STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH

[0001 ] This invention was made without federal funding.

BACKGROUND OF THE INVENTION

[0002] All existing outdoor ground and floor drains (collectively referred to throughout this disclosure as“outdoor drains”) such as those installed outside of walkout basements or within low-lying landscape areas have perforated or slotted top drain covers, which purport to allow the passage of water into the drain while preventing the passage of debris that can clog the drain or connected pipes. Unfortunately, these drain covers quickly clog with debris such as grass clippings, leaves, mud and twigs, rendering them ineffective. Owners of properties with walkout basements or similar exterior floor drain areas, or landscape drainage systems incorporating similar components, must expend time and effort to keep the drain covers clean and free of debris or the outdoor drains will become obstructed and fail to drain quickly after the start of a rain event. Rain water then fills walkout basement stairwells or other areas surrounding the obstructed drain cover, eventually allowing water to flow into the basement or flood the otherwise surrounding area, as the case may be. This outcome defeats the purpose of outdoor drains and can cause significant property damage if not timely remediated.

[0003] Outdoor drains are installed in locations where standing water is not desirable. Yet for the reasons recited above, outdoor drains require continuous maintenance to remain operational. Current approaches to keeping outdoor drain covers unobstructed include laying netting, mesh or screen materials directly on top of the drain cover, which actually causes more rapid clogging. Advances over these techniques include replacing a standard flat drain cover with a conical or substantially cylindrical mesh or screen, which clogs less rapidly but ultimately becomes completely clogged nevertheless. Basement door thresholds are almost always lower than the height of these conical or cylindrical filters, which when clogged to threshold height, ultimately allow water into the adjacent basement. For this and the other reasons recited above, there exists a long felt need for a solution that is effective at substantially reducing the amount of maintenance required to keep outdoor drains unobstructed and prevent flooding of their surrounding areas.

BRIEF SUMMARY OF THE INVENTION

[0004] The invention of the present disclosure is that of an outdoor drain filter (“ODF”) that increases the open surface area of outdoor drain covers manifold, significantly increasing the amount of time for the drain cover to become completely obstructed and cause the drain to fail. The invention further comprises a means for establishing a maximum water level (referred to throughout the present disclosure as a“diverter”) so that once the filtration means of an ODF of the present disclosure are completely clogged, a diverter is provided that allows water to flow directly through the diverter into the unobstructed outdoor drain, thereby providing an additional safeguard against undesirable flooding.

BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 shows a top isometric view of an embodiment of an ODF 100 of the present disclosure, comprising a side filtration means 101 which completely surrounds the perimeter of the outdoor drain cover (not shown), a frame 102 establishing the horizontal size and shape of the side filtration means 101, and an upper filtration means 103 for allowing water to flow vertically through the ODF and into the unobstructed outdoor drain (not shown). An optional spring-loaded thumb-turn 104 is shown in this embodiment for holding the ODF in place over the outdoor drain by locking into the underlying drain cover. The ODF 100 further comprises a diverter 200 comprising an air vent 201 configured as a pipe 202 protruding upward from at least one lateral pipe 203 preferably spanning the ODF in at least one dimension and at least one open-ended, downwardly protruding elbow (“downward elbow”) 204, open-ended and situated at a desired maximum water level from the bottom of the ODF, the maximum water level 205 being defined by the height of the inner surface of the at least one lateral pipe 203.

[0006] Figure 2 shows a side view of an embodiment of an ODF 100 of the present disclosure, further comprising a diverter 200 comprising an air vent 201 configured as a pipe 202 protruding upward from at least one lateral pipe 203 preferably spanning the ODF in at least one dimension and at least one downward elbow 204, the lower inner surface of the at least one lateral pipe 203 defining a maximum water level 205 from the bottom of the ODF. This embodiment further comprises an optional bracket 206 for receiving a weight to help hold the ODF in a stationary position.

[0007] Figure 3 shows a front view of an embodiment of an ODF 100 of the present disclosure, further comprising a diverter 200 comprising an air vent 201 configured as a pipe 202 protruding upward from the at least one lateral pipe 203, preferably spanning the ODF in at least one dimension and at least one downward elbow 204 - the lower inner surface of the at least one lateral pipe 203 defining a maximum water level 205 from the bottom of the ODF - and a bracket 206 for receiving a weight.

