EP 0092972 A3 19840516 - IMPROVEMENTS IN OR RELATING TO HYDRAULIC CONTROL SYSTEM
Title (en)
IMPROVEMENTS IN OR RELATING TO HYDRAULIC CONTROL SYSTEM
Publication
Application
Priority
GB 8211628 A 19820422
Abstract (en)
[origin: EP0092972A2] A hydraulic control system is disclosed comprising two actuators operating in parallel or tandem each having a separate supply of hydraulic fluid and two electrohydraulic servo control valves interposed between each actuator and its respective hydraulic supply, each control valve having two operating coils for the electrical operation thereof, the said coils being connected to four electrical control lanes in such a manner that each lane is connected to one coil of a control valve asociated with one actuator and with one coil of a control valve associated with the other actuator. Feedback control of the valves is preferably provided to equalise hydraulic imbalance, the valves for each actuator having differing overlap characteristics such that the feedback signal may apply selectively to the valves of one or other actuator.
IPC 1-7
IPC 8 full level
F15B 18/00 (2006.01)
CPC (source: EP)
F15B 18/00 (2013.01)
Citation (search report)
- [A] GB 2082799 A 19820310 - ELLIOTT BROTHERS LONDON LTD
- [A] GB 1029527 A 19660511 - MOOG SERVOCONTROLS INC
- [A] US 3915427 A 19751028 - SWOGGER EMERY C
- [A] GB 940942 A 19631106 - AMERICAN BRAKE SHOE CO
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0092972 A2 19831102; EP 0092972 A3 19840516; EP 0092972 B1 19860730; DE 3364878 D1 19860904
DOCDB simple family (application)
EP 83302247 A 19830420; DE 3364878 T 19830420