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US 3,940,809 AGranted
Swimming pool cover
AssigneeThe Raymond Lee Organization, Inc.
InventorGeorge A. Hughes
Life of this patent
Estimating the term…
Abstract
A hollow air filled flexible horizontal endless plastic waterproof loop floats on top of the water in a swimming pool and is shaped to conform with and bear continuously against the inner periphery of the pool. The loop has an open central region. A thin flat flexible horizontal plastic waterproof sheet is disposed in the region to close same and is sealed at its periphery to the loop.
Claims3
In combination with a swimming pool containing water to a preselected level and having an inner periphery:
- A hollow air filled flexible waterproof endless loop shaped to conform to said periphery and floating on top of the water, the loop having an open central region and bearing continuously against the periphery, said loop in vertical cross section defining a circle and having a peripheral opening closed by a removable plug whereby the loop can be inflated for use and deflated for storage;
- and
- a thin flat flexible horizontal dark colored plastic waterproof sheet closing said region and sealed at its periphery to said loop, said sheet being adapted to float in water.
Dependencies are inferred from the claim text.