Lightweight Removable Cover for a Pool, Greenhouse or the Like

Flexible covers for swimming pools, greenhouses and the like have been known heretofore. Examples of such covers are shown in U.S. Pat. Nos. 3,766,573, 3,461,890, 2,953,145 and 3,683,427. The object of all of the patented structures is to provide a low-cost cover so that the user can afford to keep the pool, for example covered during inclement weather and to keep debris out of the pool. These patented covers, however, are generally not commercially satisfactory since they are expensive to manufacture and are difficult to remove during good weather and erect during inclement weather.

It is an object of this invention to provide an inexpensive, easily removable cover for a swimming pool, greenhouse or the like of the type which has a peripheral rail for securing the cover.

It is another object of this invention to provide supports for a flexible cover which are easily adaptable to a large variety of sizes and shapes.

It is another object of this invention to provide a cover for an enclosure such as a pool or a greenhouse which can be manually attached to the peripheral rail surrounding the enclosure.

Basically these objects are obtained by using a plurality of telescopically interfitted plastic or metal tubular supports which are interconnected at the top of the enclosure and connected to a peripheral rail surrounding the enclosure in a unique manner. The lower ends of the tubular supports are connected to the peripheral rail which has a flat, top wall and a vertical sidewall, by providing a peripheral tubular support with upright T sections that interfit into the lower ends of the tubular supports coming from above the enclosure. In a second embodiment the lower ends of the tubular members are fitted into peripherally spaced blocks which sit on the flat, top wall of the peripheral rail. In both embodiments the tubular peripheral support or the blocks are clamped to the vertical sidewall of the rail such that they are pressed tightly against the flat, top wall but can be removed without the need for any special tools merely by unclamping. The flexible cover is also releasibly attached to the rail between the rail vertical wall and pinching washers attached to the vertical wall. In one embodiment for exceptionally large pools, a second set of tubular supports or truss supports lie in an arcuate co-planar position below an upper set of tubular supports for additional strength. In addition, in this large embodiment, stabilizing tubular members coupled to each of the tubular supports and guy lines are provided for additional lengthwise stability. In some embodiments a ridge support terminates above the peripheral rail to form an entry way into the enclosure.

FIG. 1 is a side elevation of one preferred embodiment of an above-ground pool.

FIG. 2 is a plan of the enclosure shown in FIG. 1.

FIG. 3 is a front elevation of the enclosure shown in FIG. 1.

FIG. 4 is an isometric detail of one clamping member.

FIG. 5 is a fragmentary plan of a hub device for attaching the tubular support members of the embodiment of FIG. 1.

FIG. 5A is a side elevation of the hub device shown in FIG. 5.

FIG. 6 illustrates one form of connection for the tubular supports.

FIG. 7 is a fragmentary vertical section showing a means for clamping the flexible cover to the peripheral rail of the enclosure.

FIG. 7A is a front elevation of the clamping members shown in FIG. 7.

FIG. 8 is another embodiment showing a peripheral rail of an enclosure fastened to the ground.

FIG. 9 is a fragmentary end elevation looking at one component of a ridge support connection over the door frame of the enclosure shown in FIG. 1.

FIG. 10 is another embodiment for fastening the tubular supports to the peripheral rail of the enclosure.

FIG. 11 is a view similar to FIG. 8 but showing the clamping member of FIG. 10 for use with a peripheral rail attached to the ground.

FIG. 12 is a fragmentary vertical section of a modified form of covering support for large enclosures.

FIGS. 12A and 12B are modified hub devices for the enclosure of FIG. 12.

FIG. 13 is a modified enclosure for large pools.

FIG. 14 is a transverse fragmentary section of the enclosure of FIG. 13.

FIG. 15 is a detail for connecting tubular supports to the ground in the embodiment of FIG. 13.

FIG. 16 is a detail for attaching the peripheral rail to the ground in the device shown in FIG. 13.

