Drain cover for generally open flat drainage areas with debris blockage and open drainage portions

Abstract

A drain cover having a main drainage surface with relatively larger apertures or openings therein, comprising generally 50 percent of the surface, so that larger debris is accepted into a related drain pipe when a depending skirt portion of the drain cover, having smaller perforations, becomes clogged. In this way a two-layer drainage system for a generally flat surface is provided that allows draining of water and small particulates alone when possible, but upon the clogging of the smaller openings the generally flat surface can be protected from flooding by allowing larger particulates to drain into the main drainage surface. The main drainage surface is held above the flat surface by the depending skirt, at a level of 3 / 8 to 1 inch above the flat surface. When the depending skirt openings are clogged the water and debris will rise until allowed to drain into the larger openings of the main drainage surface.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]The present application is a continuation of U.S. patent application Ser. No. 13 / 614,043; filed on Sep. 13, 2012, and now pending, the full disclosures of which is incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention concerns a drain cover for use on drainage pipes that are within generally open flat surfaces prone to flooding. More particularly the present invention concerns a drain cover having a generally flat surface, open to a drainage pipe and a skirt depending from the flat surface for drainage of water even in the presence of debris that otherwise would block the drain. The skirt and flat surface portions of the drain cover each overlying the surface to be drained in a manner that permits drainage while preventing flooding due to the blockage of drain holes. The device in a preferred embodiment is used outside of a walk-out basement or another entry door that is close to or, below grade and as such i...

AI Technical Summary

Benefits of technology

The device described in this patent has an open top, with a strong, lightweight "X" shaped structure that allows the largest amount of water to flow through while still giving support to objects placed on top of it. This design also prevents larger objects from blocking or damaging the drain. Overall, the device is strong, light, and can handle significant amounts of water flow, making it useful in a variety of situations.

Problems solved by technology

For example, on road surfaces, the presence of water can result in dangerous hydroplaning and other flooding conditions causing safety hazards.

However, these types of drains are only possible against curbs as the skirt portion is typically quite elevated (so as to be effective only during periods of high water) and would prove a high obstacle on a flat surface.

Each of these shows variable sized openings but are of a type that can only be used in the side of the curb on a roadway, due to their large size and shape and which could not be adopted for flat surface use.

However, in areas of generally open flat areas, such as patios and driveways that are in proximity to a house or other structure, the use of drains that have small holes or slots so as to permit drainage of water alone, often cause flooding situations when the small holes or slots become blocked by debris.

This flooding has deleterious effects on the nearby house or structure and / or other property, causing damages that are often measured in the thousands of dollars.

For example, U.S. Patent Application Publication No. 2005 / 0247612, Glassheim, Silt and Debris Filtering System for Storm Drains, tries to solve the problem by capturing the large debris within a drain, but there is a requirement for the user to occasionally come and clear out the debris trap, and in the interim flooding can occur.

U.S. Pat. No. 6,793,811, Fleischmann, Runoff Drain Filter with Separately Removable Cartridges, shows a more modern approach to run off filters, but suffers the same issues and is also not appropriate to flat surface drainage.

However, the '913 and '948 patents suffer the problem that when debris is brought towards the drain, with the natural flow of water, these drains will likely be clogged allowing the surface to flood.

The height of the devices claimed and shown in these patents makes them unsuitable for flat surfaces where pedestrians will walk or vehicles will traverse, as the devices will prove an impediment to safe travel.

Further, the designs have a similar flaw in that they are raised above the surface such that the use of such drains on flat dry surfaces would prove a hazard to travel; their placement in a swimming pool, particularly in the deep end, causes no such hazard.

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