Hydraulic cowl door actuator with anti-vibration loading device,

Expansible chamber devices – With cushioning means effective over a portion only of stroke

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Details

92 52, 92 85B, 92113, F01B 1102

Patent

active

044400683

ABSTRACT:
A single ended hydraulic actuator requiring hydraulic pressure to extend the piston for raising the cowl door of a jet engine and the like. A preload spring device carried in the piston-rod assembly produces an extend force when the actuator is retracted and the door is closed which preloads the actuator to help eliminate fretting of the bearings and piston rod which otherwise can occur due to flight vibrations when unloaded.

REFERENCES:
patent: 1519599 (1924-12-01), Street
patent: 2266867 (1941-12-01), Hume
patent: 2564530 (1951-08-01), Guery
patent: 3803988 (1974-04-01), Orr
patent: 3838759 (1974-10-01), Schmoelz et al.
patent: 3877344 (1975-04-01), Langland
patent: 3878769 (1975-04-01), Farmer
patent: 4043254 (1977-08-01), Jaeger

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