Automatic variable discrete pitch marine propeller

Details Automatic variable discrete pitch marine propeller Automatic variable discrete pitch marine propeller

1993-11-15

1994-11-29

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Power or manual actuator on non-rotatable part

416168R, B63H 106

Patent

active

053684427

ABSTRACT:
A self-actuating variable pitch marine propeller which incorporates two or more blades which are rotatably connected to a central hub; the blades rotate relative to the hub center about the shank axis. In operation, the blades are biassed towards the lower pitch, both by mechanical means, such as a spring, and optionally also by hydrodynamic load means. As the propeller rotational speed increases, centrifugal forces act to move the blades towards the higher pitch position. In one alternative mode the hydrodynamic load also acts towards the higher pitch position. There is further provided a holding mechanism to retain or hold the blades at least preferably in the lower pitch position, the holding mechanism being so designed that at a sharply defined combination of parameters, including rotational speed and optimally hydrodynamic load acting on the blades, the holding mechanism is caused to be released and the blades permitted to move to a second higher pitch position.

REFERENCES:
patent: 1389609 (1921-09-01), Weiher
patent: 1986752 (1935-01-01), Rorvik
patent: 2023684 (1935-12-01), Hubbell
patent: 2055196 (1936-09-01), Fuchs
patent: 2694459 (1954-11-01), Biermann
patent: 2949966 (1960-08-01), Simshauser
patent: 2955659 (1960-10-01), Daley
patent: 2988156 (1961-06-01), Coleman
patent: 3177948 (1965-04-01), Reid
patent: 3231023 (1966-01-01), Marshall
patent: 3567336 (1971-03-01), Bartha
patent: 4419050 (1983-12-01), Williams
patent: 4599043 (1986-07-01), Muller
patent: 4792279 (1988-12-01), Bergeron
patent: 5022820 (1991-06-01), Bergeron

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