Hydraulic control system for hydraulically operated road grader

Details Hydraulic control system for hydraulically operated road grader Hydraulic control system for hydraulically operated road grader

1975-03-13

1976-06-08

Pinkham, Richard C.

Earth working

Automatic power control

Land leveller type

91171, 91411R, 172797, E02F 376

Patent

active

039616703

ABSTRACT:
A hydraulic control system for use for precise control of the height of the earth working blade on road graders, and in particular for use in combination with road graders that are automatically controlled. The control system is selectively operable, and when engaged will permit only simultaneous movement of the two cylinders used for controlling the depth of the earth working blade.

REFERENCES:
patent: 2636290 (1953-04-01), Bell
patent: 2698491 (1955-01-01), Felt
patent: 2870553 (1959-01-01), Temple
patent: 2969647 (1961-01-01), Raymond
patent: 3495663 (1970-02-01), Scholl et al.
patent: 3543644 (1970-12-01), Stacey
patent: 3648565 (1972-03-01), Probst et al.
patent: 3782478 (1974-01-01), McRay
patent: 3823646 (1974-07-01), Wadsworth

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