Variable pitch propeller apparatus

Details Variable pitch propeller apparatus Variable pitch propeller apparatus

1990-09-28

1992-10-27

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Power or manual actuator on non-rotatable part

416164, 416135, 416147, 416149, B63H 106

Patent

active

051596202

ABSTRACT:
The invention relates to a propeller assembly, particularly suitable for use with axial flow pumps. The propeller assembly is provided with a cam-operated rotatable propeller blade compression shaft which rotates in response to a detected increase load on the propeller blade. An elongated rod connected to a power source transmits movement to a spring which, in turn, transmits the movement to the cam. To accommodate tilting of the propeller blade during changing of the pitch, a hub outer surface is formed convex and the inner surface of the enclosing shroud is formed concave. The radii of curvature of the hub and the shroud are generally complementary to the radius of curvature of the inner and outer surfaces of the propeller blade, respectively.

REFERENCES:
patent: 1491589 (1924-04-01), Dzus
patent: 2850106 (1958-09-01), Swan
patent: 3295610 (1967-01-01), Frias
patent: 3367424 (1968-02-01), Fukasu et al.
patent: 3792937 (1974-02-01), Chilman
patent: 3912417 (1975-10-01), Herbert
patent: 4545734 (1985-10-01), Schilder
patent: 4810166 (1989-03-01), Sawizky et al.

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