EP 2220379 B1 20121226 - HYDRAULIC VALVE DEVICE
Title (en)
HYDRAULIC VALVE DEVICE
Title (de)
HYDRAULISCHE VENTILVORRICHTUNG
Title (fr)
ENSEMBLE DISTRIBUTEUR HYDRAULIQUE
Publication
Application
Priority
- EP 2008009578 W 20081113
- DE 102007054135 A 20071114
Abstract (en)
[origin: WO2009062707A1] The invention relates to a hydraulic valve device having a fluid connector arrangement (10) comprising at least one pressure supply connector P for providing a pump pressure, a return flow connector R, - a section load sensing connector LS, two control connectors P'A and P'B, and two utility connectors A, B for providing a utility connection pressure, and having a displaceable control device (18) for at least partially controlling the connector arrangement (10), wherein a pressure balance (14) is connected upstream of the control device (18), and wherein the pressure balance (14) comprises a check valve (56). Because a fluid-conducting connection to the reverse flow connector R may be produced by means of the pressure balance (14) and the pressure balance (14) interacts with the check valve (56) such that, at least during control processes of the pressure balance (14) relating to the pressure supply connector P, the check valve (56) is held in the open position thereof such that fluid flowing back from one of the control connectors P'A, P'B flows in the direction of the return flow connector R controlled by the pressure balance (14), the control options are broadened for the valve device according to the invention.
IPC 8 full level
F15B 13/04 (2006.01)
CPC (source: EP US)
F15B 13/0417 (2013.01 - EP US); Y10T 137/7837 (2015.04 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102007054135 A1 20090520; DK 2220379 T3 20130211; EP 2220379 A1 20100825; EP 2220379 B1 20121226; EP 2220379 B8 20130410; JP 2011503483 A 20110127; US 2011132476 A1 20110609; WO 2009062707 A1 20090522
DOCDB simple family (application)
DE 102007054135 A 20071114; DK 08849706 T 20081113; EP 08849706 A 20081113; EP 2008009578 W 20081113; JP 2010533493 A 20081113; US 73428608 A 20081113