Self-rolling swimming pool cover

摘要

The specification of the present application discloses a self-rolling swimming pool cover which extends when connected to a pressure source and returns to a rolled position when disconnected therefrom. The cover comprises a cover member, collapsible conduit means extending in one direction of the cover member and coil spring means extending in the same general direction as the conduit means. When a fluid pressure source is connected to the conduit means, it expands and in so doing, causes the cover to unroll from its compact state. When the pressure source is disconnected the conduit means is allowed to vent and collapse as the coil springs urge the cover to its rolled state. The cover will operate on the fluid pressure readily available from the discharge side of a circulating pump with the vented water being discharged from the rolling of the cover merely entering the pool. Therefore according to the present invention, a convenient swimming pool cover is achieved which can easily be extended or rolled within a pool.