# US 10,118,117 B2 · Air filter with improved performance or positioning

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- Number: US 10,118,117 B2
- Document ID: US10118117B2
- Status: Granted
- Kind: B2
- Application number: 14/895,181
- Filed: 2014-06-05
- Published: 2016-04-28
- Granted: 2018-11-06
- Earliest claimed: 2013-06-06
- Assignees: Cummins Filtration IP, Inc.
- Applicants: Cummins Filtration IP, Inc.
- Inventors: Scott W. Schwartz; Anthony Barreteau; Emmanuel Page
- Web page: https://patentgrep.com/patent/US10118117B2

## CPC

- B01D 46/64: arranged concentrically or coaxially
- B01D 46/2414: {End caps including additional functions or special forms}
- B01D 46/521: {using folded, pleated material}
- B01D 2265/024: Mounting aids
- B01D 2271/027: Radial sealings
- 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

Radial seal filter assemblies and filter cartridges are described. According to various embodiments, a filter includes a housing that extends along an axis between first and second axial ends. A primary filter element is disposed in the housing and axially extends between first and second axial ends that respectively are adjacent the first and second axial ends of the housing, the primary filter element has a hollow interior and a first axial length. A secondary filter element is disposed in the hollow interior of the primary filter element, the secondary filter element having a second axial length, the second axial length being longer than the first axial length of the primary filter element. The filter further includes an end cap disposed on the second axial end of the primary filter element.

## Claims

### Claim 1

A filter comprising:
a housing that extends along an axis between first and second axial ends, the housing comprising a main body and a cover removably secured to the main body in a closed position;
a primary filter element that is disposed in the housing and axially extends between first and second axial ends that respectively are adjacent the first and second axial ends of the housing, the primary filter element has a hollow interior, the primary filter element has a first axial length;
a secondary filter element disposed in the hollow interior of the primary filter element, the secondary filter element has a second axial length, the second axial length is longer than the first axial length of the primary filter element, the secondary filter element rests against the cover when the cover is in the closed position; and
an end cap disposed on the second axial end of the primary filter element.

### Claim 2 (depends on 1)

The filter of claim 1, wherein the end cap includes an opening and the secondary filter element extends through the opening.

### Claim 3 (depends on 1)

The filter of claim 1, wherein the cover includes a cylindrical flange that provides an axial sealing surface for the end cap.

### Claim 4 (depends on 1)

The filter of claim 1, wherein the cover includes a transparent or substantially transparent section that allows an operator to visually see into the filter.

### Claim 5 (depends on 1)

The filter of claim 1, wherein the end cap is made of a hard polymer that is not polyurethane.

### Claim 6

A filter comprising:
a housing that extends along an axis between first and second axial ends, the housing comprising a main body and a cover removably secured to the main body in a closed position;
a primary filter element that is disposed in the housing and axially extends between first and second axial ends that respectively are adjacent the first and second axial ends of the housing, the primary filter element has a hollow interior, the primary filter element has a first axial length;
a secondary filter element disposed in the hollow interior of the primary filter element, the secondary filter element has a second axial length, the second axial length is longer than the first axial length of the primary filter element,
the secondary filter element comprising a secondary filter end cap that rests against the cover when the cover is in the closed position; and
an end cap disposed on the second axial end of the primary filter element.

### Claim 7 (depends on 6)

The filter of claim 6, wherein the secondary filter end cap and the cover include mating detents that retain the secondary filter element in an aligned position when the cover is in the closed position.