System for powering the driving actuator of an aircraft undercar

Details System for powering the driving actuator of an aircraft undercar System for powering the driving actuator of an aircraft undercar

1992-11-20

1994-02-08

Look, Edward K.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Diverse paths used to control extent of working member travel

91 20, 91459, 91462, 60406, 60494, F01B 2502, F16D 3102

Patent

active

052840832

ABSTRACT:
The invention relates to a system for powering the driving actuator of an aircraft undercarriage, the system including a hydraulic generator capable of delivering fluid under pressure to one or the other of two chambers of the driving actuator. According to the invention, the power supply system includes a safety device enabling any overloading of the actuator rod under the effect of pressure peaks to be avoided: said device comprises two pressure relief valves, the first valve limiting the pressure delivered to the annular chamber and being under the control of the pressure in the full-section chamber, and the second pressure relief valve being of the differential type and continuously controlling the pressure difference between the two chambers of the actuator. The invention is applicable to providing very safe power supply systems for aircraft undercarriages.

REFERENCES:
patent: 1073954 (1913-09-01), Burns
patent: 1905065 (1933-04-01), Scholl
patent: 2657533 (1953-11-01), Schanzlin
patent: 3054383 (1962-09-01), Hanna
patent: 3082746 (1963-03-01), Kerridge
patent: 3470792 (1969-10-01), Darling
patent: 3472127 (1969-10-01), Scheidt
patent: 3559535 (1971-02-01), Conolly
patent: 3908515 (1975-09-01), Johnson
patent: 5079492 (1992-01-01), Takagi

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