Propeller for boat

Details Propeller for boat Propeller for boat

1995-10-19

1997-01-14

Larson, James

Fluid reaction surfaces (i.e., impellers)

With control means responsive to non-cyclic condition...

Impeller rotation speed responsive

416 87, 416 93A, 416137, 416203, B63H 124, B63H 300

Patent

active

055932800

ABSTRACT:
In a propeller for a boat, a plurality of stationary blades and a plurality of variable blades are alternately disposed around an outer periphery of a propeller boss. Exhaust passages are formed in the propeller boss to axially pass through the propeller boss at location corresponding to the stationary blades. Despite the provision of the variable blade which is variable in diameter or pitch, the exhaust passage can be formed into a large sectional area in the blade boss without being obstructed by a blade shaft for the variable blade.

REFERENCES:
patent: 5466177 (1995-11-01), Aihara et al.
patent: 5494406 (1996-02-01), Takada et al.

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