Hydraulic valve arrangement with control/regulating function
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United States of America Patent
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Apr 30, 2019
Grant Date -
May 21, 2015
app pub date -
Nov 19, 2014
filing date -
Nov 19, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a hydraulic valve arrangement for controlling/regulating at least one hydraulic consumer of a mobile machine, with a summation interconnection of at least two hydraulic valves and at least one consumer interconnection of hydraulic valves, wherein the outputs of the summation interconnection are hydraulically connected with the inputs of the consumer interconnection, wherein at least one backflow valve is provided in the consumer interconnection. According to the invention, the at least one backflow valve for throttling a consumer return volume flow opens or closes in dependence on a consumer inflow pressure and comprises at least one main piston arranged in a bushing and at least two further pistons arranged in a lid separate from the bushing, wherein the main piston and the control piston interact with each other via a compression spring.
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