Flow actuated fin system for water sport boards and the like

Details Flow actuated fin system for water sport boards and the like Flow actuated fin system for water sport boards and the like

1991-12-27

1992-10-06

Sotelo, Jesus D.

Buoys, rafts, and aquatic devices

Water skimming or walking device

Surfboard

441 65, 441 79, 114282, 114130, B63B 3579, B63B 3500, B63B 130, B63B 338

Patent

active

051527057

ABSTRACT:
A multiple fin surfboard defines a generally elongated planar surfboard having a plurality of elongated slots defined therein. The slots are grouped close to each end of the surfboard and support a corresponding plurality of fins in a pivotal attachment. The fins each support transverse vanes which are acted upon by a water passage beneath the surfboard to alternatively retract the fins at one end of the surfboard and downwardly extend the fins at the opposite end of the surfboard.

REFERENCES:
patent: 3317937 (1967-05-01), Gallagher
patent: 3910215 (1975-10-01), Soderman
patent: 4321048 (1982-03-01), Marchese
patent: 4364324 (1982-12-01), Warner
patent: 4805546 (1989-02-01), Geller
patent: 4883436 (1989-11-01), Oakland
patent: 5002378 (1991-11-01), Bateman
patent: 5014955 (1991-05-01), Thompson

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