# US 11,364,458 B2 · Rectangular filters, assembly and method for filtration

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- Number: US 11,364,458 B2
- Document ID: US11364458B2
- Status: Granted
- Kind: B2
- Application number: 15/901,580
- Filed: 2018-02-21
- Published: 2018-08-23
- Granted: 2022-06-21
- Earliest claimed: 2017-02-22
- Assignees: Filtration Technology Corporation
- Applicants: Filtration Technology Corporation
- Inventors: James D. Harris; Tyler J. Johnson; Christopher D. Wallace
- Web page: https://patentgrep.com/patent/US11364458B2

## CPC

- B01D 46/0031: {with collecting, draining means}
- B01D 19/0031: {by filtration}
- B01D 29/15: arranged for inward flow filtration
- B01D 29/21: with corrugated, folded or wound sheets
- B01D 29/23: arranged for outward flow filtration
- B01D 29/52: in parallel connection
- B01D 45/02: by utilising gravity
- B01D 46/0008: {Two or more filter elements not fluidly connected positioned in the same housing}
- B01D 46/2403: {characterised by the physical shape or structure of the filtering element}
- B01D 46/4227: {Manipulating filters or filter elements, e.g. handles or extracting tools}
- B01D 46/521: {using folded, pleated material}
- B01D 46/58: connected in parallel
- B01D 50/20: Combinations of devices covered by groups B01D45/00 and B01D46/00
- B01D 2201/02: Filtering elements having a conical form
- B01D 2201/0438: mounted substantially vertically on plates at the lower side of the filter elements
- B01D 2201/0446: suspended from plates at the upper side of the filter elements
- B01D 2201/24: Tools used for the removal of filters
- B01D 2201/291: End caps
- B01D 2201/605: Square or rectangular
- B01D 2275/201: Conical shape
- B01D 2275/205: Rectangular shape
- 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 discloses a rectangular shaped filter and coalescer elements and a vessel that houses a plurality of such rectangular shaped elements. Greater filtration or separation efficiency is provided due to increased number and alignment of rectangular shaped filter elements in the vessel. The rectangular shaped filter elements are also easy to replace.

## Claims

### Claim 1

A filter assembly for filtering liquids, comprising:
a) a filter housing;
b) a liquid inlet to the filter housing;
c) a separation plate sealably secured to the inner circumference of the filter housing, wherein said separation plate has a plurality of openings and a plurality of perforated supports mounted thereon corresponding to each of the openings;
d) a plurality of rectangular shaped filters of pleated filter media enclosed in said filter housing mounted above the separation plate, wherein each of said rectangular shaped filters having a central void surrounded by the inner surface of pleated filter media, a solid top cap, a bottom cap having an opening located therein corresponding to the central void of said rectangular shaped filters to communicate with the central void in the filter media, wherein each of the central voids that extends from the solid top cap to the bottom cap of the rectangular shaped filter surrounds each of the perforated supports extending from the separation plate;
e) the bottom cap of each said rectangular shaped filter is removably mounted on the separation plate with a sealing member that avoids liquid bypass, wherein the separation plate having the openings to correspond to the openings in the bottom caps, wherein such that a liquid to be filtered passes from external surface of the pleated filter media into the central void of the rectangular shaped filters and becomes filtered clean liquid, and the filtered clean liquid passes through the openings on the bottom caps into the corresponding openings in the separation plate;
f) a chamber that is provided in the filter housing below the separation plate to collect the filtered clean liquid; and
g) a clean liquid outlet from the filter housing beneath the separation plate.

### Claim 2 (depends on 1)

The filter assembly of claim 1, wherein the rectangular shaped filter has a cross-sectional area increasing toward the bottom of the filter generally in the shape of a trapezoid.

### Claim 3 (depends on 1)

The filter assembly of claim 1, further comprising a handle on the top cap of each said rectangular shaped filters.

### Claim 4 (depends on 1)

The filter assembly of claim 1 wherein the filter media is selected from the group of natural or synthetic pleated media.

### Claim 5 (depends on 1)

The filter assembly of claim 1 wherein the filter housing is generally cylindrical and the separation plate is generally circular mounted inside the housing.

### Claim 6 (depends on 1)

The filter assembly of claim 1, wherein the filter assembly is operable under pressure wherein the range of differential pressure is from 13.78 to 241.31 kPa (2 to 35 psid).

### Claim 7 (depends on 1)

The filter assembly of claim 1, wherein the filtration efficiency is increased by at least 58% comparing to filter assemblies with a diameter of 18 inches or more.