9,228,314
    • Issue date Jan 5, 2016
    • Caterpillar Inc.
    • Troy Robl
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Tool coupler system having multiple pressure sources
    • Patent number 9,217,235
    • Issue date Dec 22, 2015
    • Caterpillar Inc.
    • Troy Curtis Robl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Quick coupler
    • Patent number 8,869,437
    • Issue date Oct 28, 2014
    • Caterpillar Inc.
    • Troy C. Robl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Tool coupler having anti-release mechanism
    • Patent number 8,684,623
    • Issue date Apr 1, 2014
    • Caterpillar Inc.
    • Troy Curtis Robl
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Tool coupler assembly
    • Patent number 8,281,506
    • Issue date Oct 9, 2012
    • Caterpillar Inc.
    • Trent Randall Stefek
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Quick coupler assembly
    • Patent number 7,984,575
    • Issue date Jul 26, 2011
    • Caterpillar Inc.
    • Troy Curtis Robl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

  • Information Patent Application

    AUTOMATED WORK TOOL DEPRESSURIZATION CIRCUIT AND METHOD
    • Publication number 20240044099
    • Publication date Feb 8, 2024
    • Caterpillar Inc.
    • Mark William THOMPSON
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    UNIVERSAL HYDRAULIC AUXILIARY DEPRESSURIZATION CIRCUIT
    • Publication number 20230358012
    • Publication date Nov 9, 2023
    • Caterpillar Inc.
    • Mark W. Thompson
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    QUICK COUPLER AUTOMATIC LOCKING MECHANISM AND METHOD
    • Publication number 20230160172
    • Publication date May 25, 2023
    • Caterpillar Inc.
    • Mark W. Thompson
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    STICK AND COUPLER ASSEMBLY
    • Publication number 20170121928
    • Publication date May 4, 2017
    • Caterpillar Inc.
    • Troy C. Robl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Quick Coupler Hydraulic Control System
    • Publication number 20140331663
    • Publication date Nov 13, 2014
    • Caterpillar Inc.
    • Troy Robl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    LOCKING SYSTEM FOR QUICK COUPLER
    • Publication number 20140294497
    • Publication date Oct 2, 2014
    • Caterpillar Inc.
    • Troy C. Robl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    TOOL COUPLER HAVING A MODULAR FRAME CONSTRUCTION
    • Publication number 20140212210
    • Publication date Jul 31, 2014
    • Caterpillar Inc.
    • Troy Curtis Robl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    QUICK COUPLER
    • Publication number 20130322954
    • Publication date Dec 5, 2013
    • Caterpillar Inc.
    • Troy C. Robl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    TOOL COUPLER HAVING ANTI-RELEASE MECHANISM
    • Publication number 20130322959
    • Publication date Dec 5, 2013
    • Troy Curtis ROBL
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Application

    TOOL COUPLER SYSTEM HAVING MULTIPLE PRESSURE SOURCES
    • Publication number 20130318841
    • Publication date Dec 5, 2013
    • Troy Curtis ROBL
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    TOOL COUPLER ASSEMBLY
    • Publication number 20130008153
    • Publication date Jan 10, 2013
    • Caterpillar Inc.
    • Trent Randall Stefek
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    TOOL COUPLER ASSEMBLY
    • Publication number 20110209608
    • Publication date Sep 1, 2011
    • Trent Randall Stefek
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    QUICK COUPLER ASSEMBLY
    • Publication number 20090007465
    • Publication date Jan 8, 2009
    • Caterpillar Inc.
    • TROY CURTIS ROBL
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING