Marine propulsion – Operator powered drive for propelling means
Patent
1987-03-12
1989-02-14
Basinger, Sherman D.
Marine propulsion
Operator powered drive for propelling means
416 70R, 440101, 441 76, A63C 1503
Patent
active
048043451
ABSTRACT:
Equipment for towless skiing on water surface includes a pair of propulsion sticks having buoyant members at one end and handles at the other end. The buoyant members provide increased thrust against the hydrodynamic resistance of the water, and the shape of the buoyant members permits removal of the buoyant members from the water with little resistance. The equipment also includes a pair of skis comprised of foam material and provided with stabilizing shoulders on both sides of each ski for minimizing the effect of nose diving and rolling of the skis in the surf. The cross-sectional areas of the buoyant members and of the skis are such that maximum propulsion forces are provided. The skis are designed to endow the surf skier with a greater degree of freedom during surf skiing and to enable the skier to ski for longer distances on the water.
REFERENCES:
patent: 1533023 (1925-04-01), Meredith
patent: 2482074 (1949-09-01), Stephens
patent: 2589698 (1952-03-01), Jackson
patent: 3144849 (1964-08-01), Maser
patent: 3426721 (1969-02-01), Justinien
patent: 4301562 (1981-11-01), Durr
patent: 4541809 (1985-09-01), Schaumann
patent: 4599072 (1986-07-01), Pollini et al.
Basinger Sherman D.
Kettlestrings Donald A.
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