US20100218756A1 - Heat retaining cover for swimming pools - Google Patents

Abstract

A heat retaining cover and a method for retaining heat in swimming pools is provided. In one embodiment, the cover includes a plurality of interlocking floatation panels, at least one pair of hinges attached to one edge of each adjacent interlocking floatation panel, a second pair of hinges attached to the opposite edge of of the reverse face of each adjacent interlocking floatation panel, a second hinge having an aperture formed therein, the second edge attached to attached to one edge of each adjacent interlocking floatation panel, and a length of flexible material threaded through the aperture of each second hinge, thereby to allow the plurality of interlocked plurality of interlocking floatation panels to be extended and retracted.

Description

CROSS REFERENCE TO RELATED APPLICATIONS
• The present application relates to and claims priority to a provisional application entitled “A Protective Covering for Swimming Pools” filed Feb. 27, 2009 and assigned Ser. No. 61/202,439 describing and illustrating a related invention made by the present inventor.
FIELD OF THE INVENTION
• The present invention relates to a heat retaining cover for swimming pools and the like.
BACKGROUND OF THE INVENTION
• The temperature of the water in an outdoor swimming pool can drop significantly during the night after the sun sets. Heat is generally lost by conduction from the pool water surface into the surrounding atmosphere. If the pool requires to be heated, during cooler days, the cost of reheating may be substantial. In order to retain heat, pool covers, which float on the pool water and cover the surface of the pool water may be used to reduce the amount of heat transferred from the surface of the pool water to the atmosphere. Since the cover is floatable on the pool water, the cover can be easily removed during the day when required for swimming purposes, and replaced on the pool water after swimming or in the evenings for heat retention purposes.
• A common type of floatable pool cover generally consists of two plastic layers separated by air pockets. The air pockets in the cover provide floatability to the cover and insulation to reduce the amount of heat transferred by conduction from the pool water to the atmosphere, especially during the dark or night hours. However, the insulation properties of the pool are very poor and these pool covers do not prevent the majority of the heat radiation from the pool dissipating during the night.
• Generally, these prior art covers attempt to achieve two conflicting aims, namely allowing sunlight to pass through during the day and heat the water while also preventing heat from escaping during the day. For example, U.S. Pat. Nos. 6,286,155; 6,317,902 and 6,637,046, disclose floatable pool covers where an upper layer of the cover has a dark color and a lower layer has a light reflective material applied to one of the surfaces thereof. This type of cover is a compromise and thus is not especially efficient in achieving either of its aims.
• A further disadvantage of plastic type covers is their size and bulkiness which makes handling extremely difficult. The covers need to consist of a single unit to be effective and thus are heavy especially covers for standard and larger swimming pools. To cover and uncover a pool is time consuming and generally requires a great deal of manpower.
• It would, thus be an advantage to provide a heat retaining pool cover which is relatively light and easy to handle while efficiently retaining the majority of the heat.
BRIEF DESCRIPTION OF THE DRAWINGS
• The present invention will be understood and appreciated more fully from the following description taken in conjunction with the appended drawings in which:
• FIG. 1 is a schematic isometric view of a protective heat retaining cover, constructed and operative in accordance an embodiment of the invention;
• FIG. 2 is a schematic view of the heat retaining cover ofFIG. 1 stacked together for storage purposes;
• FIG. 3 is a schematic view of the floatation panels ofFIG. 1, partially stacked and partially unpacked;
• FIG. 4 is a top view of a swimming pool covered by sets of covers ofFIG. 1; and
• FIG. 5 is a schematic view of a protective heat retaining cover, constructed and operative in accordance a further embodiment of the invention.
DESCRIPTION OF THE INVENTION
• This present invention relates to a protective heat retaining cover suitable for any size of swimming pool, tub and spas, for example.
• Reference is now made toFIG. 1 which is a schematic illustration of a protective heat retaining cover, generally designated10, constructed and operative in accordance an embodiment of the invention.
• Thecover10 comprises a plurality offloatation panels12 which may be interlinked or connected together to create covers of different sizes. Thefloatation panels12 may be formed from any suitable material which floats on water and which is preferably light in weight, such as polystyrene and polyethylene or a moldable copolymer comprising a mixture of polystyrene and polyethylene, for example. An exemplary floatation panel, suitable for swimming pools may be rectangular in shape, having dimensions of 1.9 m×1.25 m and a thickness of 2-3 cm.
• In an embodiment of the invention, the plurality offloatation panels12 may be connected together by means of a pair ofhinges14 connecting each consecutive pair offloatation panels12, as shown inFIG. 1. Thehinges14 are attached to thefloatation panels12 on alternative faces of each consecutive pair so that a set offloatation panels12 may be stacked in a ‘concertina’ fashion, as shown inFIG. 2. Thus, the reverse side of the hinges, indicated byscrews15 is visible on alternative faces of each consecutive pair offloatation panels12.
• Thefloatation panels12 may be configured to any size to suit the pool being covered. For example, in an embodiment of the invention, a cover suitable for a standard swimming pool, having dimensions of 25 m long×11 m wide approximately may be constructed from six sets of twenty floatation panels. Thus, each set of twenty floatation panels would cover aswimming lane18, which is approximately 1.9 m wide. Each set of twenty floatation panels may be placed alongside a second set without the need of tying each set to each other.
• As shown inFIG. 4, theflotation devices12 may be configured to fit any size and shape ofpool20. Non-rectangular shapes, including circular pool, for example, may be easily accommodated by cutting and shaping the flotation devices accordingly.
• Eachfloatation panel12 further comprises anaperture16 formed adjacent one of the longitudinal edges. A cord18 (or any a length of flexible material) is threaded through theapertures16, as shown. Thus, as best seen inFIG. 3, thefloatation panels12 may be pulled together by pulling on thecord18. For stacking purposes, thecord18 may be suitably fastened. Conversely, by unfastening thecord18, the set offloatation panels12 may be controllably released to cover a section of the pool, as required.
• It will be appreciated by persons knowledgeable in the art that the number of apertures and their size may be altered to suit the cover and the number and type of hinges may be varied, without deviating from the invention. Thus, for example, a pair of flotation devices may be connected together by spiral connectors, known in the art.
• Thecover10 is easy to handle and relatively strong. In the example above, a set of 20 flotation devices linked together would weigh approximately 30 kg. Thus the pool could to be covered (and uncovered) manually and quickly without the need for any specialized machinery. Alternatively, the set of flotation devices may be folded and unfolded by winding the cord around a spool, for example. The spool may be turned manually or by any suitable mechanical device, known in the art.
• When not in use, each set of interlinked flotation devices may be stacked, making for compact storage, as shown inFIG. 2.
• Reference is now made toFIG. 5, which is a schematic illustration of a protective heat retaining cover, generally designated50, constructed and operative in accordance an embodiment of the invention.Cover50 is similar to protectiveheat retaining cover10. Similar elements are similarly numbered.
• Thecover50 comprises a plurality offloatation panels12 which may be interlinked or connected together to create covers of different sizes. Thefloatation panels12 may be formed from any suitable material which floats on water and which is preferably light in weight, such as polystyrene and polyurethane, for example. The plurality offloatation panels12 may be connected together by means of a pair ofhinges14 connecting each consecutive pair offloatation panels12, as shown inFIG. 6. Thehinges14 are attached to thefloatation panels12 on alternative faces of each consecutive pair so that a set offloatation panels12 may be stacked in a ‘concertina’ fashion, as shown inFIG. 2. The reverse side of the hinges, indicated byscrews15 is visible on alternative faces of each consecutive pair offloatation panels12.
• Eachfloatation panel12 further comprises asecond hinge30 having anaperture32 formed therein. Thesecond hinge30 may be placed in between the pair ofhinges14 or alternatively on the opposite longitudinal edge. A cord34 is threaded through theaperture32 of thehinges30, as shown. Thecover50 may be folded together and stacked as described with reference to cover10 hereinabove.
• It will be appreciated that the present invention is not limited by what has been described hereinabove and that numerous modifications, all of which fall within the scope of the present invention, exist. Rather the scope of the invention is defined by the claims, which follow:

