# US 8,771,514 B2 · Sequential filter pack for fluids

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- Number: US 8,771,514 B2
- Document ID: US8771514B2
- Status: Granted
- Kind: B2
- Application number: 13/379,434
- Filed: 2010-06-21
- Published: 2012-04-26
- Granted: 2014-07-08
- Earliest claimed: 2009-06-26
- Assignees: Universidad Politecnica De Madrid
- Applicants: Alfonso Cobos De La Fuente
- Inventors: Alfonso Cobos De La Fuente
- Web page: https://patentgrep.com/patent/US8771514B2

## CPC

- B01D 29/46: of flat, stacked bodies
- B01D 29/15: arranged for inward flow filtration
- B01D 29/44: Edge filtering elements, i.e. using contiguous impervious surfaces
- B01D 29/68: with backwash arms, shoes or nozzles
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

The present invention relates to a filter pack formed by stacking rings, being used as a final element in multistage or single-stage filters. The filtration process is performed by consecutively separating the particles in suspension according to the thickness thereof in different areas.

## Claims

### Claim 1

A sequential filter pack for fluids comprising a set of superimposed disk-shaped rings with an annulus geometry, each of which has a plurality of circumferentially distributed grooves on its back and a plurality of projections on its front according to equal circular sectors until circumferentially covering the front of the ring; between these projections, each ring comprises radially arranged projections defining partitions (14) such that they give rise to alternating channels of increasing section (16) and channels of decreasing section (15), wherein each ring additionally comprises two (11, 13) sets of projections each of them formed by connecting arched ribs (11) forming a barrier of uniform height wherein the height of the set of arched ribs (13) closer to the center is greater than that of the outer arched ribs (11), and both (11, 13) sets of projections extend perimetrically such that an interconnecting circumferential channel (12) for interconnecting flow is defined between both sets of projections and wherein the heights of the partitions (14) are greater than the height of the remaining projections on the front
wherein the inner edge of the rings comprises a bevel for separating the rings of the pack and all the sharp edges are rounded.

### Claim 2 (depends on 1)

The sequential filter pack for fluids according to claim 1, wherein the connecting arched ribs (11) form a barrier of uniform height, and when several sets of projections formed by perimetrically extending arched ribs connected to one another are consecutively arranged, they are of uniform height with respect to one another and increasing as they advance towards the center of the ring.

### Claim 3 (depends on 1)

The sequential filter pack for fluids according to claim 1, wherein the projections formed by the final arched ribs (13), which have the greatest height among all the projections formed by arched ribs, are such that the arched ribs forming them are located in a position matching up with the inlet of the channels of decreasing diverging section (15).

### Claim 4 (depends on 1)

The sequential filter pack for fluids according to claim 1, wherein the projections giving rise to the channels of decreasing section (15) and channels of increasing section (16) have a maximum uniform height with respect to the height of the remaining projections.

### Claim 5 (depends on 1)

The sequential filter pack for fluids according to claim 1, wherein the circumferential grooves (21) of the back have a section selected from triangular, square, rectangular and curved shapes.