Abstract: A roller apparatus for winding and unwinding a pool cover is provided which comprises a telescoping roller section which can be adjusted in length, wheel or pedestal supports to support the roller above a pool edge, axle members connecting the roller to the wheel or pedestal supports, the latter containing ball bearings to permit axle rotation and means, such as a crank or motor, connected to one of the axle members for rotating the roller to collect the pool cover, the latter being connected to the roller. Once the pool cover is taken up, the apparatus can be rolled on its wheels, or carried where pedestal supports are used, to a storage area.

Abstract: A cover for a swimming pool is disclosed comprising first and second layers of plastics material joined together at join zones, to define a plurality of spaces therebetween the spaces being inflated or inflatable, whereby the cover floats when placed on the surface of a pool with the second layer lowermost, at least the second layer being distended away from the join zones and having downwardly projecting crests which in use contact the surface of the pool and the join zones are located above the surface of the pool and wherein drainage holes are formed through the first and second layers at the join zones to provide fluid communication paths from the upper side of the cover to the air space defined between adjacent crests in the second layer and the surface of the pool whereby rainwater drains effectively into the air spaces so defined and then into the pool.

Abstract: An assembly for covering a swimming pool when it is not in use. A roll member is rotatably mounted at one end of the pool for rolling up and unrolling a sheet of material of dimensions for covering the pool. A scissor type extension device moves the outer end of the sheet toward the other side of the pool when unwinding. The scissor device is moved between the retracted and extended positions by a rotating screw. An electrical motor rotates the screw and the roll member. A slide track mechanism submerges the entire assembly when rolled up.