Adjustable propeller

Details Adjustable propeller Adjustable propeller

1989-09-08

1990-11-27

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Motor bodily rotatable with impeller hub or shaft

416 93A, B63H 308

Patent

active

049732250

ABSTRACT:
A controllable pitch propeller, particularly for a boat drive, has a driven rotating hub and adjustable propeller blades positioned thereon. An adjustment device is provided, having an adjustment ring that can move axially and which has adjustment bars attached to it for adjustment of the propeller blades. At least one continuous waste gas channel is positioned in the hub. In order to relieve the hub of external adjustment forces, the adjustment ring is constructed as a cylinder piston which is movably axially positioned in a cylinder chamber of the hub, and which can be acted upon hydraulically on both sides.

REFERENCES:
patent: 2353773 (1944-07-01), Unterberg
patent: 2355039 (1944-08-01), Eves
patent: 3051249 (1962-08-01), Dirlik
patent: 3056457 (1962-10-01), MacFarland
patent: 3232350 (1966-02-01), Lorenz
patent: 3338313 (1967-08-01), Tolley et al.
patent: 3412808 (1968-11-01), Parr
patent: 3600102 (1971-08-01), Dirlik
patent: 3895883 (1975-07-01), Pedersen
patent: 4599043 (1986-07-01), Muller
patent: 4744727 (1988-05-01), Muller
EP0281022 9-1988 Europe Muller 416-93 A.
W086/01173 2-1986 416-93 A.

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