Combined automatic and manual hydraulic control for motor grader

Details Combined automatic and manual hydraulic control for motor grader Combined automatic and manual hydraulic control for motor grader

1976-03-17

1977-04-26

Cohen, Irwin C.

Earth working

Automatic power control

Land leveller type

91 20, 91445, E02F 376, F01B 2502, F01B 2504

Patent

active

040195856

ABSTRACT:
There is disclosed a hydraulic control system including body automatic and manual control for controlling the position of a grader blade for a motor grader. The hydraulic system is supplied fluid from a single pump and is provided with means to isolate the fluid supply from the automatic portion of the system when the manual portion of the system is activated.

REFERENCES:
patent: 2940428 (1960-06-01), Brandstadter
patent: 2944524 (1960-07-01), Brandstadter et al.
patent: 3229391 (1966-01-01), Breitbarth et al.
patent: 3411411 (1968-11-01), Fleck et al.
patent: 3747351 (1973-07-01), Wilkerson et al.
patent: 3813990 (1974-06-01), Coppola et al.

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