Portable main drain for a pool of water

A portable main drain utilizing top and bottom walls with an attached flexible conduit for the removal of debris from bodies of water, ponds or spas, which operates with suction at the cleaner suction port and/or the skimmer from the circulation pump. The bottom wall has four cork feet to support the portable main drain. A flow regulator is positioned where the flexible conduit connects to the suction port. The top wall contains an internal annular wall projecting downwardly to form a flow-regulating gap with the bottom wall to thereby divide the water flow at about 30% from the ports in the bottom wall into a manifold that is supplied with the remaining portion of water by the ports in the top wall.

CROSS-REFERENCE TO RELATED APPLICATIONS

Not applicable

BACKGROUND OF THE INVENTION

The present invention relates to a mobile fixture for strategical placement to periodical filter withdraw water with entrained impurity including debris from the bottom of a pool of water such as a water garden, fish pond, spa or a swimming pool.

A water garden, fishpond, spa or a swimming pool belong to a class of an artificially created body of water requiring systematic cleaning of debris and contaminants from the body of water. Water skimmers and hand held nets are commonly used to remove debris from the surface of the body of water but drain fixtures are needed to treat the contaminants on or near the floor of the body of water. A need exits for a portable main drain for a body of water to withdraw water both from the surface of the pool floor and from an area near and surrounding the water withdraw site at the pool floor and thereby effectively withdraw entrained impurity including debris from the bottom of the body of water.

Accordingly, it is an object of the present invention to provide a portable main drain embodying a construction and arrangement of parts for withdrawing water by each of a top wall and the bottom wall having water intake ports all communicating with the water manifold communicating with a suction line connected to a pump and a filter via a skimmer or wall mounted suction port with a spring loaded, self-closing flapper, which is a safety feature.

It is a further object of the present invention to provide a portable main drain having a water manifold communicating through a metering wall with intake ports in a bottom wall for restricting water flow to the manifold to a volume less than the volume supplied by intake ports in a top wall for imparting stability to the portable drain and avoiding entrapment with the material of the floor for the body of water.

It is another object of the present invention to provide a portable main drain having spacer support feet members to allow ease of placement repeatedly at diverse sites about the floor of a pool of water without damage to the floor wall material such as plastic or rubber liner material for the body of water.

It is another object of the present invention to provide a portable main drain to serve the function of a permanent main drain when failures occur to the drain and/or associated under ground conduit.

SUMMARY OF THE INVENTION

More particularly, according to the present invention there is provided a portable main drain for a body of water bounded by a sidewall and floor wall. The portable main drain includes a top wall interconnected with a bottom wall by a spacer wall enveloping a volume defining a water manifold. The spacer wall contains a water delivery port and each of the top wall and the bottom wall has water intake ports all communicating with the water manifold. The water intake ports in the bottom wall are dimensioned and arranged to conduct water at a sufficient flow rate for extracting debris from an area of the floor wall surrounding the bottom wall. Stand off members project from the bottom wall for spacing the water intake ports in the bottom wall above the floor wall of the body of water to impart stability to avoid entrapment of the water intake ports with the floor wall of the pool of water. A conduit joined with the outlet port conducts water of the pool of water from the water manifold for delivery externally to the sidewall.

Preferably, the metering wall extends from the top wall to form a water flow control gap with the bottom wall for establishing a reduced and sufficient flow rate of water to the water manifold for extracting debris from the floor wall of the body of water. The metering wall traverses the spacer wall for forming an internal peripheral boundary to the water manifold, such that the meter wall forms an annular water flow space of not more than 30% of the water flow space defined by the water intake ports in the top wall. Preferably, there is a control to regulate water flow from the water manifold by the conduit.

DETAILED DESCRIPTION OF THE INVENTION

The portable main drain10of the present invention is useful for operating in the body of water comprised of any one of an in ground pool of water or an above ground body of water such as a water garden, a fish pond, a spa, or a swimming pool, all of which have a body of water bounded by a sidewall or a water fountain feature and a pool wall. As shown inFIGS. 1 and 2, the portable main drain10is connected to a conduit12; preferably, a flexible hose made of plastic material and constructed in a manner, per se, well known in the art. A sleeve14of dense plastic forms a weight passed along the conduit12to a site proximate the portable drain to artificially decrease the buoyancy of the conduit when needed to hold down the portable water drain10of the present invention in the body of water16. However, the sleeve14is an option because the conduit12can embody a construction with a wall of sufficient density to cause the conduit12and the adjoined water drain10to sink in the body of water without the addition of the sleeve14.

