EP 0081703 B1 19860226 - ELECTRO-HYDRAULIC ACTUATOR
Title (en)
ELECTRO-HYDRAULIC ACTUATOR
Publication
Application
Priority
DE 3148174 A 19811205
Abstract (en)
[origin: EP0081703A1] 1. Electrohydraulic positioning drive having a reversible pump (11) which is driven by an electric motor (10) and delivers pressure medium, in each case via one of two pressure lines (12, 13), to a double-acting adjusting member (16), an adjustable throttle means (22, 25) being connected onto the pressure lines, by means of which throttle means (22, 25) a connection can be made to a chamber of low pressure, characterised in that the adjusting member is a directional control valve (16), the slide valve (17) of which is acted upon on both sides by centering springs (18, 19), in that a throttle valve (22, 25) is connected on each directional control valve chamber (14, 15) acted upon by the pump, which throttle valve (22, 25) is connected to a chamber (21) of lower pressure, and in that the throttle valves are coupled and are adjustable in opposite directions.
IPC 1-7
IPC 8 full level
F15B 11/08 (2006.01); F15B 7/00 (2006.01); F15B 13/04 (2006.01); F15B 13/042 (2006.01)
CPC (source: EP)
F15B 7/006 (2013.01); F15B 13/0402 (2013.01)
Citation (examination)
- US 4218884 A 19800826 - GOLD HAROLD [US]
- DE 2940403 A1 19810409 - REXROTH GMBH G L [DE]
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0081703 A1 19830622; EP 0081703 B1 19860226; DE 3148174 A1 19830609; DE 3269488 D1 19860403; JP S58102807 A 19830618
DOCDB simple family (application)
EP 82110794 A 19821123; DE 3148174 A 19811205; DE 3269488 T 19821123; JP 20624482 A 19821126