Cyclodial propulsion system

Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Continuous rotation about plural axes

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416108, F03D 306

Patent

active

054624061

ABSTRACT:
The present invention provides an offset control mechanism and a variable blade-pitch mechanical kinematic system for cycloidal propellers. This is achieved by the concentric positioning of the drive shaft, the variable offset circular guide track, the eccentric X-Y slide plates, the propeller hub and the variable blade-pitch kinematic linkages, all about the axis of propeller rotation. The control actuation system is free-flooded in water and non-rotating, yet in close proximity to the rotating propeller hub. The pitch of each propeller blade is cyclically varied by the kinematic levers on each blade following a circular guide track during each revolution. Additionally, the circlar track swivel guide in the blade lever kinematics can also lever a trailing blade-flap to provide additional cyclic propeller lift in the direction of motion. The propeller improvements include a low-drag propeller hub and a variable-pitch blade ground plane ring about the ends of the blades.

REFERENCES:
patent: 3611826 (1971-10-01), Fisher et al.
patent: 3704961 (1972-12-01), Fork et al.
patent: 4168439 (1979-09-01), Palma
patent: 4210299 (1980-07-01), Chabonat
patent: 4380417 (1983-04-01), Fork
patent: 4424002 (1984-01-01), Nishiyama
patent: 4609827 (1986-09-01), Nepple
patent: 4664636 (1987-05-01), Blickle et al.
patent: 4752258 (1988-06-01), Hochleitner et al.
J. M. Voith GmbH, "The Voith-Schneider Propeller and its Incorporation in Ship Design."

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