Filter element having filter bellows

Patent metadata

Field	Value
Publication number	US-10384158-B2
Application number	US-201615160817-A
Country	US
Kind code	B2
Filing date	May 20, 2016
Priority date	Nov 20, 2013
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A filter element for filtering a fluid, including: a filter bellows made of a filter medium folded into zig-zag-shaped pleats along fold edges, each pleat extending between opposing end edges of the filter bel-lows, and being laterally sealed at the end edges by means of at least one sealant track or a sideband; wherein the filter bellows includes a first element section; and a second element section, which include each on opposing end faces end edge surfaces and that substantially run parallel to one another, wherein, from one element section to another element section, at least one of the end edge surfaces changes direction.

First claim

What is claimed is:

1. A filter element for filtering a fluid, comprising:
a filter bellows made of a filter medium folded into a plurality of zig-zag-shaped pleats along pleat fold edges, each pleat fold edge extending from a first end edge of the pleat to an opposite second end edge of the pleat;
wherein the filter bellows is a continuous sheet of filter medium without interruptions;
wherein each pleat has:
a first fold edge on a raw fluid side of the filter bellows, and
a second fold edge on a clean fluid side of the filter medium;
wherein the first and second folded edges each run from a first end edge of the pleat to an opposite second end edge of the pleat;

wherein, in the filter bellows:
the first fold edges of the plurality of zig-zag-shaped pleats forms an raw fluid flow face of the filter bellows, through which fluid enters the filter bellows; and
the second fold edges of the plurality of zig-zag-shaped pleats forms a clean fluid flow face of the filter bellows, through which filtered fluid exists the filter bellows;
wherein the first end edges of the plurality of zig-zag-shaped pleats forms a first end edge surface of the filter bellows;
wherein the opposite second fold edges of the plurality of zig-zag-shaped pleats forms a second end edge surface of the filter bellows;
wherein the first fold edges of the plurality of zig-zag-shaped pleats runs from the first end edge surface of the filter bellows to the second end edge surface of the filter bellows;
wherein the second fold edges of the plurality of zig-zag-shaped pleats runs from the first end edge surface of the filter bellows to the second end edge surface of the filter bellows;
wherein the first end edge surface and the second end edge surface each run from the raw fluid flow face to the clean fluid flow face of the filter bellows;

wherein the filter bellows of the continuous sheet of filter medium has:
a first filter bellows section having a first set of zig-zag-shaped pleats, arranged adjacently to each other;
a second first filter bellows section having a second set of zig-zag-shaped pleats, arranged adjacently to each other;
at least one sealant track or a sideband, laterally sealing the plurality of zig-zag-shaped pleats at the first and second end edges;

wherein the first end edge surface and the second end edge surface are substantially run parallel to one another;
wherein from the first filter bellows section to the second filter bellows section, at least one of the end edge surfaces changes direction;
wherein the change of direction of at least one end edge surface is a convex curved section, as seen from the outside of the filter bellows.

2. The filter element according to claim 1 , wherein
the change of direction of at least an end edge surface comprises consecutive opposite curved sections.

3. The filter element according to claim 2 , wherein
a continuous transition of an end edge surface of an element section via an end edge surface of a subsequent element section to an end edge surface of a subsequent element section is formed.

4. The filter element according to claim 1 , wherein
on the circumference of filter bellows a circumferential seal is provided.

5. The filter element according to claim 1 , wherein
a circumferential seal formed as a congruent foamed seal on the filter bellows is provided.

6. The filter element according to claim 1 , wherein
the circumferential seal is arranged on end edges and side edges.

7. The filter element according to claim 1 , wherein
the filter medium is a cellulose filter medium.

8. A filter element for filtering a fluid, comprising:
a filter bellows made of a filter medium folded into a plurality of zig-zag-shaped pleats along pleat fold edges, each pleat fold edge extending from a first end edge of the pleat to an opposite second end edge of the pleat;
wherein the filter bellows is a continuous sheet of filter medium without interruptions;
wherein each pleat has:
a first fold edge on a raw fluid side of the filter bellows, and
a second fold edge on a clean fluid side of the filter medium;
wherein the first and second folded edges each run from a first end edge of the pleat to an opposite second end edge of the pleat;

wherein, in the filter bellows:
the first fold edges of the plurality of zig-zag-shaped pleats forms an raw fluid flow face of the filter bellows, through which fluid enters the filter bellows; and
the second fold edges of the plurality of zig-zag-shaped pleats forms a clean fluid flow face of the filter bellows, through which filtered fluid exists the filter bellows;
wherein the first end edges of the plurality of zig-zag-shaped pleats forms a first end edge surface of the filter bellows;
wherein the opposite second fold edges of the plurality of zig-zag-shaped pleats forms a second end edge surface of the filter bellows;
wherein the first fold edges of the plurality of zig-zag-shaped pleats runs from the first end edge surface of the filter bellows to the second end edge surface of the filter bellows;
wherein the second fold edges of the plurality of zig-zag-shaped pleats runs from the first end edge surface of the filter bellows to the second end edge surface of the filter bellows;
wherein the first end edge surface and the second end edge surface each run from the raw fluid flow face to the clean fluid flow face of the filter bellows;

wherein the filter bellows of the continuous sheet of filter medium has:
a first filter bellows section having a first set of zig-zag-shaped pleats, arranged adjacently to each other;
a second first filter bellows section having a second set of zig-zag-shaped pleats, arranged adjacently to each other;
at least one sealant track or a sideband, laterally sealing the plurality of zig-zag-shaped pleats at the first and second end edges;

wherein the first end edge surface and the second end edge surface are substantially run parallel to one another;
wherein from the first filter bellows section to the second filter bellows section, at least one of the end edge surfaces changes direction;
wherein the filter bellows comprises at least three element sections;
wherein a middle element section of the at least three element sections has a concave curved section subsequent to a convex curved section on at least one of the end edge surfaces.

9. The filter element according to claim 8 , wherein
on the circumference of the filter bellows a circumferential seal is provided, whose average width in the area of the convex and/or concave curved sections of the end edge surfaces is wider than outside of the sections.

10. The filter element according to claim 8 , wherein
on the circumference of filter bellows a circumferential seal is provided.

11. The filter element according to claim 8 , wherein
the circumferential seal is arranged on end edges and side edges.

12. The filter element according to claim 8 , wherein
the filter medium is a cellulose filter medium.

13. A filter element for filtering a fluid, comprising:
a filter bellows made of a filter medium folded into a plurality of zig-zag-shaped pleats along pleat fold edges, each pleat fold edge extending from a first end edge of the pleat to an opposite second end edge of the pleat;
wherein the filter bellows is a continuous sheet of filter medium without interruptions;
wherein each pleat has:
a first fold edge on a raw fluid side of the filter bellows, and
a second fold edge on a clean fluid side of the filter medium;
wherein the first and second folded edges each run from a first end edge of the pleat to an opposite second end edge of the pleat;

wherein, in t

Assignees

• Mann & Hummel Gmbh

Inventors

• Pflueger Frank
• Wagner Fabian
• Thalmann Christian
• Roesgen André
• Hasenfratz Robert
• Schmid Daniel
• Dirnberger Timo

Classifications

• B01D46/0004

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

• B01D46/523

  with means for maintaining spacing between the pleats or folds · CPC title

• B01D46/521 Primary

  using folded, pleated material · CPC title

• F02M35/0201

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

• B01D39/18

  the material being cellulose or derivatives thereof ({cork or peat B01D39/1646} ; making filter paper D21F11/14) · CPC title