Liquid purification or separation – With repair or assembling means
Patent
1989-07-11
1991-07-02
Dawson, Robert A.
Liquid purification or separation
With repair or assembling means
210289, 210291, 210293, B01D 2988
Patent
active
050283227
ABSTRACT:
A strainer assembly for use in a filter having a granular media bed supported above a floor. The strainer assembly includes a low profile body member having a two tiered construction, the bottom tier having a larger diameter than the upper tier. Each of the tiers has a series of substantially equally spaced apart, generally vertical, slot openings formed therein. The total area of the openings in the bottom tier is from about 3 to 15 times greater than the total area of the openings in the upper tier. An improved distribution/fastening means is provided for directing fluid through the body member and for retaining the body member in position above the floor.
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Literature entitled "Graver Roto Scour Underdrain Systems".
Literature entitled "Concrete Mono-Pak Filter".
Dawson Robert A.
Drodge Joseph
The Graver Company
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