Filter insert for curb inlet drain
AssigneeMetrochem, Inc.
InventorsDerek Sasaki, Roni Sasaki
Life of this patent
Estimating the term…
Abstract
The curb inlet filter includes a filter bag having an opening at an upper end leading into an interior of the filter bag and a support bar coupled to one side of the upper end of the filter bag. The support bar is configured to rest outside of the basin against curb face sides bounding the opening in the street level curb face. A support frame is coupled to a second side of the upper end of the filter bag and is configured to engage with the support bar to suspend the support frame substantially at grade within an interior of the basis and define a rigid opening into the filter bag. The remainder of the filter bag hangs below grade within the curb side drain basin.
Claims20
A curb inlet filter for use with a curb-side drain, said drain of a type including a below-grade basin having an at-grade, elongated opening aligned with an opening in a street-level curb face, wherein the curb inlet filter includes:
- a filter bag having an opening at an upper end leading into an interior of the filter bag;
- a support bar coupled to one side of the upper end of the filter bag and configured to rest outside of the basin against curb face sides bounding the opening in the street level curb face;
- and
- a support frame coupled to a second side of the upper end of the filter bag and configured to engage with the support bar to suspend the support frame substantially at grade within an interior of the basin and define a rigid opening into the filter bag.
A method for installing a curb inlet filter into a curb-side drain, the method comprising:
- installing an elongate rigid portion of the filter at grade level outside of a curb-side drain basin;
- suspending a semi-rigid spring portion of the filter at grade within the curb-side drain basin;
- coupling the elongate rigid portion and semi-rigid spring portion together to define an opening into the curb inlet filter;
- and
- disposing a remaining portion of the curb drain filter below grade in the drain basin so that water and debris flowing into the curb-side drain fall through the opening into an interior of the curb inlet filter and water exits through holes formed in the filter but that debris is retained therein.
A curb-side drain filter bag comprising:
- a first filter fabric panel having a bottom edge, top edge, and side edges;
- a second filter fabric panel having a bottom edge, top edge and side edges, the first fabric panel being longer than the second filter fabric panel so that an upper portion extends past the second filter fabric panel;
- the second filter fabric panel being joined along bottom and side edges to respective bottom and side edges of the first filter fabric to form an opening into the filter bag, with upper side edge portions of the first filter fabric not being joined to the second filter fabric panel to form a free expanse;
- loops formed within at a top edge of the first and second filter fabric panels;
- a support frame partially received within the loops of the second filter fabric panel and having exposed terminal portions approximately equal in length to the free expanse of the first filter fabric panel;
- a support bar received within loops of the first filter fabric panel and slidingly coupled to terminal ends of the support frame terminal portions, the support bar and support frame forming a rigid opening into an interior of the filter bag with the expanse configured to guide water and debris into the interior of the filter bag when the bag is installed within a curb-side drain.
Dependencies are inferred from the claim text.