Control of the actuation of hydraulic consumers

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

E - Fixed Constructions

21

D

137/82

E21D 23/16 (2006.01) F15B 11/22 (2006.01) F15B 21/08 (2006.01)

Patent

CA 1285850

ABSTRACT OF THE DISCLOSURE 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 millamps. 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.

515632

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