Round Filter Element, in Particular for Gas Filtration

• US 20190308126A1
• Filed: 04/17/2019
• Published: 10/10/2019
• Est. Priority Date: 10/17/2016
• Status: Active Grant

• Current Assignee: Mann+Hummel GmbH (Hummel Familien-Beteiligungsgesellschaft mbH + Co. KG)
• Original Assignee: Mann+Hummel GmbH (Hummel Familien-Beteiligungsgesellschaft mbH + Co. KG)
• Inventors: Fritzsching, Torsten, Neef, Pascal, Hasenfratz, Robert, Wittmers, Christoph
• Granted Patent: US 10,946,324 B2
• Time in Patent Office: Days
• CPC Class Codes: B01D 2265/026 with means for avoiding false mounting
• CPC Class Codes: B01D 2271/027 Radial sealings
• CPC Class Codes: B01D 2275/201 Conical shape
• CPC Class Codes: B01D 2275/208 Oval shape
• CPC Class Codes: B01D 2279/60 for the intake of internal combustion engines or turbines intake systems for vehicles comprising filters F02M35/024
• CPC Class Codes: B01D 46/0005 Mounting of filtering elements within casings, housings or frames B01D46/2422 takes precedence
• CPC Class Codes: B01D 46/121 V-type arrangements
• CPC Class Codes: B01D 46/2411 Filter cartridges
• CPC Class Codes: B01D 46/2414 End caps including additional functions or special forms
• CPC Class Codes: B01D 46/521 using folded, pleated material
• CPC Class Codes: F02M 35/0245 Pleated, folded, corrugated filter elements, e.g. made of paper

Abstract

A round filter element is provided with an elongate filter medium body with a wall structure flowed through by a fluid to be purified in a flow direction radially relative to a longitudinal axis of the filter medium body. A seal support for a sealing element is arranged adjacent to a radially outwardly positioned outer wall of the wall structure of the filter medium body and adjacent to an end face of the filter medium body. The seal support has across a major portion of its circumference a constant radial spacing relative to the outer wall of the wall structure of the filter medium body. The seal support has at least one radially inwardly oriented indentation located at a longitudinal side of the filter medium body and provided with a reduced radial spacing relative to the outer wall of the wall structure of the filter medium body.

Claims

1. A round filter element comprising:

a filter medium body comprising a wall structure configured to be flowed through by a fluid to be purified in a flow direction radially relative to a longitudinal axis of the filter medium body, the filter medium body comprising an elongate cross section shape;

a seal support configured to support a sealing element, wherein the seal support is arranged adjacent to a radially outwardly positioned outer wall of the wall structure of the filter medium body and adjacent to a first end face of the filter medium body;

the seal support comprising, across a major portion of a circumference of the seal support, a constant radial spacing relative to the outer wall of the wall structure of the filter medium body;

the seal support comprising at least one radially inwardly oriented indentation with a reduced radial spacing relative to the outer wall of the wall structure of the filter medium body, wherein the at least one radially inwardly oriented indentation of the seal support is located at a first longitudinal side of the filter medium body.

2. The round filter element according to claim 1, wherein the seal support comprises a receiving groove configured to receive the sealing element, wherein the receiving groove comprises, in a region of the at least one radially inwardly oriented indentation, a reduced radial spacing relative to the outer wall of the wall structure of the filter medium body compared to a radial spacing of the receiving groove relative to the outer wall of the wall structure of the filter medium body in regions outside of the region of the at least one radially inwardly oriented indentation.

3. The round filter element according to claim 2, wherein the filter medium body comprises a second longitudinal side and wherein the at least one radially inwardly oriented indentation includes a first indentation arranged at the first longitudinal side and further includes a second indentation arranged at the second longitudinal side.

4. The round filter element according to claim 1, wherein the outer wall of the wall structure of the filter medium body in the region of the at least one radially inwardly oriented indentation is embodied without a radial constriction.

5. The round filter element according to claim 1, wherein a cross section surface of the filter medium body tapers from the first end face to an oppositely positioned second end face.

6. The round filter element according to claim 1, wherein a cross section surface of the filter medium body tapers in a direction of the longitudinal axis.

7. The round filter element according to claim 1, further comprising a support grid arranged at the wall structure of the filter medium body.

8. The round filter element according to claim 7, wherein the support grid is arranged at the outer wall of the wall structure.

9. The round filter element according to claim 7, wherein the support grid is arranged at the inner wall of the wall structure.

10. The round filter element according to claim 1, wherein the filter medium body is a folded filter comprising filter folds extending at least approximately in the flow direction of the fluid.

11. A filter device comprising:

a filter housing;

a round filter element comprising;

a filter medium body comprising a wall structure configured to be flowed through by a fluid to be purified in a flow direction radially relative to a longitudinal axis of the filter medium body, the filter medium body comprising an elongate cross section shape;

a seal support configured to support a sealing element, wherein the seal support is arranged adjacent to a radially outwardly positioned outer wall of the wall structure of the filter medium body and adjacent to a first end face of the filter medium body, wherein the seal support comprises, across a major portion of a circumference of the seal support, a constant radial spacing relative to the outer wall of the wall structure of the filter medium body, wherein the seal support comprises at least one radially inwardly oriented indentation with a reduced radial spacing relative to the outer wall of the wall structure of the filter medium body, wherein the at least one radially inwardly oriented indentation of the seal support is located at a longitudinal side of the filter medium body;

wherein the filter housing is configured to receive the round filter element.

12. The filter device according to claim 11, wherein the filter housing comprises a filter base housing and an attachable housing cover, wherein a connecting element connecting the housing cover to the filter base housing is guided in the filter medium body through the at least one radially inwardly oriented indentation.