EP 0746690 A1 19961211 - HYDRAULIC PUMP CONTROL SYSTEM
Title (en)
HYDRAULIC PUMP CONTROL SYSTEM
Title (de)
REGELEINRICHTUNG FÜR EINE HYDROPUMPE
Title (fr)
SYSTEME REGULATEUR POUR POMPE HYDRAULIQUE
Publication
Application
Priority
- DE 4406318 A 19940226
- EP 9500611 W 19950221
Abstract (en)
[origin: DE4406318A1] A control system for a variable-displacement hydraulic pump having an adjustment device and being electrical current-adjustable as required for supplying pressure to a first hydraulic apparatus (13), and pressure-adjustable for supplying pressure to a second hydraulic apparatus (14), in which case the pressure rating and the setting of the pilot valve controlled by the second hydraulic apparatus (14) may be programmed by a control signal. The control system includes a first control valve (18) that can be actuated by the weight of the load of the first apparatus (13) and by a spring (23) when switching to a higher displacement, or by the pump pressure when switching to a lower displacement. The system further includes a second control valve (19) which can be exposed to a force corresponding to the control signal (25) when switching to a higher displacement, or to the pump pressure when switching to a lower displacement.
IPC 1-7
IPC 8 full level
F15B 11/02 (2006.01); F15B 11/05 (2006.01); F15B 11/16 (2006.01)
CPC (source: EP US)
F15B 11/165 (2013.01 - EP US); F15B 2211/20553 (2013.01 - EP US); F15B 2211/30525 (2013.01 - EP US); F15B 2211/3144 (2013.01 - EP US); F15B 2211/31511 (2013.01 - EP US); F15B 2211/329 (2013.01 - EP US); F15B 2211/355 (2013.01 - EP US); F15B 2211/605 (2013.01 - EP US); F15B 2211/67 (2013.01 - EP US); F15B 2211/71 (2013.01 - EP US)
Citation (search report)
See references of WO 9523292A1
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
DE 4406318 A1 19950831; DE 59504821 D1 19990225; EP 0746690 A1 19961211; EP 0746690 B1 19990113; JP H09510002 A 19971007; US 5720168 A 19980224; WO 9523292 A1 19950831
DOCDB simple family (application)
DE 4406318 A 19940226; DE 59504821 T 19950221; EP 9500611 W 19950221; EP 95909750 A 19950221; JP 52211595 A 19950221; US 69314896 A 19960809