Patent ID: 7752685

Claim:
A spa cover lift device for foldable spa covers on a spa with a front, a back and opposite sides comprising: an automated lift system in combination with a foldable spa cover having: a pair of lift arms positionable on opposite sides of the spa wherein each arm has a first end pivotally connectable to the spa and a second end engageable with the foldable spa cover wherein, on pivot of the lift arms connected to the spa when the cover is folded, the folded cover is lifted from the spa to the back of the spa; and, a motorized actuator assembly connected to at least one of the lift arms and connectable to the spa whereon actuation of the motorized actuator assembly when the actuator assembly is connected to the spa, the lift arm is displaced for raising or lowering the folded cover, wherein the thermally efficient foldable spa cover has a top, a bottom, a width and a thickness and comprises: a thick insulating cover piece in two half segments wherein the half segments of the cover piece are covered with a water-impervious casing and are interconnected by a hinge across the entire width of the cover that is constructed to pull the half segments together wherein the encased half segments each have a center edge that is inclined across the thickness forming a bevel wherein the inclined center edge of one half segment contacts and abuts the inclined center edge of the other half segment in a complimentary manner across the width of the cover by action of the hinge when the cover piece is lying flat with abutting inclined center edges oriented at an angle from the vertical wherein the space between the half segments is minimized or eliminated for thermal efficiency.