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    Hydraulic valve arrangement with control/regulating function
    11.
    发明授权
    Hydraulic valve arrangement with control/regulating function 有权

    公开(公告)号：US10273987B2

    公开(公告)日：2019-04-30

    申请号：US14547515

    申请日：2014-11-19

    申请人： Liebherr-Mining Equipment Colmar SAS

    发明人： Patrick Stephan ,  Pascal Progin ,  Michael Deeken ,  Volker Gliniorz ,  Phlipp Hahn

    IPC分类号： F15B13/04 ,  F15B13/044 ,  F15B11/00 ,  F15B13/042

    摘要： 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.