Underdrain system

Details Underdrain system Underdrain system

2007-06-22

2011-11-08

Savage, Matthew (Department: 1778)

Liquid purification or separation

With repair or assembling means

C210S291000

Reexamination Certificate

active

08052870

ABSTRACT:
A filter system for filtering water and/or wastewater which includes an underdrain system having a plurality of laterals that are anchored to the floor of a filter by a hold-down assembly. Preferably, the hold-down assembly does not rely on grout or other substance that is applied in a viscous or semi-viscous state and subsequently hardened as the primary means for connecting the underdrain laterals to the floor of the filter. Preferably, the hold-down assembly includes hold-down clips that can move relative to an anchor assembly and corresponding underdrain blocks so that the hold-down clips can cooperate with any desired portion of the corresponding underdrain blocks.

REFERENCES:
patent: 1339226 (1920-05-01), Schuster
patent: 2378239 (1945-06-01), Myron
patent: 3110667 (1963-11-01), Stuppy
patent: 4133766 (1979-01-01), Adie
patent: 5019259 (1991-05-01), Hambley
patent: 5618426 (1997-04-01), Eischen et al.
patent: 5865999 (1999-02-01), Shea et al.
patent: 5976370 (1999-11-01), Medworth
patent: 6048132 (2000-04-01), Kupke et al.
patent: 6325931 (2001-12-01), Roberts et al.
patent: 6569327 (2003-05-01), Roberts et al.
patent: 6797166 (2004-09-01), Hambley et al.
patent: 7820043 (2010-10-01), Roberts et al.
patent: 2001 0068818 (2001-07-01), None
Hool et al, Concrete Engineer's Handbook, 1918, McGraw-Hill, pp. 142-143.
EP Application No. EP07251543; European Partial Search Report, Oct. 5, 2007.
EP Application No. EP07251543: European Extended Search Report, Jan. 29, 2008.
U.S. Appl. No. 11/400,300, filed Apr. 10, 2006.
Photograph obtained from web site at www.awifilter.com/products/underdrain/index.htm.
AWI brochure entitled “Optimize your filter system” Publication dated unknown.

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