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US 2009/0014074 A1Published application
Hydraulic valve arrangement
AssigneeSauer-Danfoss ApS
InventorsMartin Raadkjaer Joergensen, Ken Petersen
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AssigneeSauer-Danfoss ApS
InventorsMartin Raadkjaer Joergensen, Ken Petersen
Estimating the term…
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).
A hydraulic valve arrangement having at least two working connections, a check valve being allocated to each working connection, and a pressure relief valve being allocated to each check valve, each pressure relief valve being connected to a control pressure passage, wherein the check valves can be opened by means of tappets, whose sides facing away from the check valves are ending in a pressure chamber, which is connected to the control pressure passage of one of the pressure relief valves.
Dependencies are inferred from the claim text.