[0008] Figure 4 shows a rear cross-sectional view of an embodiment of an ODF 100 of the present disclosure, comprising a side filtration means 101, a frame 102, and an upper filtration means 103 and an optional spring-loaded thumb turn 104 including a hook 401 capable of engaging a drain grate 402 of an existing drain 403. [0009] Figure 5 shows a top view of an embodiment of an ODF 100 of the present disclosure, comprising a frame 102, an upper filtration means 103 and an optional spring-loaded thumb turn 104.

[0010] Figure 6 shows a bottom view of an embodiment of an ODF 100 of the present disclosure, comprising a side filtration means 101 consisting essentially of side filtration members 601 and interstitial spaces 602 arranged beneath a top filtration means 103 with a diverter 200 configured with at least one lateral pipe 203 with downward elbows 204. In this embodiment, the diverter 200 is configured such that water drawn into the at least one lateral pipe 203 flows into the outdoor drain by way of a downspout 603 extending downward from the at least one lateral pipe 203 into the open drain.

DETAILED DESCRIPTION OF THE INVENTION

[0011] As one of ordinary skill in the art can infer from the preceding portions of the present disclosure, the area of an outdoor drain cover designed to prevent obstructions of the outdoor drain and allow water to flow into the drain (referred to throughout this disclosure as the “drainage area”) is typically limited to the open surface area formed by perforations, slots or the like. However, when a drainage area of an outdoor drain cover becomes obstructed by grass, leaves or other types of debris, the remaining open surface area of the drainage area defines an “effective drainage area” that is limited to that surface area of the drainage area which remains unobstructed. It is a key objective of the invention to increase the effective drainage area of an outdoor drain by providing an ODF with side filtration means situated outside a perimeter of a drainage area of an outdoor drain cover such that the effective drainage area of the outdoor drain cover is significantly augmented, thereby maintaining the operability of the drain and preventing debris from obstructing the effective drainage area. It is a further objective of the invention of the present disclosure to provide a diverter for water accumulating to a maximum water level in the event that the provided side filtration means become obstructed, such that once water accumulates to the maximum water level, it is diverted into the open drain to prevent flooding of the surrounding areas.

[0012] Turning now to the drawings, Figure 1 shows a top isometric view of an embodiment of the ODF 100 of the present disclosure comprising frame 102 defining the horizontal dimensions of a side filtration means 101, an upper filtration means 103 and a diverter 200. The diverter 200 comprises an air vent 201 turning downward from a pipe 202 protruding upward from at least one lateral pipe 203 preferable spanning at least one dimension of the ODF and with at least one downward elbow 204 at each end of the at least one lateral pipe 203. The at lower inner surface of the at least one lateral pipe 203 defines a maximum water level 205 at which water will enter the diverter 200 should it accumulate to that height. The embodiment of the ODF of Figure 1 shows an optional thumb-turn 104 that enables the user to lock the ODF 100 onto an underlying drain cover.

[0013] One of ordinary skill in the art will appreciate that while the ODF 100 of Figure 1 includes diverter 200 comprising a lateral pipe 203 spanning the width of the ODF 100 through the frame 102, that the lateral pipe 203 may alternatively be situated above or below the frame 102. Additionally, while the air vent 201 is configured a downtumed extension (“downturn”) of a pipe 202 protruding upward from the at least one lateral pipe 203, that any configuration that adequately vents the at least one lateral pipe 203 such that it draws water toward the outdoor drain when the maximum water level is achieved functions as an equivalent to the air vent 201 shown. One of ordinary skill in the art will also appreciate that while the air vent 201 of the ODF 100 of Figure 1 is oriented in parallel with the underlying lateral pipe 203, any orientation that allows the at least one lateral pipe 203 to draw water when the maximum water level is achieved is equivalent.

[0014] Turning now to Figure 2, depicted is a side view of an embodiment of the ODF 100 of the present invention with a diverter 200 comprising at least one lateral pipe 203 situated above the frame 102 and upper filtration means 103 is shown. The illustrated ODF 100 comprises an air vent 201 comprising a downturn oriented perpendicular to the underlying at least one lateral pipe 203 and connected thereto by a pipe 202 protruding upwardly from the at least one lateral pipe 203. A maximum water level 205 is defined by the lower inner surface of the at least one lateral pipe 203, which is continuous with at least one downward elbow 204 situated outside the horizontal bounds of the side filtration means 101. In this embodiment, the ODF 100 further comprises a bracket 206 for receiving a weight, such as but not limited to a brick, as an alternative for holding the ODF 100 in place over the underlying outdoor drain.

