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

1994-12-21

2000-10-24

Nguyen, Hoang

Power plants

Pressure fluid source and motor

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

60424, 60426, 91516, 91518, F16D 3102

Patent

active

061348872

ABSTRACT:
A hydraulic control circuit for, for example, working members of earth-moving machines such as backhoe loaders. A first and a second control section (9,10) are coupled to first and second linear hydraulic actuators (1,2; 3-8) through respective first a second hydraulic spool valves (21,22; 23-28), and supply (11) of a hydraulic fluid under pressure is connected in parallel with the two control sections (9,10) via a feed line (13). A load sensing circuit (16) is associated with the first and second spool valves. The control circuit includes a series-parallel connection circuit (36) of the load sensing circuit (16), and additional optional devices ensuring a higher operative functionality of the working members of the machine.

REFERENCES:
patent: 4343151 (1982-08-01), Lorimor
patent: 4463557 (1984-08-01), Miller

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