Aeronautics and astronautics – Aircraft – heavier-than-air – Beating wing sustained
Reexamination Certificate
2005-04-12
2005-04-12
Eldred, J. Woodrow (Department: 3644)
Aeronautics and astronautics
Aircraft, heavier-than-air
Beating wing sustained
C244S072000, C416S083000, C440S013000
Reexamination Certificate
active
06877692
ABSTRACT:
The invention provides a propulsion system based on “thuniform” movement of a foil member to achieve desired directional movement of a vehicle such as an unmanned submarine type of vessel. A pair of foil members are mounted to the vehicle body for reciprocating oscillating movement towards and away from each other, creating forward movement due to the compression of a fluid medium between the foil members and the expulsion of the compressed fluid rearwardly of the foil members. Each foil member is mounted to a pivot shaft for limited rotational movement with respect to the vehicle body. Damping means are connected between each pivot shaft and its associated foil member so that during operation of the propulsion system damping torque will offset hydrodynamic loads imposed on the foil members by the fluid medium. The damping means will in turn control the pitch angle of the foil members during operation, meaning that a thrust is generated for rigid foil members when moving at zero forward speed. The propulsion system of the invention exhibits increased efficiency and thrust in comparison to other such propulsion systems. The foil members are mounted to the vehicle body in such a manner that the thrust vector thereof can be directed through a full 360 degrees relative to the vehicle, thereby achieving superb maneuverability when the vehicle is provided with sets of the thrusters suitable located thereon.
REFERENCES:
patent: 4490119 (1984-12-01), Young
patent: 4688994 (1987-08-01), Gongwer
patent: 5401196 (1995-03-01), Triantafyllou et al.
patent: 6179683 (2001-01-01), Pell et al.
patent: 6250585 (2001-06-01), Pell
patent: 6378801 (2002-04-01), Pell et al.
patent: 6746287 (2004-06-01), Yamamoto et al.
John Coxon , “The Development of a Self Pitching Propeller System,” Woodcoxon Engineering International Ltd.
Eldred J. Woodrow
Jones Tullar & Cooper PC
National Research Council of Canada
LandOfFree
Oscillating foil propulsion system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oscillating foil propulsion system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillating foil propulsion system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3423423