Title:
CLOSED-SYSTEM ELECTROHYDRAULIC ACTUATOR
Document Type and Number:
WIPO Patent Application WO2006039262
Kind Code:
B1
Abstract:
An electrohydraulic actuator (10) includes a fluid-powered actuator (11) having a piston (15) in a cylinder (16). The piston divides the cylinder into two opposed chambers (18, 19). The actuator includes a fixed-displacement reversible motor-driven pump (13) having a first port communicating with one of the chambers and having a second port communicating with the other of the chambers in a closed hydraulic system. A precharged accumulator (14) communicates with the pump first port. One of the actuator chambers is maintained at a fixed pre-charged pressure of the accumulator, and the operation of the pump controls the pressure in, and volume of, the other chamber.
Inventors:
GEIGER DAVID (US)
Application Number:
PCT/US2005/034576
Publication Date:
August 24, 2006
Filing Date:
September 28, 2005
Export Citation:
Assignee:
MOOG INC (US)
GEIGER DAVID (US)
GEIGER DAVID (US)
International Classes:
F16D31/02
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