EP 0620932 B1 19980729 - ELECTRO-HYDRAULIC CONTROL DEVICE AND PRESSURE REDUCING VALVE
Title (en)
ELECTRO-HYDRAULIC CONTROL DEVICE AND PRESSURE REDUCING VALVE
Title (de)
ELEKTROHYDRAULISCHE STEUERVORRICHTUNG UND DRUCKMINDERVENTIL
Title (fr)
DISPOSITIF DE COMMANDE ELECTROHYDRAULIQUE ET VANNE DE DETENTE
Publication
Application
Priority
- DE 4237901 A 19921110
- EP 9303129 W 19931109
Abstract (en)
[origin: WO9411797A1] An electro-hydraulic control device (S) for a clamping device of an automatic lathe, with a pressure reducing valve (V) connected to a pressure source (1), the output of which can be connected via a directional control valve (W) to two user lines (11, 12) operable alternately, with a pressure switching device (D) fitted in the pressure reducing valve (V) and with a regulating input (20) to which control pressure can be applied, whereby in the directional control valve (W) there is a user pressure tapping (Z) at which the control pressure exists only in the control position (a and/or b) of the multi-way valve where the output (6) of the pressure reducing valve (V) is properly connected to a user line (11, 12), and in which the pressure tapping (Z) is connected to the control input (20). In the pressure reducing valve (V), between the control piston (14) and the pressure switching device (D) there is a mechanical, motion-transmitting link with which the pressure switching device (D) is actuatable directly by the control piston (14) once the monitoring pressure set via the force of the spring (22) has been reached.
IPC 1-7
IPC 8 full level
B23B 31/30 (2006.01); F15B 11/028 (2006.01); G05D 16/16 (2006.01)
CPC (source: EP)
F15B 11/028 (2013.01); F15B 2211/20515 (2013.01); F15B 2211/20538 (2013.01); F15B 2211/212 (2013.01); F15B 2211/30505 (2013.01); F15B 2211/30535 (2013.01); F15B 2211/3138 (2013.01); F15B 2211/327 (2013.01); F15B 2211/50536 (2013.01); F15B 2211/528 (2013.01); F15B 2211/55 (2013.01); F15B 2211/615 (2013.01); F15B 2211/7053 (2013.01)
Designated contracting state (EPC)
AT CH ES FR GB IT LI
DOCDB simple family (publication)
WO 9411797 A1 19940526; AT E169132 T1 19980815; DE 4237901 A1 19940511; DE 4237901 C2 19960201; EP 0620932 A1 19941026; EP 0620932 B1 19980729; ES 2119145 T3 19981001; JP 3632927 B2 20050330; JP H07502936 A 19950330; KR 100238784 B1 20000115; TW 273588 B 19960401
DOCDB simple family (application)
EP 9303129 W 19931109; AT 94900117 T 19931109; DE 4237901 A 19921110; EP 94900117 A 19931109; ES 94900117 T 19931109; JP 51169994 A 19931109; KR 19940701984 A 19940610; TW 82110756 A 19931218