Patent ID: 7686551

Claim:
A anchor device comprising a bolted backing plate and mounting flange cooperating to sandwich a mounting surface between said backing plate and said mounting flange, and further comprising: a retaining cup that fits into a cutout in said backing plate, said retaining cup having a floor and side walls with top edges and a plurality of attachment flanges radially spaced around said top edges, wherein said attachment flanges securely hold said retaining cup in a fixed position when mounted with said attachment flanges between said backing plate and said mounting surface; a ring clamp disposed in said retaining cup, said ring clamp having a top flat portion and a descending tip, said ring clamp also having a plurality of legs, said legs extending into said retaining cup, wherein said ring clamp is free to rotate in said retaining cup, said ring clamp being maintained in said retaining cup by said mounting flange; an anchor ring disposed around said ring clamp wherein the anchor ring passes under the top flat portion of said ring clamp and is held in place above said plurality of legs by the descending tip of said ring clamp, said anchor ring being free to move in said ring clamp and free to rotate with said ring clamp.