Hydraulic valve arrangement

Details Hydraulic valve arrangement Hydraulic valve arrangement

2011-06-07

2011-06-07

Leslie, Michael (Department: 3745)

Motors: expansible chamber type

With motive fluid valve

Contracting chamber exhaust valve controlled by expanding...

C091S464000

Reexamination Certificate

active

07954420

ABSTRACT:
The invention concerns a hydraulic valve arrangement (1) having at least two working connections (A, B), a check valve (5, 6) being allocated to each working connection (A, B), and a pressure relief valve (7, 8) being allocated to each check valve (5, 6), each pressure relief valve (7, 8) being connected to a control pressure passage (17, 18). The valve arrangement shall ensure a reliable, pressure-less lowering, also in connection with single-actuated consumers, and further enable a pressure-less float position. For this purpose, the check valves (5, 6) can be opened by means of tappets (20, 21), whose sides facing away from the check valves (5, 6) are ending in a pressure chamber (22), which is connected to the control pressure passage (17, 18) of one of the pressure relief valves (7, 8).

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