Filter assembly

Patent metadata

Field	Value
Publication number	US-10512867-B2
Application number	US-201715485768-A
Country	US
Kind code	B2
Filing date	Apr 12, 2017
Priority date	Apr 12, 2016
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

A filter assembly has a main filter element disposed in a filter housing and provided with an end disk with a first sealing element that seals the main filter element relative to the filter housing. A secondary filter element is disposed in the filter housing and is provided with an end disk with a second sealing element that seals the secondary filter element relative to the filter housing. The end disk of the secondary filter element is arranged relative to an axial direction of the filter assembly between the end disk of the main filter element and the filter housing. The end disk of the secondary filter element is arranged inside a flow cross section of a fluid outlet of the filter housing. The end disks of the main filter element and of the secondary filter element are axially supported on each other at least over sections thereof.

First claim

What is claimed is:

1. A filter assembly comprising:
a filter housing comprising:
a fluid outlet;
a support structure comprising:
an annular tubular sealing section arranged in an interior of the filter housing and circumferentially surrounding the fluid outlet, annular tubular sealing section projecting axially inwardly from the filter housing into the interior;

a main filter element disposed in the filter housing and comprising
an end disk with a first sealing element projecting axially outwardly from the end disk in an axial direction away from the main filter element;
wherein the first sealing element seals radially against the annular tubular sealing section of the filter housing;
wherein annular tubular sealing section of the filter housing projects axially inwardly from the filter housing towards the end disk of the main filter element to radially contact against and radially seal against the first sealing element, sealing the main filter element relative to the filter housing;

a secondary filter element disposed in the interior of the filter housing and comprising:
a secondary element end disk with a second sealing element that seals radially against a radially inner surface of the annular tubular sealing section of the filter housing, sealing the secondary filter element relative to the filter housing;

wherein the secondary element end disk is arranged relative to the axial direction of the filter assembly between the end disk of the main filter element and the support structure of the filter housing;
wherein the secondary element end disk is arranged inside a flow cross section of the fluid outlet of the filter housing;
wherein the end disk of the main filter element and the secondary element end disk contact against each other axially and support against each other at least over sections thereof in the axial direction.

2. The filter assembly according to claim 1 , wherein
the first sealing element seals the main filter element radially relative to the filter housing in a first sealing direction and
wherein the second sealing element seals the secondary filter element radially relative to the filter housing in a second sealing direction.

3. The filter assembly according to claim 2 , wherein
the first sealing direction of the first sealing element is oriented opposite to the second sealing direction of the second sealing element.

4. The filter assembly according to claim 1 , wherein
the support structure of the filter housing comprises
a plurality of support ribs arranged on the radially inner surface of the annular tubular sealing section of the filter housing, the plurality of support ribs projecting radially inwardly from the radially inner surface of the annular tubular sealing section and positioned to contact against an axially outer side of the secondary element end disk; and

wherein the secondary element end disk is arranged axially between the end disk of the main filter element and the plurality of support ribs.

5. The filter assembly according to claim 4 , wherein
the plurality of support ribs project radially into the flow cross section of the fluid outlet of the filter housing.

6. The filter assembly according to claim 1 , wherein
the end disk of the main filter element comprises
a first circumferentially extending rib that projects axially outwardly from the end disk of the main filter element to contact against an be supported on the secondary element end disk.

7. The filter assembly according to claim 6 , wherein
the first circumferentially extending rib has breaks.

8. The filter assembly according to claim 1 , wherein
the secondary element end disk comprises
a second circumferentially extending rib that projects axially outwardly from the secondary element end disk to contact against and be supported on the end disk of the main filter element.

9. The filter assembly according to claim 8 , wherein
the second circumferentially extending rib has breaks.

10. The filter assembly according to claim 8 , wherein a first circumferentially extending rib contacts directly against the second circumferentially extending rib.

11. The filter assembly according to claim 10 , wherein
the first circumferentially extending rib or the second circumferentially extending rib has breaks.

12. The filter assembly according to claim 10 , wherein
the first circumferentially extending rib and the second circumferentially extending rib have breaks.

13. The filter assembly according to claim 1 , wherein
the secondary filter element is arranged outside of an interior of the main filter element.

14. The filter assembly according to claim 1 , wherein
the second sealing element is arranged radially inside of the first sealing element.

Assignees

• Mann & Hummel Gmbh

Inventors

• DONAUER Nadine

Classifications

• B01D2275/208

  Oval shape · CPC title

• B01D46/2411 Primary

  Filter cartridges · CPC title

• B01D2271/027

  Radial sealings · CPC title

• F02M35/0201

  Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof · CPC title

• B01D46/0008

  Two or more filter elements not fluidly connected positioned in the same housing · CPC title