Recreational flotation device

Details Recreational flotation device Recreational flotation device

2011-04-19

2011-04-19

Swinehart, Ed (Department: 3617)

Buoys, rafts, and aquatic devices

Body supporting buoyant device

Reexamination Certificate

active

07927163

ABSTRACT:
A flotation recreational device consists of a buoyant vessel having a semispherical exterior surface and a sufficient internal area adapted to accommodate an operator. The vessel is configured to have a geometrical center which is a metacenter of a spherical buoyant body serving as a base of the partially-spherical exterior surface. The center of sphere is spaced from and located above the center of gravity of the operator, so the radius of sphere is greater than the height of said center of gravity. The stability of a vessel-operator system is determined by a stability of a distance between the metacenter and the center of gravity of the operator. The vessel can be in the form of a circular shell, an elliptical shell, or a barrel.

REFERENCES:
patent: 2938727 (1960-05-01), Nosak
patent: 3664290 (1972-05-01), Finn
patent: 2581960 (1986-11-01), None

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