Abstract: A drive arrangement for moving a pool cover between an extended position and a retracted position. The drive arrangement includes a tube, at least one reel, a first motor and a second motor. The tube has a first end, a second end and an internal opening with an inside diameter. The at least one reel is configured for winding of a pair of lines. The first motor is positioned at least partially within the internal opening of the tube. The first motor engages the inside diameter of the tube and is configured to retract the cover. A second motor positioned at least partially within the internal opening of the tube. The second motor engages the at least one reel, and is configured to retract the pair of lines.

Abstract: A cover assembly for covering a container of liquid includes: a drive shaft including a drive pin; an engagement device configured for moving axially on the drive shaft when the drive pin engages the engagement device, the engagement device including at least one first engagement mechanism; and a first engagement hub rotatably mounted to the drive shaft and configured for being driven by the engagement device, the first engagement hub including at least one second engagement mechanism which includes at least one magnet configured for pulling the at least one first engagement mechanism and thereby for facilitating an engagement of the at least one first engagement mechanism with said at least one second engagement mechanism.

Abstract: A cover assembly for covering a container of liquid includes: a drive shaft including a drive pin; an engagement device configured for moving axially on the drive shaft when the drive pin engages the engagement device, the engagement device including at least one first engagement mechanism; and a first engagement hub rotatably mounted to the drive shaft and configured for being driven by the engagement device, the first engagement hub including at least one second engagement mechanism which includes at least one magnet configured for pulling the at least one first engagement mechanism and thereby for facilitating an engagement of the at least one first engagement mechanism with said at least one second engagement mechanism.

Abstract: The present invention involves a pool system including ventilation for offending gases from the pool.

Abstract: A pool cover assembly for covering a swimming pool includes a cover, a pool cover box, and a reel positionable within the pool cover box and configured for carrying the cover. The reel includes a tube and an end piece. The tube includes an end with at least one keying feature and the end piece includes at least one mating keying feature. The keying feature and the mating keying feature coact to allow relative axial movement between the tube and the end piece, but not allow relative rotational movement between the tube and the end piece.

Abstract: The present invention involves a pool system including ventilation for offending gases from the pool.

Abstract: The present invention provides a universal track and coping assembly for use with different commercially available swimming pool covers. The universal track and coping assembly includes a coping body defining a slot for receiving a reversible track for retaining side edges of a pool cover, and a reversible track insertable within the slot in two orientations. In a first orientation, the reversible track can receive a traditional construction of commercially available pool covers, and in a second orientation, the reversible track can receive other constructions of pool covers. The universal track and coping assembly may include a pulley which may reside in a pulley housing. The pulley housing may define a passageway having an opening for easily releasing the pulley from the housing.