Actuator for variable-pitch propeller

Details Actuator for variable-pitch propeller Actuator for variable-pitch propeller

1991-09-30

1993-07-13

Peters, Jr., Joseph F.

Marine propulsion

Screw propeller

Variable pitch

440 49, 440 53, B63H 300, B63H 114, B63H 512, B63H 520

Patent

active

052268446

ABSTRACT:
A drive for a boat has a propeller hub rotatable about a main axis extending in a normal travel direction, a plurality of blades projecting generally radially of the main axis from the hub and each pivotal so as to be of variable pitch, and respective blade rods extending axially and displaceable axially relative to the hub to vary the pitch of the blades. A stator carried on the boat downstream in the direction from the hub and nonrotatable about the axis rotatably supports a cylinder housing that is releasably connected to the rods for joint axial movement therewith. A piston displaceable along the axis in the cylinder is releasably connected to the hub for joint axial movement therewith. Pressurizable lines extending through the stator are connected to the cylinder for alternately pressurizing the piston and thereby relatively axially shifting the rods and hub.

REFERENCES:
patent: 2704991 (1953-05-01), Danielson
patent: 2931443 (1956-02-01), Pehrsson
patent: 4929201 (1990-05-01), Pitt
patent: 4964822 (1990-10-01), Mueller

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