Storm drain grate and filter apparatus and method
AssigneeFrog Creek Partners, LLC
InventorsBrian Deurloo, Thomas James Stypula
Life of this patent
Estimating the term…
Abstract
A storm water capture and filtration system may secure in a catch basin or other area subject to flows of water from streets, channels, and the like as a result of run off from storms. A filter system may include a capture portion including attachment mechanisms, a funnel, various supports, and a filter hanger designed and calculated to capture all water entering a storm water inlet and directing it toward a bag filter. A gap is provided between a funnel and filter hanger in order to provide accommodation for overflow, while an anti-backflow skirt on the filter bag resists flushing of captured pollution out of the bag in overflow condition.
Claims20
An apparatus comprising:
- a structure capable of receiving a flow of waste and capturing solids from the flow, by directing the flow as runoff through a filter bag capable of filtering out solids as pollution swept along with the runoff;
- the filter bag, wherein the solids comprise sediment more dense than the runoff and debris less dense than the runoff;
- the filter bag formed to have an upper portion and lower portion, the lower portion formed of a filter medium capable of collecting the sediment while passing water therethrough, and the upper portion comprising a backflow preventer formed of a flexible material extending radially inward from the filter bag and capable of directing the debris back into an interior of the bag below the backflow preventer while passing the runoff out of the filter bag through a sphincter bounding an interior edge of the backflow preventer.
A method for separating solids from a flow, the method comprising:
- providing a structure operable to support a filter bag placed in a flow;
- providing the filter bag comprising a lower portion formed of a filter medium capable of collecting sediment, particulate matter more dense than water, and an upper portion comprising a backflow preventer capable of directing debris, matter less dense than water and of size comparatively much larger than the sediment, radially inward into the flow received by the filter bag;
- providing the back flow preventer with a sphincter having a diameter less than that of the filter bag at the back flow preventer, the back flow preventer being flexible, secured to the filter bag, and having an inner edge of diameter less than that of the filter bag where secured, to redirect backflows, moving counter to the flow incoming, back into the flow incoming;
- positioning the structure so as to expose the filter bag to the flow;
- and
- collecting, by the filter bag, the sediment and debris received from the predetermined flow into the filter bag.
Dependencies are inferred from the claim text.