Filter insert and method for manufacturing a filter insert

Patent metadata

Field	Value
Publication number	US-10040015-B2
Application number	US-201615052041-A
Country	US
Kind code	B2
Filing date	Feb 24, 2016
Priority date	Mar 3, 2015
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

A filter insert for installation in a housing, having at least one substantially hollow cylindrical filter element for separating liquid from aerosol; and at least one covering element designed to cover an axial end region of the filter element; wherein at least one of the the at least one covering element is formed from at least one metal sheet and connected with the filter element with at least one mechanical connection; wherein the mechanical connection between the at least one covering element and the filter element is formed solely by a structure of the at least one covering element produced through deforming or reforming the at least one covering element; wherein the structure of the at least one covering element is configured to clamp the filter element to the at least one covering element.

First claim

The invention claimed is:

1. A filter insert for installation in a housing, comprising:
at least one substantially hollow cylindrical filter element for separating liquid from aerosol; and
at least one covering element designed to cover an axial end region of the filter element;
wherein at least one of the at least one covering element is formed from at least one metal sheet and connected with the filter element with at least one mechanical connection;
wherein the mechanical connection between the at least one covering element and the filter element is formed solely by a structure of the at least one covering element produced through deforming or reforming the at least one covering element;
wherein the structure of the at least one covering element is configured to clamp the filter element to the at least one covering element;
wherein the structure of the at least one covering element has at least one groove which is substantially U-shaped when seen in a section along a longitudinal axis of the filter insert and at least one radial covering element bead, which is arranged on one of two sides of the at least one groove;
wherein in a position of use of the filter insert:
the at least one groove receives the axial end region of at least one of the filter elements;
the bottom of the at least one groove abuts directly or indirectly against the axial end region of the filter element received in the groove and the two sides of the at least one groove extend parallel to a shell surface of the filter element received in the at least one groove; and
the at least one covering element bead clamps the filter element received in the at least one groove into the at least one groove in a manner secure from slipping;
wherein the covering element is connected to the filter element in a mechanical manner;

wherein the structure of the at least one covering element each has a respective covering element bead arranged on each of the two sides of the at least one groove, which covering element bead clamps the filter element received in the at least one groove into the at least one groove in a manner secure from slipping.

2. The filter insert according to claim 1 , wherein the covering element beads are arranged on mutually opposite regions for the sides of the at least one groove.

3. The filter insert according to claim 1 , wherein
when seen in a section transverse to the longitudinal axis of the filter insert, the at least one groove is formed in a substantially annular manner and the covering element bead or covering element beads encircle the entire circumference of the sides of the at least one groove.

4. The filter insert according to claim 1 , wherein
at least one metal support tube designed to support the filter element;
wherein the at least one groove is additionally formed to receive the support tube or at least one of several support tubes; and
wherein the support tube has at least one support tube bead, which is designed to interact with the covering element bead or covering element beads of the at least one groove such that the filter element clamps in the at least one groove, the support tube bead directly abutting one of the covering element beads, such that the beads engage with one another in a form locking manner.

5. The filter insert according to claim 1 , wherein
the axial end regions of at least two filter elements are received in the at least one groove, wherein the axial end regions of the respective filter elements are spaced apart from one another by at least one spacer configured as at least one insertion element, the at least one insertion element is arranged radially between the axial end regions of the of the respective filter elements.

6. The filter insert according to claim 1 , wherein
the filter element has a support tube for supporting the filter element arranged on an inner shell surface of the filter element;
wherein the filter element is two filter elements: a primary filter and a secondary filter;
wherein the at least one of the covering element is has a U-shaped groove for each of the filter elements; and
wherein the U-shaped groove directly or indirectly abuts respectively against an outer shell surface, the inner shell surface and a covering surface of the hollow cylindrical filter element associated therewith.

7. A method for manufacturing a filter insert according to claim 1 for installation in a housing, wherein
at least one hollow cylindrical filter element for separating a liquid from an aerosol is connected in a purely mechanical manner with at least one covering element designed to cover an axial end region of the filter element and formed from at least one metal sheet;
wherein the connection between the covering element and the filter element is provided solely through the deforming or reforming of the covering element;
wherein the covering element is deformed such that the filter element is clamped on the covering element.

8. The method according to claim 7 , wherein
the filter element is inserted into at least one U-shaped groove of the covering element; and
the covering element is connected with the filter element inserted into the groove, in that at least one respective covering element bead is pressed on both sides of the groove such that the covering element beads clamp the filter element in the groove.

9. The method according to claim 8 , wherein
the filter insert comprises two covering elements, wherein both covering elements are arranged on mutually opposite axial end regions of the filter element;
the filter element is respectively connected at each of its axial end regions with one of the covering elements; and
both of the covering elements are simultaneously connected with the filter element by means of a beading technique.

10. The method according to claim 9 , wherein
the filter element is wound about a metal support tube for supporting the filter element;
wherein the filter element is inserted with the support tube into the groove of the second covering element;
wherein the first covering element is placed on the axial end region of the filter element which is opposite the second covering element;
wherein through pressing of the covering element beads by means of the beading technique, the second covering element is connected with the filter element and the first covering element is connected with the filter element.

11. The method according to claim 10 , wherein
following the pressing of the covering element beads, a tube-shaped metal protective element configured as a grid-like perforated metal protective tube is arranged around the outer shell surface of the filter element facing away from the inner cavity of the filter insert for discharging the purified gas or for supplying the aerosol to be purified, or the outermost shell surface of the filter element furthest away from the inner cavity, and subsequently by the beading technique clamped on the outer shell surface of the filter element or on the outermost shell surface of the filter elements.

12. A filter insert installation in a housing, comprising:
at least one substantially hollow cylindrical filter element for separating liquid from aerosol; and
at least one covering element designed to cover an axial end region of the filter element;
wherein at least one of the at least one covering element is formed from at least one metal sheet and connected with the filter element with at least one mechanical connection;
wherein the mechanical connection between the at least one covering element and the filter element is formed solely by a structure of the at least one covering element produced through deforming or reforming the at least o

Assignees

• Mann & Hummel Gmbh

Inventors

• Dworatzek Klemens
• Evcuemen Goekhan

Classifications

• B01D46/003 Primary

  including coalescing means for the separation of liquid · CPC title

• B01D46/0004

  Details of removable closures, lids, caps or filter heads · CPC title

• B01D46/2403

  characterised by the physical shape or structure of the filtering element · CPC title

• B01D46/2414 Primary

  End caps including additional functions or special forms · CPC title

• B01D46/0001

  Making filtering elements · CPC title