Claims (8)

1. A heat retaining cover for swimming pools comprising:

a plurality of interlocking floatation panels;

at least one pair of hinges attached to one edge of each adjacent interlocking floatation panel;

at least one pair of hinges attached to the opposite edge of of the reverse face of each adjacent interlocking floatation panel;

at least one aperture formed in each of said plurality of interlocking floatation panels; and

a length of flexible material threaded through each of said apertures, thereby to allow the plurality of interlocked plurality of interlocking floatation panels to be extended and retracted.

2. The heat retaining cover ofclaim 1, further comprising a second hinge having a second aperture formed therein, wherein said length of flexible material is threaded through each of said second apertures.

3. The heat retaining cover ofclaim 1, wherein each panel is a material selected from the group consisting of polystyrene, polyethylene, and a mixture of polystyrene and polyethylene.

4. The heat retaining cover ofclaim 1, wherein plurality of interlocking floatation panels are shaped to accommodate the contours of the pool being covered.

5. A heat retaining cover for swimming pools comprising:

a plurality of interlocking floatation panels;

at least one pair of hinges attached to one edge of each adjacent interlocking floatation panel;

at least one pair of hinges attached to the opposite edge of of the reverse face of each adjacent interlocking floatation panel;

a second hinge having an aperture formed therein, said second edge attached to attached to one edge of each adjacent interlocking floatation panel; and

a length of flexible material threaded through the aperture of each second hinge, thereby to allow the plurality of interlocked plurality of interlocking floatation panels to be extended and retracted.

6. The heat retaining cover ofclaim 5, wherein each panel is a material selected from the group consisting of polystyrene, polyethylene, and a mixture of polystyrene and polyethylene.

7. The heat retaining cover ofclaim 5, wherein plurality of interlocking floatation panels are shaped to accommodate the contours of the pool being covered.

8. A method for retaining heat in swimming pools comprising:

interlocking a plurality of floatation panels, each of said plurality of interlocking floatation panels having at least one aperture formed therein; and

threading a length of flexible material through each of said apertures, thereby to allow the plurality of interlocked plurality of interlocking floatation panels to be extended and retracted;

wherein each adjacent interlocking floatation panel having at least one pair of hinges attached to one edge thereof; and

wherein the reverse face of each adjacent interlocking floatation panel having at least one pair of hinges attached to the opposite edge thereof.

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