System and method for uniformly distributing a fluid through...

Liquid purification or separation – Particulate material type separator – e.g. – ion exchange or... – With rehabilitation means

Reexamination Certificate

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C210S274000, C210S275000, C210S279000, C210S291000

Reexamination Certificate

active

07922903

ABSTRACT:
A system and method for uniformly distributing fluids (e.g., washing and in-service) through a filter bed of a filter. The system and method of the present invention can be used with any type of filter that uses media to remove impurities from a fluid. The filter bed can include one or more layers of media. The media can be natural (e.g., sand, gravel, anthracite, etc.) or can be fabricated (e.g., plastic). The filter media can be supported by one or more layers of gravel. Alternatively, the filter media can be supported by a porous plate or other support designed to replace the gravel layers. The present invention includes a system having a distribution member configured to uniformly distribute a fluid through a filter bed of a filter. Preferably, the distribution member can be readily installed by relatively unskilled labor in both existing filters and new filters.

REFERENCES:
patent: 5019259 (1991-05-01), Hambley
patent: 5087362 (1992-02-01), Brown
patent: 6306310 (2001-10-01), Bergmann et al.
patent: 6312611 (2001-11-01), Bergman et al.
patent: 6797166 (2004-09-01), Hambley et al.
Leopold, Dec. 14, 1999, Universal Type SL Underdrain with IMS Cap, H-Flume Filter Arrangement and Orifice Plate Details, three (3) pages.
Tetra Technologies, Inc., Nov. 22, 1989, Gravity Filter Plant (General Arrangement. Filter Internals Sections and Details), three (3) pages.

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