Filter media retaining cap and hold down grid
AssigneeUSFilter Corporation
InventorsScott Jackson, Darin St. Germain, Thomas J. Steinke, Paul M. Gallagher
Life of this patent
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Abstract
The invention recites a filtration tank including a chamber for holding liquid to be filtered, the filtration tank includes a fluid inlet for providing liquid to the chamber. The filtration tank further includes a fluid outlet and at least one filter block disposed between the inlet and the outlet, wherein the at least one filter block includes a porous cap having an average pore size of up to about 250 microns.
Claims37
A filtration tank including a chamber for holding liquid to be filtered, the filtration tank comprising:
- a fluid inlet for providing liquid to the chamber;
- a fluid outlet;
- at least one filter block disposed between the inlet and the outlet, wherein said at least one filter block includes a porous cap consisting of a single plate having an average pore size of up to about 250 microns throughout the thickness of the plate;
- and
- a filter media between the fluid inlet and the fluid outlet, the filter media filtering liquid flowing from the fluid inlet to the fluid outlet, the filter media being above and at least partially supported by the porous cap.
A filtration tank, comprising:
- a fluid inlet;
- a fluid outlet;
- a flume disposed therebetween;
- a plurality of filter blocks in fluid communication with the flume, the filter blocks each including a top surface;
- a porous cap disposed on the top surface of at least one of the filter blocks, the porous cap consisting of a single plate having pores having an average pore size of up to about 250 microns throughout the thickness of the cap;
- a hold down grid positioned above the porous cap for holding the porous cap on the top surface;
- and
- a filter media disposed above the hold down grid and at least partially supported by the porous cap.
A filtration media support for supporting a filter media in a filter tank assembly comprising:
- a plurality of filter blocks disposed in a filter tank;
- and
- a cap disposed above each of the filter blocks, the cap consisting of a single porous plate having an average pore size of about 250 microns or less throughout the thickness of the plate, the cap at least partially supporting the filtration media;
- and
- a support grid disposed above the cap and attached to the filter block.
Dependencies are inferred from the claim text.