Patent ID: 8099804

Claim:
A thermal insulating pool blanket comprising: polygonal float devices including respective parametrical rims symmetrical about respective central axes, formed with a plurality of horizontally elongated, laterally outwardly facing vertical facets of equal length, adjacent facets joining at respective corners to define a predetermined number of corners, a predetermined number of spokes radiating outwardly from the respective axes to join the corners at their respective distal ends, adjacent spokes cooperating with the respective rims to form therebetween respective axially elongated tubes defining respective axially opposite ends, the spokes being formed with axial opposite edges defining respective ramps sloping symmetrically outwardly from the axes and axially toward one another to fare into the respective rims at the respective corners, the float devices including at alternating opposite ends of the tubes transverse webs spanning between the respective adjacent ribs and the respective rims to cooperate in defining air cells open at the respective ends of the tubes opposite the respective opposite ends whereby the floats may be dispersed onto a surface of a pool with their respective opposite axial sides randomly facing downwardly causing the open ends at the alternating opposite ends to capture air in the respective alternate ones of the respective air chambers.