Expansible chamber devices – With cushioning means effective over a portion only of stroke
Patent
1981-03-19
1984-04-03
Maslousky, Paul E.
Expansible chamber devices
With cushioning means effective over a portion only of stroke
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
Maslousky Paul E.
Pneumo Corporation
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