An above-ground swimming pool or greenhouse cover is shown in FIGS. 1-3 and includes the conventional sidewall of a pool 10 with its conventional peripheral rail 12 having a flat, top wall 13 and a vertical sidewall 14. Tubular plastic support members 15 are interconnected by dowels 16 which are screwed or nailed to the tubular supports. The upper ends of the tubular supports are connected by dowels in a hub 17 having a plurality of tubes 18. The lower ends of the tubular supports are attached to the peripheral rail in one embodiment shown in FIG. 4 by a plurality of spaced blocks 20 each with an upstanding dowel 21 glued and screwed at an angle as shown. The blocks are pulled against the flat, top wall by sidewall clamps 22 that hook under the lower edge of the vertical sidewall and are adjustibly clamped in position by wing nuts 23. In a second embodiment shown in FIG. 4A spaced blocks 25 are coupled to the flat, top wall 13 by clamps 26 which underlie the top flat wall and abut against the vertical sidewall. Thumbscrews 27 hold the clamps 26 against the rail by abutting against the underside of the top, flat wall.

In FIGS. 10 and 11 a modified embodiment is illustrated. In this embodiment, a peripheral tubular support 30 is interconnected by T-shaped pipe members 31 in which is fitted a short piece of pipe 32 and a dowel 21. The dowel 21 fits in the lower ends of the tubular supports 15. The peripheral tubular support 30 is pressed against the flat, top wall 13 by clamps 34. The clamps 34 include a lower clamping piece 35 that is slid up tightly against the lower edge of the vertical sidewall 14 and wing nuts 36 hold the lower clamping member in place.

In FIG. 8 the rail 12 is secured directly to the ground by posts or pegs 40. Thus the same tubular support fastening means is usable for below ground pools or enclosures as is used for the above-ground pools.

FIGS. 12A and 12B illustrate modified hubs. FIG. 12 illustrates a hub 42 which is used at the ends of an oval pool. Hub 43 is used in the center of an oval pool. Such an oval pool is shown in FIG. 12.

The covering 50 for the pool is of a heavy-duty vinyl plastic which is fitted snugly over the tubular supports and coupled at its lower, peripheral edge to the peripheral rail 12. For this purpose a set of washers 45 and 46 (FIGS. 7 and 7A) are connected against the lower edge of the sidewall 14 by wing nuts 47. Washer 46 is bent so that as the washers are pulled together by the wing nut, the vinyl covering 50 is pinched between the washer 45 and the vertical sidewall 14.

In each of the above-ground pools an entrance way 54 (FIGS. 1-3) is provided. The entrance way is formed from an elongated ridge support 55 which terminates at a substantial distance above the peripheral rail 12. Two support members 56 and 57 connect to the blocks 20 (or tubular peripheral member 30) and converge upwardly to connect with the ridge support 55. For this purpose a connector 60 (FIG. 9) having two hollow legs 62 and a short dowel 63 interfit respectively over the tubular members 56 and 57 and within the tubular support 55. All of these members can be screwed or nailed together as needed.

As best shown in FIGS. 12 to 16 modified forms of support for enlarged enclosures are illustrated. In these embodiments a hub such as shown in FIG. 12 connects tubular supports 70 at the curved ends of the pool and additional hubs as in FIG. 12B connect tubular supports 70 along the length of the enclosure. The tubular supports are of the same material as in the other embodiments but are coupled together by T sections 31 (FIG. 14) joined by a common dowel which fits into pipes 32 making up the T. A second set of smaller supports 71 connected to the other T sections lie in a common plane and in a smaller arc than the supports 70 to form a truss for increased strength. In the preferred embodiment the truss or smaller tubular supports are used with alternate tubular supports 70 along the length of the part. The tubular supports 70 fit at their lower ends over plastic dowels 75 which are fitted within a wooden or tubular peripheral rail 76. The inner supports 71 fit over dowels 77 which are also embedded in the peripheral rail. Bolts 78 interconnect the inner supports 71, dowels and outer supports 70. The vinyl cover 80 is fastened to the wooden rail by screws 82 and washers 84. The peripheral rail is secured to the ground or concrete by bolts 90 which fit in enlarged nuts 91 that are cemented or tamped into place in the concrete or attached to the ground by stakes as in FIG. 8. Access to the cover is achieved through a zipper opening or door not shown. The supports and trusses are further stabilized by elongated tubular members 92 that are bolted to each of the tubular supports 71. The tubular supports 92 provide stabilization against movement of the tubular support members. Additionally, a set of guy wires 94 start from the top hub 42 and are connected to the peripheral rail 76 by screws not shown. Second guy wires 98 start at the ridge pole 99 which runs the length of the pool at the upper end thereof and then connects to the peripheral rail 76 at the opposite end of the pool. The stabilizing guy wires also assist in providing lengthwise stability to the enclosure.