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

Abstract: System and method for monitoring a working status of a swimming pool cover assembly. The system comprises a pool cover assembly operably connected to an alarm apparatus; both may be operably connected to a plurality of sensors capable of detecting a working status of the pool cover assembly and sending a signal to the alarm apparatus. The alarm apparatus continually produces at least one humanly perceptible indication corresponding to a working status of the pool cover assembly. The alarm apparatus includes at least one alarm-producing device, such as an audio or visual device, or combination of the two, a receiver operably connected to the plurality of sensors for receiving the signals, a processor operably coupled with the receiver for processing and recognizing the received signals, and software operably coupled with the processor enabling the alarm-producing device to produce the humanly perceptible indication corresponding to the recognized signal.