Trench drain filter assembly

Details Trench drain filter assembly Trench drain filter assembly

2007-01-22

2008-05-20

Lagman, Frederick L (Department: 3672)

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

C405S043000, C210S170030, C210S323200, C210S457000

Reexamination Certificate

active

07374364

ABSTRACT:
An improved trench drain filter and modular system therefor for intercepting and treating run off water in a trench drain before discharge into a drainage system. The filter elements include a perforated pipe covered with one or more layers of geotextile material, which is, in turn, covered with a permeable fabric membrane. In a preferred embodiment a pouch containing an absorbent agent is disposed within the pipe upstream of the discharge point, and in another embodiment a multi-filter modular unit is provided, the unit including a plurality of filter elements disposed in an enclosure having fluid flow control baffles to direct fluid to and through the filter elements.

REFERENCES:
patent: 2521833 (1950-09-01), Dahl
patent: 2540272 (1951-02-01), Malmstrom et al.
patent: 3950252 (1976-04-01), Jordan et al.
patent: 4400274 (1983-08-01), Protos
patent: 6177004 (2001-01-01), Bracone, Jr.
patent: 6277280 (2001-08-01), Houck
patent: 6383372 (2002-05-01), Houck et al.

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