EP 1548289 A1 20050629 - Electro-hydrostatic actuator
Title (en)
Electro-hydrostatic actuator
Title (de)
Elektrohydrostatischer Stellantrieb
Title (fr)
Actionneur électro-hydrostatique
Publication
Application
Priority
EP 03029549 A 20031222
Abstract (en)
An electro-hydrostatic actuator having a sealed housing (12) filled with a dielectric fluid. A motor driven pump (30) and electronics (25) for controlling the pump are all immersed in the fluid. The pump (30) is arranged to deliver fluid from the housing to a hydraulic cylinder (37) to control the positioning of the piston rod. A solenoid operated valve (43) is integrated as a bypass or tip valve for quick fail safe position. The actuator is ideally suited to control various types of plunger valves. In one embodiment of the invention, the hydraulic cylinder is located outside of the housing and in another embodiment the cylinder is located inside of the housing. <IMAGE>
IPC 1-7
IPC 8 full level
F15B 15/18 (2006.01)
CPC (source: EP)
F15B 15/18 (2013.01)
Citation (search report)
- [Y] US 2003077183 A1 20030424 - FRANCHET MICHEL [FR], et al
- [Y] DE 3423316 A1 19860102 - BOSCH GMBH ROBERT [DE]
- [AY] US 3572032 A 19710323 - TERRY WILLIAM M
- [Y] EP 0395420 A2 19901031 - PARKER HANNIFIN CORP [US]
- [AY] EP 0048778 A1 19820407 - SKIL CONTROLS LIMITED [GB]
- [AY] WO 03016718 A1 20030227 - ADVANCED ROTARY SYSTEMS LLC [US], et al
- [AY] US 5117633 A 19920602 - BAYER JACOB [US], et al
- [AY] US 3505814 A 19700414 - BEARD CHESTER S, et al
- [AY] GB 822164 A 19591021 - ELECTROL INC
- [DA] US 2631431 A 19530317 - OTTO GREBE
- [A] US 5109672 A 19920505 - CHENOWETH CHARLES C [US], et al
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 03029549 A 20031222