Inboard servo for marine controllable pitch propellers

Details Inboard servo for marine controllable pitch propellers Inboard servo for marine controllable pitch propellers

1987-08-03

1989-10-10

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Power or manual actuator on non-rotatable part

416 46, 416 49, 416154, B63H 308

Patent

active

048728110

ABSTRACT:
An inboard servo for a controllable pitch propeller of the force rod type comprises a feedback device having at least two feedback rods connected to the piston and extending through the cylinder end wall and an output ring connected to the rods. An emergency lock-up includes at least two threaded locking rods fastened to the cylinder and passing freely through holes in the feedback ring, each of which receives one or more nuts that can be threaded along the rod for engagement with the feedback ring to lock the piston in a desired position.

REFERENCES:
patent: 2032254 (1936-02-01), Caldwell
patent: 2523053 (1950-09-01), Obrist
patent: 2807327 (1957-09-01), Scott
patent: 2812026 (1957-11-01), Branddon
patent: 3027949 (1962-04-01), Biermann
patent: 3261405 (1966-07-01), Andrews
patent: 3575529 (1971-04-01), Bierman
patent: 4428716 (1984-01-01), Maloof
patent: 4648798 (1987-03-01), Voisard
patent: 4650402 (1987-03-01), Jones et al.

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