Foldable propeller assembly

Details Foldable propeller assembly Foldable propeller assembly

1988-05-16

1993-02-02

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Radially extensible or retractible rotor working member

416142, B63H 106, B63H 122

Patent

active

051833840

ABSTRACT:
A marine propeller assembly which folds completely parallel to a drive shaft axis when the boat motor is disengaged is disclosed. When the boat motor is disengaged the propeller blades fold rearward due to the force caused by the moving water under the boat. When the boat motor is engaged and the drive shaft beings to rotate, the centrifugal force causes the propeller blades to extend out 90 degrees to the drive shaft.

REFERENCES:
patent: D141235 (1945-05-01), Birsh
patent: 938291 (1909-10-01), Thompson
patent: 993126 (1911-05-01), Thompson
patent: 1771365 (1930-07-01), Woll
patent: 3255826 (1966-06-01), Beck
patent: 3982853 (1976-09-01), Beck
patent: 4204806 (1980-05-01), Blanchard
patent: 4364711 (1982-12-01), Brandt et al.

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