TREA

Willard J. Haak

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  • Peoria, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    High pressure hydraulic system
    • Patent number 4,250,794
    • Issue date Feb 17, 1981
    • Caterpillar Tractor Co.
    • Willard J. Haak
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Overrunning load control for hydraulic motors
    • Patent number 4,206,688
    • Issue date Jun 10, 1980
    • Caterpillar Tractor Co.
    • Willard J. Haak
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Attitude control for implement
    • Patent number 4,126,083
    • Issue date Nov 21, 1978
    • Caterpillar Tractor Co.
    • Willard J. Haak
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Front wheel drive system for a vehicle
    • Patent number 4,102,425
    • Issue date Jul 25, 1978
    • Caterpillar Tractor Co.
    • Howard A. Marsden
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Final sprocket drive for track-type vehicles
    • Patent number 4,029,166
    • Issue date Jun 14, 1977
    • Caterpillar Tractor Co.
    • Willard J. Haak
    • B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • Information Patent Grant

    Epicyclic final drive for track-type vehicles
    • Patent number 3,990,528
    • Issue date Nov 9, 1976
    • Caterpillar Tractor Co.
    • Willard J. Haak
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Overruning load control for hydraulic jacks
    • Patent number 3,972,267
    • Issue date Aug 3, 1976
    • Caterpillar Tractor Co.
    • Willard J. Haak
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL