Rotatable, automatic fin device notably for a sail board or anal

Details Rotatable, automatic fin device notably for a sail board or anal Rotatable, automatic fin device notably for a sail board or anal

1989-04-24

1991-12-10

Peters, Jr., Joseph F.

Ships

Steering mechanism

Rudders

114128, 114152, 114169, B63B 3906

Patent

active

050708040

ABSTRACT:
The invention concerns a directional fin of variable incidence at which are associated: two springs for returning the fin to central position and a symmetrical supple tooth fittings break the oscillations toward the exterior and facilitate the return movement of the fin toward the center. The apparatus facilitates the maneuvers of the board and reduces the efforts of the wind surfer.

REFERENCES:
patent: 471202 (1892-03-01), Victor
patent: 491545 (1911-05-01), Rouiss
patent: 653601 (1900-07-01), Williamson
patent: 763701 (1904-06-01), Taylor
patent: 1593823 (1926-07-01), Gleason

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