EP 0603722 B1 19970423 - Hydraulic control system
Title (en)
Hydraulic control system
Title (de)
Hydraulische Steuervorrichtung
Title (fr)
Dispositif de commande hydraulique
Publication
Application
Priority
DE 4243973 A 19921223
Abstract (en)
[origin: EP0603722A1] In a hydraulic control system (V) for at least one hydraulic consumer (5, 6) of a mobile crane (K), which control system (V) has a directional control spool, connected on the one side to a pressure line (15) and a return line (16) and on the other side to two working lines (17, 18) to the hydraulic motor and having an adjustable spool piston (21), as well as a volume-reducing device (M) which can be brought into engagement as a function of a critical loading state and with which at least the volume of the hydraulic medium flowing to the hydraulic motor can be reduced, the directional control spool is designed as a proportional directional control spool (S1 to S8) with a feed-control pressure balance (Z) connected upstream in the pressure line (15a), and the volume-reducing device (M) is arranged constructionally separate from the spool piston (21) so that it engages between the feed-control pressure balance (Z) and the proportional directional control spool (S1 to S8) or on the feed-control pressure balance (Z) or on the spool piston (21). <IMAGE>
IPC 1-7
IPC 8 full level
F15B 11/05 (2006.01); F15B 11/16 (2006.01)
CPC (source: EP)
F15B 11/003 (2013.01); F15B 11/162 (2013.01); F15B 2211/50545 (2013.01)
Designated contracting state (EPC)
AT CH DE DK GB IT LI NL SE
DOCDB simple family (publication)
EP 0603722 A1 19940629; EP 0603722 B1 19970423; AT E152213 T1 19970515; DE 4243973 C1 19940707; DE 59306264 D1 19970528; DK 0603722 T3 19970908
DOCDB simple family (application)
EP 93120202 A 19931215; AT 93120202 T 19931215; DE 4243973 A 19921223; DE 59306264 T 19931215; DK 93120202 T 19931215