Patent ID: 8516625

Claim:
A spa tub cover for a portable spa tub that contains water, said spa tub cover for use with a cover lifter having a frame, said cover comprising: a) a first portion including a heat insulative interior surrounded by an at least water resistant covering, said first portion having a first lower surface that faces water in the spa tub, an opposed first upper surface, a first inner surface, and a first outer surface, said first lower surface defining a first width and a first length transverse to said first width; b) a second portion including a heat insulative interior surrounded by an at least water resistant covering, said second portion having a second lower surface that faces the water, an opposed second upper surface, a second inner surface, and a second outer surface opposite said second inner surface, said second lower surface defining a second width and a second length transverse to said second width; c) a hinge at said lower surfaces of said first and second portions, said hinge having a hinge axis extending parallel to said first and second widths, said first and second portions movable about said hinge axis, wherein said first and second widths are the same, said first length is greater than said second length, and said spa tub cover having a flat configuration in which said first and second lower surfaces are co-planar and said first and second inner surfaces face on another, and a folded configuration in which said first and second inner surfaces are rotated about said hinge and said first and second lower surfaces face one another; and d) a debris shield provided at the first and second upper surfaces to cover said hinge when said first and second portions are in said folded configuration.