Life ring

Life ring, comprising:

• a. main body of ring-like configuration with a cross-section in the shape of a closed plane figure, formed of flotation material, and having a circular central aperture, the outer periphery of the main body being in the shape of a multi-sided figure having corners in which the sides are of equal length, each of the sides being in the form of the arc of a circle whose radius of curvature is substantially larger than the radius of the aperture, the cross-sectional shape of the main body being generally triangular with rounded corners, one side defining a bottom plane surface, a second side defining a central aperture in the main body, the said bottom plane surface being perpendicular to the axis of the central aperture,
• b. a circular rigid secondary ring located externally of the main body and generally in the said bottom plane surface, and
• c. means joining the outer periphery of the main body to the secondary ring at the said corners.