EP 1711662 A1 20061018 - HYDRAULIC CONTROL SYSTEM
Title (en)
HYDRAULIC CONTROL SYSTEM
Title (de)
HYDRAULISCHE STEUERANORDNUNG
Title (fr)
DISPOSITIF DE COMMANDE HYDRAULIQUE
Publication
Application
Priority
- DE 2004002565 W 20041119
- DE 10355329 A 20031127
Abstract (en)
[origin: WO2005052268A1] The invention relates to a hydraulic control system for controlling a hydraulic consumer (2, 4) that actuates a working tool (8) of a mobile equipment, said consumer being provided with a vibration damper (30) for damping the vibrations when the working tool is slowed down. According to the invention, said vibration damper has two opposed pilot-operated check valves (32, 34) that are located in a connecting line (36) between a pressure medium feed (26) and a pressure medium discharge (28). The check valves are impinged upon in the opening direction by the pressure in the discharge (28) or in the feed (26) section and in the closing direction by the same pressure and the force of a spring. The pressure acting upon the check valve (52) on the discharge side in the closing direction can be reduced after a predetermined initial lift of a slide valve of the control system so that the check valve is opened by the pressure and the connecting line between the feed and the return section is actuated to open.
IPC 8 full level
E02F 9/22 (2006.01); E02F 9/12 (2006.01); F15B 13/04 (2006.01); F15B 21/04 (2006.01)
CPC (source: EP US)
E02F 9/2207 (2013.01 - EP US); E02F 9/2214 (2013.01 - EP US); F15B 21/008 (2013.01 - EP US)
Citation (search report)
See references of WO 2005052268A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005052268 A1 20050609; AT E369465 T1 20070815; DE 10355329 A1 20050623; DE 502004004602 D1 20070920; EP 1711662 A1 20061018; EP 1711662 B1 20070808; JP 2007514896 A 20070607; JP 4682148 B2 20110511; US 2007130934 A1 20070614; US 7454906 B2 20081125
DOCDB simple family (application)
DE 2004002565 W 20041119; AT 04802777 T 20041119; DE 10355329 A 20031127; DE 502004004602 T 20041119; EP 04802777 A 20041119; JP 2006540157 A 20041119; US 58071504 A 20041119