Hydraulic control circuit for working members of earth-moving ma

Details Hydraulic control circuit for working members of earth-moving ma Hydraulic control circuit for working members of earth-moving ma

1987-02-02

1988-04-19

Michalsky, Gerald A.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

60452, 60460, 91518, 91529, F15B 1308

Patent

active

047381035

ABSTRACT:
Hydraulic control circuit for working members of earth-moving machines including linear and rotary hydraulic actuators associated with respective hydraulic distributors for the operation of respective working members. The rotary hydraulic actuators with their distributors are grouped in a circuit separate from the linear hydraulic actuators and are provided with braking valve means constituted by a single counterbalance valve connected in a common discharge line, the opening of which is controlled by a pilot pressure signal corresponding to the lowest supply pressure for the rotary actuators.

REFERENCES:
patent: 3720059 (1973-03-01), Schurawski et al.
patent: 3817153 (1974-06-01), Zunzer

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