An over grate filter for covering a grate and filtering storm water runoff is claimed and described. The over grate filter of the invention helps to control the flow of waterborne sediment and pollutants into the storm water grate, and it also serves to reduce the amount of sediment entering drainag
An over grate filter for covering a grate and filtering storm water runoff is claimed and described. The over grate filter of the invention helps to control the flow of waterborne sediment and pollutants into the storm water grate, and it also serves to reduce the amount of sediment entering drainage systems. The invention may be fabricated from any filtration fabrics, including woven and non-woven fabrics. The selection of the specific filter fabric used in the invention depends on the anticipated storm water flow velocities, the anticipated pollutant volume and the expected maintenance schedule. The over grate filter of the invention may comprise multiple layers of filter material and a supporting inner core that enables the filter to lie flat on the storm water grate, providing improved wear resistance against foot and vehicle traffic and street sweeping activity over the prior art methods for filtering storm water.
대표청구항▼
1. An over grate filter, comprising: a filter; andat least one retaining plate assembly for retaining said filter onto an upper surface of a grade; structurewherein said retaining plate assembly further comprises at least one lower retaining plate, at least one upper retaining plate, and a fastener
1. An over grate filter, comprising: a filter; andat least one retaining plate assembly for retaining said filter onto an upper surface of a grade; structurewherein said retaining plate assembly further comprises at least one lower retaining plate, at least one upper retaining plate, and a fastener having an upper end and a lower end;a fastener stop disposed on said lower end of said fastener and in contact with a bottom side of said at least one lower retaining plate; andsaid fastener passing through said lower retaining plate, and passing through said filter, and passing through said upper retaining plate; andsaid fastener further comprising a locking mechanism on its upper end, said locking mechanism in contact with an upper surface of said upper retaining plate. 2. The over grate filter of claim 1, wherein said fastener is further defined as a zip tie having a head. 3. The over grate filter of claim 2, wherein said fastener stop is said head of said fastener. 4. The over grate filter of claim 3, wherein said locking mechanism is the head of a zip tie. 5. The over grate filter of claim 4, wherein said filter is further defined as being fabricated from at least one layer of permeable filter fabric. 6. The over grate filter of claim 3, wherein said filter is further defined as being fabricated from at least one layer of permeable filter fabric. 7. The over grate filter of claim 2, wherein said locking mechanism is the head of a zip tie. 8. The over grate filter of claim 7, wherein said filter is further defined as being fabricated from at least one layer of permeable filter fabric. 9. The over grate filter of claim 2, wherein said filter is further defined as being fabricated from at least one layer of permeable filter fabric. 10. The over grate filter of claim 1, wherein said filter is further defined as being fabricated from at least one layer of permeable filter fabric. 11. The over grate filter of claim 1, wherein said filter further comprises a media selected from the group consisting of flocculants, coagulants, extra activated charcoal filters, heavy metal filters and hydrocarbon filters. 12. A method for filtering storm water runoff, comprising: providing a filter;disposing said filter on an upper surface of a structure;providing at least one retaining plate assembly for retaining said filter onto said structure, wherein said retaining plate assembly further comprises at least one lower retaining plate, at least one upper retaining plate, and a fastener having an upper end and a lower end;providing a fastener stop disposed on said lower end of said fastener and in contact with a bottom side of said at least one lower retaining plate, said fastener passing through said lower retaining plate, and passing through an opening in said structure, and passing through said filter, and passing through said at least one upper retaining plate;providing a locking mechanism on said upper end of said fastener, said locking mechanism in contact with an upper surface of said at least one upper retaining plate;passing a fluid containing contaminants through said filter and said structure such that said contaminants are removed from said fluid; andwherein said structure is a storm water grate. 13. The method for filtering storm water runoff of claim 12, wherein said filter is comprised of at least one layer of permeable filter fabric. 14. The method for filtering storm water runoff of claim 13, wherein said filter further comprises a media selected from the group consisting of flocculants, coagulants, extra activated charcoal filters, heavy metal filters and hydrocarbon filters. 15. The method for filtering storm water runoff of claim 12, wherein said filter further comprises a media selected from the group consisting of flocculants, coagulants, extra activated charcoal filters, heavy metal filters and hydrocarbon filters.
Murfae George W. (4105 Bennedict Austin TX 78746) Howell Pix D. (8613 Montevista Cove Austin TX 78736), Storm water filtration system for use with conventional storm water collection sewers.
MacPherson ; Jr. John W. (Snohomish WA) O\Neal Brian L. (Bothell WA), System for filtering liquids in a catch basin using filters in series and overflow channels.
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