Storm drain filter assembly

Details Storm drain filter assembly Storm drain filter assembly

2005-03-22

2005-03-22

Cecil, Terry K. (Department: 1723)

Liquid purification or separation

Structural installation

Grated inlet surface drain

C210S170050, C210S232000, C210S457000, C210S502100, C404S005000

Reexamination Certificate

active

06869526

ABSTRACT:
A device for removing petroleum based contaminants from the runoff water that passes into a storm drain. The device is a filter apparatus that can be added to a storm drain. The filter apparatus includes a filter cage that defines an open central conduit and a filter cartridge that wraps around the periphery of the filter cage. During normal rain conditions, water enters the sewer grate near the edges of the sewer grate. This water falls through the filter cartridge and is filtered. Solid debris that is mixed with the water is deflected through the central conduit and falls through the filter apparatus. During flood conditions, excess water is allowed to pass through the center conduit of the filter cage unfiltered in order to preserve the water flow capacity of the storm drain.

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