Floatable devices for aquatic sports

Details Floatable devices for aquatic sports Floatable devices for aquatic sports

1979-05-21

1981-04-28

Halvosa, George E. A.

Marine propulsion

Oscillating propelling means

Having nonpropelling cycle segment

9310R, 440 21, B63H 130

Patent

active

042643139

ABSTRACT:
A rocking member is installed in a recess in a device floating on water by a pivot shaft extending approximately parallel to the surface of the water. Such rocking member has a bottom impelling surface displaceable upward and downward by swinging of the rocking member. A plurality of water-trapping wedge-shaped fins, extending approximately parallel to the pivot shaft and spaced apart longitudinally of the device, project downward from the rocking member impelling surface.

REFERENCES:
patent: 619714 (1899-02-01), Birkby
patent: 715882 (1902-12-01), Sheen
patent: 3122122 (1964-02-01), Jenkins
patent: 3232608 (1966-02-01), Vlacancich
patent: 3807342 (1974-04-01), Tarner
patent: 3833956 (1974-09-01), Meehan
patent: 3952353 (1976-04-01), Word

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