EP 0809737 B1 19990616 - ELECTROHYDRAULIC PROPORTIONAL CONTROL VALVE ASSEMBLIES
Title (en)
ELECTROHYDRAULIC PROPORTIONAL CONTROL VALVE ASSEMBLIES
Title (de)
ELEKTROHYDRAULISCHE PROPORTIONALE STEUERVENTILVORRICHTUNG
Title (fr)
ENSEMBLES DE VANNES ELECTROHYDRAULIQUES A REGULATION PAR ACTION PROPORTIONNELLE
Publication
Application
Priority
- GB 9600393 W 19960222
- GB 9503854 A 19950225
Abstract (en)
[origin: GB2298291A] An electrohydraulic proportional control valve assembly 1 for controlling a bidirectional fluid actuated device 7 has a first actuating port 4 for bidirectional fluid flow between the assembly and a first port of the device 7, a second actuating port 5 for bidirectional fluid flow between the assembly and a second port of the device 7, a pump port 15, 16 for input fluid flow from a pump 17, and a tank port 18, 19 for output fluid flow from a tank 20. The assembly 1 comprises a first and second spool valves 2 and 3 operable independently of each other. A position sensing arrangement 23, 24 is provided for supplying electrical position signals indicative of the actual positions of the spools 12, 13 of the first and second spool valves 2, 3 and a pressure sensing arrangement 26, 27, 28 and 29 is provided for supplying electrical pressure signals indicative of the fluid pressures in the first and second actuating ports 4, 5, the pump port 15, 16 and the tank port 18, 19. A servo control (not shown) controls the positions of the first and second spools 2, 3 in dependence on the electrical position and pressure signals and in response to an electrical demand signal provided in response to operator actuation, in order to set the throughflow cross-sections for fluid flow to effect the required control of the device 7.
IPC 1-7
IPC 8 full level
E02F 9/20 (2006.01); E02F 9/22 (2006.01); F15B 11/04 (2006.01); F15B 11/16 (2006.01); F15B 21/08 (2006.01)
CPC (source: EP KR)
E02F 9/20 (2013.01 - KR); E02F 9/2025 (2013.01 - EP); E02F 9/22 (2013.01 - KR); E02F 9/2228 (2013.01 - EP); E02F 9/2285 (2013.01 - EP); F15B 11/163 (2013.01 - EP); F15B 11/167 (2013.01 - EP); F15B 21/087 (2013.01 - EP); F15B 2211/3057 (2013.01 - EP); F15B 2211/327 (2013.01 - EP); F15B 2211/50536 (2013.01 - EP); F15B 2211/5157 (2013.01 - EP); F15B 2211/575 (2013.01 - EP); F15B 2211/6309 (2013.01 - EP); F15B 2211/6313 (2013.01 - EP); F15B 2211/634 (2013.01 - EP); F15B 2211/6346 (2013.01 - EP); F15B 2211/6654 (2013.01 - EP)
Citation (examination)
- US 5138838 A 19920818 - CROSSER JEFFREY A [US]
- DE 3347000 A1 19850704 - BOSCH GMBH ROBERT [DE]
- EP 0038128 A1 19811021 - GEN SIGNAL CORP [US]
- US 33846 A 18611203
Designated contracting state (EPC)
BE DE DK FR IT NL SE
DOCDB simple family (publication)
GB 2298291 A 19960828; GB 2298291 B 19980610; GB 2298291 C 20080226; GB 9603811 D0 19960424; CN 1070974 C 20010912; CN 1175988 A 19980311; DE 69602923 D1 19990722; DE 69602923 T2 19991209; DE 69602923 T3 20080521; DK 0809737 T3 19991122; DK 0809737 T4 20080107; EP 0809737 A1 19971203; EP 0809737 B1 19990616; EP 0809737 B2 20070919; GB 9503854 D0 19950419; JP 2006177561 A 20060706; JP H11501106 A 19990126; KR 100432381 B1 20040916; KR 19980702483 A 19980715; WO 9627051 A1 19960906; WO 9627051 B1 20010412
DOCDB simple family (application)
GB 9603811 A 19960222; CN 96192050 A 19960222; DE 69602923 T 19960222; DK 96903123 T 19960222; EP 96903123 A 19960222; GB 9503854 A 19950225; GB 9600393 W 19960222; JP 2006032753 A 20060209; JP 52608496 A 19960222; KR 19970705883 A 19970825