Variable pitch propeller

Details Variable pitch propeller Variable pitch propeller

1984-09-07

1987-07-07

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Motor bodily rotatable with impeller hub or shaft

416154, B64C 1142

Patent

active

046784020

ABSTRACT:
An impulse activated and controlled variable pitch propeller whereby the complete high pressure hydraulic system is incorporated in propeller hub assembly, including two identical type reciprocating hydraulic pumps which operate and control the propeller blade pitch settings by low force linear mechanical impulses transmitted from a remote stationary source through a pronged lever with input arm pivoting two anti-friction radial bearings attached to the pronged output ends for transmitting two equally balanced radial bearing contact forces in parallel on a rotating slidable flanged sleeve mounted on a propeller shaft adapter between the engine and the propeller, whereby said linear mechanical impulses are transmitted only during pitch change to actuate said pumps with the propeller otherwise free of any external mechanical contact during rotation.

REFERENCES:
patent: 1802808 (1931-04-01), DeNarde
patent: 1803858 (1931-05-01), MacClatchie
patent: 2609057 (1952-09-01), Crowhurst
patent: 2889888 (1959-06-01), Fairhurst
patent: 3219121 (1965-11-01), Barden
patent: 3240275 (1966-03-01), Bennett
patent: 3356156 (1967-12-01), Reid
patent: 3600102 (1971-08-01), Dirlik
patent: 3746466 (1973-07-01), Dallach et al.
patent: 4037986 (1977-07-01), Chilman

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