Fluid reaction surfaces (i.e. – impellers) – Ambient fluid or exhaust gas directed through hub – fairing...
Patent
1986-07-08
1988-05-17
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Ambient fluid or exhaust gas directed through hub, fairing...
416164, 416167, B63H 308
Patent
active
047447273
ABSTRACT:
A controllable pitch propeller assembly has an inner housing attached to a main drive shaft, the housing having rails on the outer surface thereof. Modules carrying the propeller blades are positively mounted on the rails, each module having a housing receiving a hub cylinder and bushings axially aligned at opposite sides thereof. Each pair of bushings receives an adjusting piston having an adjusting pin which engages a groove forming a control path in a propeller hub. Each blade is adjusted by a control lever which adjusts each adjusting piston through a mechanical linkage including an adjusting sleeve and a thrust bearing and flange. The hub is provided with open spaces formed between the inner and outer housings to create hub through exhaust ducts.
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