An areaway drain cover with a top surface, a bottom surface, and a peripheral edge surface with a plurality of passages passing from the top surface to the bottom surface which allow water to pass through the passages while preventing leaves and debris from clogging the drain. The bottom surface als
An areaway drain cover with a top surface, a bottom surface, and a peripheral edge surface with a plurality of passages passing from the top surface to the bottom surface which allow water to pass through the passages while preventing leaves and debris from clogging the drain. The bottom surface also comprises a plurality of protrusions projecting downwardly from the bottom surface so that when the drain cover is placed over a drain, the protrusions allow the drain cover to be spaced horizontally above the surface on which the drain cover is resting so as to allow water to pass.
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1. A single piece molded drain cover having a generally planar top surface having a first surface area, a bottom surface parallel to said top surface having a second surface area which is larger than said first surface area and having a shape the same as said top surface and a peripheral edge surfac
1. A single piece molded drain cover having a generally planar top surface having a first surface area, a bottom surface parallel to said top surface having a second surface area which is larger than said first surface area and having a shape the same as said top surface and a peripheral edge surface connecting said top surface with said bottom surface, said drain cover further comprising a plurality of passages passing from said top surface to said bottom surface which allow water to pass through said passages, said lower surface further comprising a plurality of protrusions located inwardly of an outer peripheral edge of the bottom surface, said protrusions projecting downwardly from said bottom surface so that when said drain cover is placed over a drain said protrusions rest on a surface on which said drain cover is resting such that the portion of said bottom surface containing said protrusions is spaced horizontally above said surface so as to allow water to flow through said plurality of passages and then between said protrusions towards said drain. 2. The drain cover according to claim 1, wherein said peripheral edge surface is angled between 30 and 60 degrees relative to horizontal. 3. The drain cover according to claim 1, which has a circular shape when viewed from the top. 4. The drain cover according to claim 3, wherein said drain cover has a diameter of about 18 to 30 inches. 5. The drain cover according to claim 1, wherein said plurality of protrusions protrude downwardly from said lower surface at least 0.25 inch. 6. The drain cover according to claim 1, wherein said drain cover is made from plastic or rubber material that is a non-absorbent, non-porous plastic or rubber material. 7. The drain cover according to claim 1, wherein said material is sufficiently rigid so that when placed on a flat surface said drain cover does not sag between said plurality of protrusions to an extent whereby said drain cover touches the surface on which said drain cover is resting and wherein said material also has flexibility so that said material will deform under its own weight when placed on an uneven surface. 8. The drain cover according to claim 1, wherein said plurality of passages are circular in shape when viewed from the top. 9. The drain cover according to claim 1, wherein said plurality of passages are arranged in a regular pattern over at least 50% of said first surface area of said top surface. 10. The drain cover according to claim 1, wherein said plurality of passages are arranged in a regular pattern over at least 80% of said first surface area of said top surface. 11. The drain cover according to claim 1, wherein said peripheral edge surface is in a shape of a truncated cone. 12. The drain cover according to claim 1, wherein some of said plurality of projections are located on a peripheral area of said bottom surface and inwardly from the outer peripheral edge of said bottom surface, whereby said peripheral edge is spaced horizontally above said surface on which said drain cover is resting so as to allow water to pass under said peripheral edge surface. 13. A packaged drain cover comprising a drain cover described in claim 1 and packaging physically associated with said drain cover with instruction that said drain cover should be placed over a drain. 14. The drain cover according to claim 1, wherein said plurality of protrusions have a smooth contoured surface. 15. The drain cover according to claim 1, wherein the height of each protrusion is less than or equal to the diameter of each protrusion. 16. The drain cover according to claim 1, wherein said drain cover is circular in shape and has a diameter of 12 to 36 inches. 17. The drain cover according to claim 1, wherein each of said protrusions is spaced equidistant from four adjacent passages. 18. A single piece molded drain cover having a generally planar top surface having a first surface area, a bottom surface parallel to said top surface having a second surface area which is larger than said first surface area and having a shape the same as said top surface and a peripheral edge surface connecting said top surface with said bottom surface, said drain cover further comprising a plurality of passages passing from said top surface to said bottom surface which allow water to pass through said passages, said lower surface further comprising a plurality of protrusions projecting downwardly from said bottom surface so that when said drain cover is placed over a drain, the portion of said bottom surface containing said protrusions is spaced horizontally above a surface on which said drain cover is resting so as to allow water to flow through said plurality of passages and then between said protrusions towards said drain, wherein said passages and said protrusions are arranged in a regular pattern and there is a 1:1 correspondence between the number of passages and the number of protrusions throughout said bottom surface of said drain cover except that there are additional protrusions on said bottom surface of said drain cover around a peripheral portion of said bottom surface of said drain cover. 19. A method for reducing the clogging of a stairwell drain by leaves, comprising the step of: placing over a stairwell drain a single piece molded drain cover to reduce clogging in an exterior stairwell having a top surface, a bottom surface parallel to said top surface and a peripheral edge surface, said drain cover further comprising a plurality of passages passing from said top surface to said bottom surface for allowing water to pass through said passages, said lower surface further comprising a plurality of protrusions located inwardly of an outer peripheral edge of the bottom surface, said protrusions projecting downwardly from said bottom surface so that when said drain cover is placed over a drain said protrusions rest on a surface on which said drain cover is resting such that the portion of said bottom surface containing said protrusions is spaced horizontally above said surface so as to allow water to flow through said plurality of passages and then between said protrusions towards said drain. 20. In combination, an exterior stairwell drain and a single piece molded drain cover placed over said stairwell drain, said plastic drain cover having a top surface, a bottom surface parallel to said top surface and a peripheral edge surface, said drain cover further comprising a plurality of passages passing from said top surface to said bottom surface for allowing water to pass through said passages, said lower surface further comprising a plurality of protrusions located inwardly of an outer peripheral edge of the bottom surface, said protrusions projecting downwardly from said bottom surface so that when said drain cover is placed over said drain said protrusions rest on a surface on which said drain cover is resting such that the portion of said bottom surface containing said protrusions is spaced horizontally above said surface so as to allow water to flow through said plurality of passages and then between said protrusions towards said drain.
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이 특허에 인용된 특허 (36)
Boersma Donald J. (18610 John St. Country Club Hills IL 60477), Adjustable drain cover.
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