EP 2171289 A1 20100407 - CONTROL DEVICE FOR AT LEAST TWO HYDRAULIC DRIVES
Title (en)
CONTROL DEVICE FOR AT LEAST TWO HYDRAULIC DRIVES
Title (de)
STEUERVORRICHTUNG FÜR MINDESTENS ZWEI HYDRAULISCHE ANTRIEBE
Title (fr)
DISPOSITIF DE COMMANDE POUR AU MOINS DEUX COMMANDES HYDRAULIQUES
Publication
Application
Priority
- CH 2008000328 W 20080723
- CH 12292007 A 20070802
Abstract (en)
[origin: WO2009015502A1] The invention relates to a control device for at least two hydraulic drives, which can be controlled by control blocks (3.1; 3.2). The hydraulic drives can be controlled by means of directional valves (11.1; 11.2), which in turn can be controlled by means of proportional pressure-reducing valves (13.1, 14.1; 13.2, 14.2) acting as pilot control valves. According to the invention, the control blocks (3.1; 3.2) comprise a pressure governor (12.1; 12.2) connected upstream and a controllable pressure splitter. A hydraulically controlled 2/2 proportional way valve (15.1; 15.2) is connected between the proportional pressure-reducing valves (13.1, 14.1; 13.2, 14.2) and the hydraulic control inputs of the directional valve (11.1; 11.2) and forms the pressure splitter in conjunction with choke points (30.1, 40.1; 30.2, 40.2). A plurality of such control blocks can be connected in series to control a plurality of loads. In this way, disadvantageous effects of insufficient supply can be avoided, without requiring additional external components.
IPC 8 full level
F15B 11/16 (2006.01); E02F 9/22 (2006.01); F15B 13/043 (2006.01)
CPC (source: EP)
B66F 9/22 (2013.01); E02F 9/2221 (2013.01); E02F 9/226 (2013.01); E02F 9/2296 (2013.01); F15B 11/163 (2013.01); F15B 11/166 (2013.01); F15B 13/0433 (2013.01); F15B 2211/20553 (2013.01); F15B 2211/30535 (2013.01); F15B 2211/3111 (2013.01); F15B 2211/3144 (2013.01); F15B 2211/329 (2013.01); F15B 2211/351 (2013.01); F15B 2211/355 (2013.01); F15B 2211/465 (2013.01); F15B 2211/6052 (2013.01); F15B 2211/6054 (2013.01); F15B 2211/67 (2013.01); F15B 2211/7053 (2013.01); F15B 2211/7058 (2013.01); F15B 2211/75 (2013.01)
Citation (search report)
See references of WO 2009015502A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2009015502 A1 20090205; CH 700344 B1 20100813; EP 2171289 A1 20100407
DOCDB simple family (application)
CH 2008000328 W 20080723; CH 12292007 A 20070802; EP 08772899 A 20080723