Foldable propellers

Details Foldable propellers Foldable propellers

1976-07-16

1978-06-20

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Working member foldable, pivotable or collapsible to non-use...

416140, B63H 124

Patent

active

040959198

ABSTRACT:
A fluid pump including a shaft arranged to be rotatably driven by a motor of the like which includes one or more blades pivotally mounted at their inner ends on the shaft so as to be freely pivotal during the rotation of the shaft into an equilibrium angular position throughout an angular range extending in both directions from a 90.degree. position and in an axial plane with respect to the axis of the shaft.

REFERENCES:
patent: 1491997 (1924-04-01), Messick
patent: 1682893 (1928-09-01), Cierva
patent: 1862481 (1932-06-01), Glenwright
patent: 2493869 (1950-01-01), Hafner
patent: 2500382 (1950-03-01), Rowley
patent: 3223389 (1965-12-01), Simmonds
patent: 3981613 (1976-09-01), Ehrenskjold et al.

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