Geographic surface altering implement control system

Earth working – Automatic power control – Land leveller type

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Details

172812, 91520, 36442407, E02F 376, E02F 385

Patent

active

054996848

ABSTRACT:
A tilt angle control system has first and second sensors for sensing the position of the rod end portion of first and second lift jacks. A controller calculates an actual tilt angle of an implement connected to the rod end portions of the lift jacks based on a difference in the amount of extension relative to a baseline. A display device displays the actual and desired tilt angles. The controller compares the actual tilt angle to a desired tilt angle and actuates a fluid operated system to move one of the first and second jacks in response to a difference between the desired and actual tilt angles. An inclinometer sensed angle of the machine relative to a horizontal plane is added to the actual tilt angle to correct the actual tilt angle of the implement. The tilt angle control system is particularly suited for use on a bulldozer.

REFERENCES:
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patent: 4166506 (1979-09-01), Tezuka et al.
patent: 4282933 (1981-08-01), Suganami et al.
patent: 4516469 (1985-05-01), Sato et al.
patent: 4630685 (1986-12-01), Huck, Jr. et al.
patent: 4802537 (1989-02-01), Ryerson
patent: 4934463 (1990-06-01), Ishida et al.

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