[0015] Moving on to Figure 3, a front view of an embodiment of the ODF 100 of the present disclosure is provided, again with the at least one lateral pipe 203 of the diverter 200 situated above the frame 102 and upper filtration means 103. The pipe 202 that protrudes upwardly from the at least one lateral pipe 203 is shown as extending downward through the frame 102. In this embodiment, the portion of the pipe 202 extending downward through the at least one lateral pipe 203 must be equipped with openings where the at least one lateral pipe 203 meets the pipe 202 in order for water drawn into the at least one lateral pipe 203 when the maximum water level 205 is reached drains downward. Also, in this embodiment, the bottom of the pipe 202 must be open ended to allow said water to flow into the underlying drain. One of ordinary skill in the art will appreciate that the pipe 202 may, but need not, extend downward beyond the upper surface of the at least one lateral pipe 203, which may simply comprise a hole into which entering water drains when the maximum water level 205 is reached.

[0016] Figure 4 shows a cross-sectional rear view of an embodiment of the ODF 100 of the present invention similar to that shown in Figure 3, except the optional bracket 206 is absent and instead an optional thumb-turn 104 is present, the thumb-turn 104 being continuous with a hook 401 capable of being inserted into a drain cover 402 through an opening in a grate, for example, then locked around an adjacent solid member of the grate to hold the ODF 100 in place over the underlying drain 403.

[0017] Figure 5 shows a top view of an ODF 100 as described in the present disclosure, showing a diverter 200 comprising at least one lateral pipe 103 situated above the frame 102 and upper filtration means 203, with air vent 201 and optional thumb-turn 104 for locking the ODF 100 in place over an underlying drain as previously described.

[0018] Figure 6 shows a bottom view of an embodiment of an ODF 100 of the present disclosure, comprising a side filtration means 101 consisting essentially of side filtration members 601 and interstitial spaces 602 arranged beneath a top filtration means 103 with a diverter 200 configured with at least one lateral pipe 203 with downward elbows 204. In this embodiment, the two concentric circles below the upper filtration means 103 represent a pipe 202 that extends downward past the at least one lateral pipe 203 and allows for drainage of water therefrom, and the downward elbows 204 outside the side filtration means 101 are in the form of coupled elbows as opposed to being continuous with the at least one lateral pipe 203, illustrating the possibility of modular construction of certain aspects of the invention.

[0019] The side filtration means 101 may be made of suitable material and of a suitable configuration to allow the passage of water through the side filtration 101 means and into an underlying outdoor drain even when debris accumulates around the ODF 100. In one embodiment, the ODF 100 is a standalone apparatus comprising an upper filtration means 103 and side filtration means 101 that may be placed above an existing outdoor drain cover such that the side filtration means 101 surrounds the perimeter of the drain cover and allows the flow of water into the open drain. In addition, an upper filtration means 103 is provided, and the side filtration means 101 allows water to flow into the drain through the side filtration means 101 even when the upper filtration means 103 becomes partially or completely obstructed.

[0020] The side filtration means 101 is configured as a plurality of side filtration members 601 separated by a plurality of interstitial spaces 602 which together act as an entry barrier for solid and waterborne debris that would otherwise accumulate above the outdoor drain. In certain embodiments, the side filtration means at least partially prevents the movement of sediment, and in particular waterborne sediment, into the outdoor drain. Sediment as referenced herein includes naturally occurring particulate material, wherein the particle sizes range from 1 - 800 microns, inclusive of all subranges within the range. The movement of sediment into the outdoor drain may be prevented due to the sediment particle sizes being too large to pass through the interstitial spaces 602 of the side filtration means 101, or due to the adherence of the sediment particles to the side filtration members 601 due to the physical forces present.

[0021] In a preferred embodiment of the ODF 100 of the present disclosure, the side filtration means 101 is of a vertical height less than or equal to a maximum water level 205, such that water can flow into a diverter 200 through an at least one lateral pipe 203 when the maximum water level 205 is reached. A maximum water level 205 may be determined according to manufacturing specifications supplied to a manufacturer of the ODF 100, or the height of the side filtration means 101 may be made adjustable such that a user of the ODF 100 of the present disclosure may select a desired water height from within a range of adjustment. One of ordinary skill in the art will appreciate that a selected maximum water level 205 will depend on the application of the ODF 100 of the present disclosure.

