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US 4,936,804 AGranted
Non-inflatable buoyancy aid
OwnerM. Richard Dowdeswellinventor
Life of this patent
Estimating the term…
Abstract
A non-inflatable buoyancy aid is described comprising an annular structure of closed cell plastic foam which is held in position about a wearer's arms and legs through positive displacement and material friction. The buoyancy aid maintains the wearer in either a horizontal or vertical position at water level, depending upon the positioning of the aid about the limbs.
Claims5
A non-inflatable buoyancy aid comprising:
- an annular structure of closed cell plastic foam for placement on the arm of a wearer;
- an annular structure of closed cell plastic foam for placement on the leg of a wearer;
- each said annular structure having an inside cylindrical wall and an outside cylindrical wall parallel to said inside cylindrical wall and displaced therefrom about a radius of said annular structure, said inside cylindrical wall and said outside cylindrical wall connected by transverse end walls at either end of thereof;
- said transverse end walls being substantially perpendicular to said inside cylindrical wall and said outside cylindrical wall;
- said buoyancy aid capable of supporting a wearer by placement on the wearer's arm and leg through displacement of an aqueous substance and frictional engagement with wearer;
- said annular structure placed on the arm of a wearer of a size enabling it to be nested within said annular structure placed on the leg of a wearer.
3 more elements
Dependencies are inferred from the claim text.