Controllable pitch propeller arrangement
AssigneeElectric Boat Corporation
InventorsStephen Eaves, James S. Smith
Life of this patent
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Abstract
In the particular embodiments described in the specification, a controllable pitch propellor arrangement includes a plurality of propellor blades supported from a central hub which is rotatably mounted on a shaft in which each blade is pivotally supported from the central hub. Two radial pins extending from the outer ends of each of the blades are received in corresponding rims having peripherally disposed permanent magnet arrays. The rims are rotated to drive the propellor by energization of coils in a stator assembly surrounding the rims and the pitch of the blades is changed by changing the phase relationship of the current supplied to the stator coils to change the angular relation of the rims.
Claims9
A controllable pitch propellor arrangement comprising:
- a stator assembly having a plurality of windings;
- a plurality of radially projecting propellor blades rotatably supported within the stator assembly;
- a plurality of adjacent rotatable rims surrounding the plurality of propeller blades;
- and
- pivotal connections between each of the blades and each of the rims;
- wherein the windings in the stator assembly produce electromagnetic interaction with the rims to rotate the rims and blades and to change the relative positions of the rims with respect to each other so as to control the pitch of the blades.
Dependencies are inferred from the claim text.