Storm drain systems for filtering trash and hydrocarbons
AssigneeAbTech Industries, Inc.
InventorsJames F. Morris, Stephen C. Stelpstra, Mark Thurman Kahn, Stephen F. Pegler, Scott L. Larsen
Life of this patent
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Abstract
A storm-drain insert has separate collection systems for trash and oil or other hydrocarbons. A tilted grate separates trash from oily inlet water and directs the trash to a separate basket, and the water flows through a corrugated, flexible canister containing a hydrophobic, compliant, oil-absorbent, copolymer material arranged in a number of bodies having high surface area. Preferably, the material is formed with a binder in a novel extrusion process. The inserts can be suspended in a storm drain adjacent to a curb inlet.
Claims20
A device for filtering oil and trash from storm water passing through a curb inlet comprising:
- (a) a perforated plate oriented substantially away from a horizontal plane and having a lower edge;
- (b) an open-topped basket coupled to and extending beyond the lower edge of the plate;
- (c) a canister under the plate;
- and
- (d) an oil-sorbent filter medium in the canister.
The device of claim 4 wherein the canister is comprised of a polyethylene plastic material.
A device for filtering oil and trash from storm water comprising the following coupled elements:
- (a) means for separating trash from a water flow passing through a curb inlet;
- (b) means for collecting trash;
- and
- (c) means for filtering oil from the water flow after the trash has been separated therefrom.
Dependencies are inferred from the claim text.