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: Systems and methods for covering a manmade pool (10) are disclosed. The system comprises an insulating cover (12) and a roller (14) positioned along at least one edge of the pool (10), wherein the roller is attached to at least one edge of the insulating cover (12) and the insulating cover is capable of being wound upon the roller (14). In an embodiment, the system further comprises a guide (18) capable of guiding at least one leading edge of the insulating cover (20) across the pool (10), such that the insulating cover can be moved from an open position, with the insulating cover wound around the roller (14), to a closed position, with the insulating cover secured over the pool. In some embodiments, the insulating cover (12) further comprises reinforcing material that adds sufficient strength to the cover that when in the closed position over the pool, the cover can support the weight of at least one adult human.