The illustration inFIG. 1is typical of an in ground swimming pool18as well as a fish pond/water garden bounded by sidewalls20and floor wall22. In a swimming pool, the sidewalls20abut with the usual decking24and each sidewall contains one or more wall skimmers26and usually a cleaner suction port connected to a pump in a circuit with a filter, forming part of the well-known water filtration system, not shown. The filtration system applies suction to a conduit located inside the skimmer housing or the suction is applied to a wall suction port to extract floating debris with water withdraw at the surface of the pool of water. The filtration system usually includes a drain fixture, not shown, permanently installed in the floor wall22to withdraw pool water and submerged debris. The filtration system returns the filtered pool water through conduit lines connected to fillings28at spaced locations in the sidewall20of the body of water18. The portable water drain10of the present invention is particularly usefully to as a temporary or as a permanent replacement for the drain fixture permanently installed in the floor under concrete or a liner. A need for an alternative to a main drain occurs when the drain fixture or associated underground conduit is broken and cannot be repaired. Other circumstances give rise to the usefulness of the portable main drain include the use in a below ground body of water where the conduit and/or the drain fixture erode or otherwise become nonfunctional and as an alternative to replacement of the floor drainage system.

The illustration inFIG. 2is typical of an above ground swimming body of water30as well as a spa. The body of water30is bounded by sidewall32and floor wall34. The outer periphery of the sidewall32is usually reinforced by vertical bars36joined with a rail38forming the upper periphery of the body of water. The sidewall larger pools, usually a water depth of 4 feet or greater, contains one or more wall skimmers40connected to a pump in a circuit with a filter, forming part of the well known water filtration system, not shown. The filtration system applies suction to a conduit connected to each skimmer to extract floating debris with water withdraw at the surface of the pool water. The filtration system usually includes a water return port42permanently installed in the sidewall. An important feature and advantage of the portable main drain10arises out of the construction of the drain to operate on the floor of a body of water without sacrificing the integrity of the floor wall, particularly in bodies of water where a liner, usually of plastic or rubber material is use to provide a water impermeable barrier.

As shown inFIGS. 3-6, the preferred embodiment of the portable main drain10includes a top wall50interconnected with a bottom wall52by a spacer wall54enveloping a volume defining a water manifold56. The spacer wall54contains a water delivery port58. The top wall50has water intake ports60and the bottom wall52has water intake ports62. These intake ports are constructed in the form of non-hair snare anti-entrapment in the top wall and the bottom wall is an anti-entrapment cover. However, the anti-entrapment safety feature is unnecessary with respect to avoiding possible injury to persons or animals using the body of water since the portable main drain is not secured to the structure containing the body of water. All the water intake ports60and62communicate with the water manifold56. The bottom wall takes the form of a shallow bowl that includes a truncated conical bottom wall section containing apertures defining the water intake ports62each separated by rails64.

The water intake ports62in the bottom wall are dimensioned and arranged to conduct water at a sufficient flow rate for extracting debris from an area of the floor wall surrounding the bottom wall. Stand off members66preferably four feet made of cork material are provided with rod-shaped protrusions that are pressed in place and dimensioned to tightly fit in drilled opening in the bottom of the housing. The remaining thickness of the stand off members66forms projects from the bottom wall for spacing the water intake ports in the bottom wall above the floor wall of the body of water to impart stability to avoid entrapment of the water intake ports with the floor wall of the pool of water. A metering wall68extends from the top wall50to form a water flow control gap70with the bottom wall for establishing a reduced and sufficient flow rate of water to the water manifold56for extracting debris from the floor wall of the body of water. The metering wall extends from the top wall50and traverses the spacer wall54for forming a cylindrical outer peripheral boundary of the water manifold56. The water flow control gap70formed by the metering wall68forms an annular water flow space of not more than 30% of the water flow space defined by the aggregate of the water intake ports60in the top wall50. The top wall contains radial segments72separated by rectangular gaps74defining the water intake ports60.

The conduit12is joined with the outlet port58for conducting water of the pool of water from the water manifold56for delivery externally to the sidewall of the body of water, spa, fish pond or water garden. InFIG. 6there is illustrated a control76per se well known it the art to regulate water flow from the water manifold by the conduit. The control76includes an internal valve adjustable by a sleeve78for adjusting the amount of suction applied to the conduit. However, the proportional division of water flow supplied by the intake ports in the bottom wall with respect to the intake portion of the top wall is essentially unaffected by the magnitude of suction.