Variable-pitch propeller having feathering blades

Details Variable-pitch propeller having feathering blades Variable-pitch propeller having feathering blades

1991-09-06

1993-04-20

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Including movement limit stop or damping means

416142, 416208, 416214R, B63H 302

Patent

active

052036758

ABSTRACT:
A propeller to be used in particular for sail boats comprises a hub (2) fitted to the end of a drive shaft (5) and carrying a bevel toothing (8) meshing with bevel pinions (9) provided at the ends of corresponding propeller blades (10) mounted in a rotatable manner about their own axes between two annular shell halves (11, 12) covering the hub (2); and an adjusting element (21) coupled through cylindrical mating toothings (19) to the inner shell half (12) and detachably fastened thereto, the adjusting element internally carrying a circular sector (24) to be engaged by a corresponding circular sector (23) projecting from the outer hub outline so as to determine the boundary orientation positions of the blades (10); the propeller pitch being adjustable by disengagement of the mating toothings (19) between the adjusting element (21) and shell half (12), rotation of the adjusting element through a given angle and further engagement between the mating toothings (19).

REFERENCES:
patent: 1520746 (1924-12-01), Boyce et al.
patent: 2396630 (1946-03-01), Anderson
patent: 2477944 (1949-08-01), Rouse
patent: 3403735 (1968-10-01), Langhjelm et al.
patent: 4047841 (1977-09-01), Laurin
patent: 4140434 (1979-02-01), Bianchi

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