Patent ID: 8104109

Claim:
A movable floor system for a swimming pool, the movable floor system comprising: a frame installable in a cavity acting as the swimming pool, the frame comprising: a plurality of outer lateral edges, the plurality of outer lateral edges including at least a first side and a second side, the second side located substantially opposite from the first side, the frame forming a layer configured to support a finished covering; and a plurality of crossmembers, a first end of each crossmember attached to the first side of the frame, and a second end of each crossmember attached to the second side of the frame; and a lifting mechanism comprising: a driver mounted inside the frame; a shaft having a first end attached to the first side of the frame and a second end attached to the second side of the frame; a first drive pulley situated at the first end of the shaft, and a second drive pulley situated at the second end of the shaft, the first and second drive pulleys designed to accommodate platform driving cables; an attachment to secure at least four cables in the cavity; and a plurality of carrier pulleys disposed on the first side and the second side between crossmembers of the frame; wherein the drive pulleys engage with the at least four cables, and the at least four cables further engage with the carrier pulleys.