Control of the actuation of hydraulic consumers

Details Control of the actuation of hydraulic consumers Control of the actuation of hydraulic consumers

1986-06-25

1987-10-27

Weakley, Harold W.

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

With means to control the working fluid to one working...

91529, 91530, 91471, 13762527, F15B 1100

Patent

active

047021489

ABSTRACT:
The invention relates to a method for the simultaneous actuation of a plurality of hydraulic consumers by means of intrinsically-safe electro-hydraulic valves. The consumers are connected by hydraulic directional control valves to a pressure line and/or a return line. These hydraulic directional control valves can be connected in a predetermined manner, via pre-control valves to a control line. The pre-control valves are pressureless, and possess electro-magnets with a current consumption of less than 50 milliamps. By connection of a series-connected electro-hydraulic directional control valve means, the pre-control valves are connected to the control line, and at the same time are hydraulically locked.

REFERENCES:
patent: 2825306 (1958-03-01), Buri
patent: 3016917 (1962-01-01), Hunt
patent: 4046058 (1977-09-01), Grisebach
patent: 4105047 (1978-08-01), Smallwood
patent: 4638720 (1987-01-01), McKee

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