[0022] For example, as applied to a walkout basement setting, the maximum water level 205 desired will most likely be at or below a vertical height at which water, were it to rise to that level, would enter into the adjacent basement. For example, as applied to a landscape drainage scenario, the maximum water level 205 desired might be at or below a vertical height at which water, were it to rise to that level, might travel toward an outer building foundation located nearby, or into a useful area such as a garden, pool, patio, playground, shed or garage where it could cause undesirable flooding of the useful area. These examples are offered for the purposes of illustration and not limitation.

[0023] In certain embodiments of the present invention, the ODF components may be modular and sold separately so that multiple styles and configurations of both the side filtration means 101 and upper filtration means 103, with or without diverter 200, may be used interchangeably with one another. In other embodiments of the present invention, an ODF 100 of the present disclosure may be integrated with a drain cover to provide a drain cover comprising an ODF or one or more ODF components. In certain embodiments, an ODF 100 of the present disclosure may be integrated with an outdoor drain reservoir, such as an outdoor drain box, thereby obviating the need for a standalone or integrated drain cover. In such embodiments, one of ordinary skill in the art will appreciate that the upper filtration means 103 will act as a drain cover, albeit elevated above the drain according to the collective height of the side filtration means 101 and frame 102. [0024] The ODF 100 comprises a side filtration means 101 which completely surrounds the perimeter of an underlying drain cover. One of ordinary skill in the art will understand that the side filtration means 101 must be of appropriate configuration and material to allow drainage of water therethrough while preventing clogging of the drain cover. For example, the side filtration means 101 may be configured as a plurality of bristles or bristle-like members that allow water to drain in between them even when obstructed by debris. Alternatively, the side filtration means 101 may be configured as a water-permeable membrane or similar means of allowing the passage of water therethrough. For example, the side filtration means 101 may be configured as bristles, bristle-like members, baffles, registers, vents, water-permeable membranes, screens, sponges, meshes, or any structure adequate for allowing water to flow into the underlying drain at an operable rate.

[0025] One of ordinary skill in the art will appreciate that the ODF components or an integrated ODF assembly of the present invention must be constructed of materials capable of withstanding outdoor stresses such as sunlight, precipitation, heat and cold temperatures while remaining intact and operable. For example, the ODF or ODF components may be made of metal, treated or untreated wood, rubber, plastic, thermoplastic, polyvinyl chloride (PVC) or other synthetic material suitable for the desired application. An ODF of the present disclosure or ODF components may be made using known manufacturing processes such as molding or extrusion, for example and not by way of limitation.

[0026] One of ordinary skill in the art will appreciate that the upper filtration means 103 may resemble that of an underlying drain cover, comprising a drainage area defined by an open surface area which is further defined by slots, perforations, holes, or other openings that allow the downward flow of water into the underlying drain. These examples are provided for illustrative purposes and are not meant to be considered limitations of the present invention.

[0027] One of ordinary skill in the art will appreciate that a side filtration means 101 of the present disclosure may comprise equivalent structures to those depicted herein and may be selected from the group consisting of structures that allow for the adequate flow of water through the side filtration means 101 to achieve the purpose of the invention. One of ordinary skill in the art will further appreciate that the side filtration means 101 will be present around perimeter of an ODF 100 beneath the frame 102, with the central area of the upper filtration means 103 occurring within the inner horizontal perimeter of the side filtration means 101 and/or frame 102. This configuration allows for the downward flow of water through the upper filtration means 103, and in the event that the upper filtration means 103 becomes obstructed, water may continue to flow through the side filtration means 101 to reduce the accumulation of water in the area surrounding the outdoor drain the ODF 100 is designed to maintain in operable condition.

[0028] A diverter 200 of the present invention comprises an air vent 201 configured in any manner suitable for allowing the draw of water into the at least one lateral pipe 203 of the present invention when the maximum water level 205 is reached. The at least one lateral pipe 203 may span the frame 102 or ODF 100 in at least one dimension and terminate at each end with at least one downward elbow 204, open-ended to allow water to rise to the maximum water level 205 defined by the lower inner surface of the at least one lateral pipe 203 of the diverter 200. One of ordinary skill in the art will appreciate that the diverter 200 provides an additional layer of functionality with respect to maintaining the subject outdoor drain in and operable state and preventing the accumulation of water above the maximum water level 205. Thus, an ODF 100 of the present disclosure may be selected, for example, wherein the height of the lower internal surface of the at least one lateral pipe is lower than the height of a water level that would result in undesirable flooding of a surrounding area of an outdoor drain. An ODF 100 of the present invention may comprise multiple lateral pipes extending in any possible angle from the upper pipe 202 outward toward the perimeter of the ODF 100.