Electric integrated actuator with variable gain hydraulic output

Details Electric integrated actuator with variable gain hydraulic output Electric integrated actuator with variable gain hydraulic output

1984-12-28

1987-05-26

Chambers, A. Michael

Power plants

Pressure fluid source and motor

Distinct structure metering and dispensing a stroke length...

60390, 60391, 60475, 60476, 277 27, 92 86, F16D 3102

Patent

active

046674721

ABSTRACT:
This invention relates to integrated electro-hydraulic actuators for use aboard aircraft or elsewhere. A balanced, double-acting hydraulic ram or motor (12) is connected between a support (16) and a member to be moved relative to the support. The ram includes first and second changeable volume hydraulic chambers (30, 32). A reversible hydraulic pump (38) is connected by a pair of conduits (44, 46) to the ram chambers (30, 32). The pump (38) displaces hydraulic fluid from one chamber to another for the purpose of causing a pressure differential between them. A hydraulic accumulator (60) provides leakage makeup fluid to the actuator, and further provides a quiescent pressure to the actuator when it is in a substantially nonoperative condition. A conduit (62) may connect the accumulator (60) to the ram (12). A laminar leakage flow path within the actuator permits hydraulic connection of the accumulator (60) to the ram (12) without use of valves.

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