EP 1574720 B1 20090311 - Electro-hydraulic control circuit and method of its deactivation
Title (en)
Electro-hydraulic control circuit and method of its deactivation
Title (de)
Elektrohydraulische Steuervorrichtung und Verfahren zu ihrer Abschaltung
Title (fr)
Commande électro-hydraulique et méthode de sa déactivation
Publication
Application
Priority
DE 202004003749 U 20040310
Abstract (en)
[origin: US2005199295A1] A electrohydraulic control device H for the direction control of a hydro-motor, particularly for working pressures u to more than about 450 bar in a portable working device, comprises working lines A, B and a pressure line P and a respective load holding valve LA, LB in each working line A, B which load holding valve is switched from a load holding position for the respective working line to open to a return system R when a main directional solenoid seat valve VA, VB is in a switching position connecting the pressure source P with the respective other working line, and a circulation switching assembly U effective between the pressure source P and the return system R when the working lines A, B are separated from the pressure source P contains as the respective load holding valve LA, LB a 2/2-directional solenoid seat valve which selectively and electrically is switched open towards the return system R for, by intention, relieving the working pressure from the associated working line A, B.
IPC 8 full level
F15B 11/00 (2006.01); B60T 13/74 (2006.01); F15B 11/02 (2006.01); F15B 13/04 (2006.01); F15B 13/044 (2006.01)
CPC (source: EP US)
F15B 11/003 (2013.01 - EP US); F15B 11/006 (2013.01 - EP US); F15B 2211/30505 (2013.01 - EP US); F15B 2211/30515 (2013.01 - EP US); F15B 2211/3057 (2013.01 - EP US); F15B 2211/3111 (2013.01 - EP US); F15B 2211/31529 (2013.01 - EP US); F15B 2211/327 (2013.01 - EP US); F15B 2211/45 (2013.01 - EP US); F15B 2211/46 (2013.01 - EP US); F15B 2211/6054 (2013.01 - EP US); Y10T 137/86622 (2015.04 - EP US); Y10T 137/87209 (2015.04 - EP US); Y10T 137/87217 (2015.04 - EP US)
Designated contracting state (EPC)
AT CH DE FR IT LI
DOCDB simple family (publication)
US 2005199295 A1 20050915; US 7320335 B2 20080122; AT E425370 T1 20090315; DE 202004003749 U1 20050728; DE 502004009132 D1 20090423; EP 1574720 A1 20050914; EP 1574720 B1 20090311
DOCDB simple family (application)
US 6205105 A 20050218; AT 04026604 T 20041109; DE 202004003749 U 20040310; DE 502004009132 T 20041109; EP 04026604 A 20041109