Global Patent Index - EP 0877169 A3

EP 0877169 A3 2000-01-19 - Hydraulic control device for the load-independent control of a double acting actuator

Title (en)

Hydraulic control device for the load-independent control of a double acting actuator

Title (de)

Hydraulische Steuereinrichtung zur lastdruckunabhängigen Steuerung eines doppeltwirkenden Motors

Title (fr)

Dispositif de commande hydraulique indépendante de la pression de charge d'un moteur à double effet

Publication

EP 0877169 A3 (DE)

Application

EP 98102270 A

Priority

DE 19719228 A

Abstract (en)

[origin: EP0877169A2] The hydraulic control system for a double-action motor, independent of the loading, has a non-return valve (42) in the lateral channel (62) downstream from the pressure balance (12) and upstream of the piston slide (25) and separated from the throttle slide (48). The pressure pick-up opening (55) is upstream of the non-return valve. The relief mechanism is a piston section (30) at the piston slide which controls the connection between the measurement diaphragm chamber (20) at the outlet side and the adjacent feedback chamber (19). The throttle slide, in the start position, gives a throttled connection (51,49) between the pressure pick-up opening and the measurement chamber. The connection is blocked when the throttle slide is in the working position.

IPC 1-7 (main, further and additional classification)

F15B 11/05

IPC 8 full level (invention and additional information)

F15B 11/16 (2006.01); F15B 13/04 (2006.01); F15C 3/06 (2006.01)

CPC (invention and additional information)

F15B 13/0417 (2013.01); F15B 11/163 (2013.01); F15C 3/06 (2013.01); F15B 2211/30505 (2013.01); F15B 2211/30555 (2013.01); F15B 2211/3111 (2013.01); F15B 2211/3127 (2013.01); F15B 2211/351 (2013.01); F15B 2211/6054 (2013.01); F15B 2211/71 (2013.01); F15B 2211/78 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0877169 A2 19981111; EP 0877169 A3 20000119; EP 0877169 B1 20031203; DE 19719228 A1 19981112

INPADOC legal status


2015-01-30 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2004-01-15 [REF] CORRESPONDS TO:

- Document: DE 59810308 P 20040115

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1998-11-11 [AK] DESIGNATED CONTRACTING STATES:

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