Scott De

US Patent:

6649048, Nov 18, 2003

Filed:

Nov 20, 2001

Appl. No.:

09/990564

Inventors:

Scott A. de Ridder - Portland OR

Assignee:

Stormwater Management - Portland OR

International Classification:

B01D 3522

US Classification:

210106, 210119, 210120, 210123, 210136, 210170, 210430

Abstract:

A filter assembly that filters water, particularly stormwater, that includes flow regulating, siphon inducing, and surface cleaning features that allow the filter assembly to operate at the design filtration rate for an extended period of time. During filtration, water flows inward through an annular filter medium into a drain manifold. The rate of flow into the drain manifold is controlled by a float valve assembly. A check valve permits air to escape, but not enter, the filter assembly creating a siphon effect when the rate of flow into the drain manifold is increased. The siphon effect draws water through the entire filtration surface and the entire volume of the filter medium. When the external water level decreases to the level of an array of voids in the filter assembly enclosure, the siphon is interrupted by turbulent air streams entering the filter assembly, agitating the filter surface and dislodging particulate matter.

US Patent:

8512555, Aug 20, 2013

Filed:

Feb 4, 2010

Appl. No.:

12/700224

Inventors:

Scott A. de Ridder - Portland OR, US
Christopher S. Hersey - South Portland ME, US
Daniel P. Cobb - Portland ME, US
Greg Kowalsky - Portland OR, US
Alan K. Stratton - Milford NH, US

Assignee:

Contech Engineered Solutions LLC - Wester Chester OH

International Classification:

B01D 35/30
B01D 24/10

US Classification:

21017003, 210439, 210440, 210292

Abstract:

A stormwater filter assembly includes a hood and an outlet tube within the hood for draining filtered stormwater. The outlet tube has a solid wall along at least a portion of its height, and an inlet above the solid wall. A second tube is disposed about the outlet tube defining a flow space therebetween for receiving filtered stormwater. The second tube includes a wall that is perforated along at least a portion of its height that overlaps with the solid wall of the outlet tube such that filtered stormwater that enters the flow space must move upward to enter the outlet tube. A filter media is disposed between the hood and the second tube through which stormwater travels during a filtering operation.