Foldable filter arrangement consisting of a plurality of individual filter elements

Patent metadata

Field	Value
Publication number	US-12083467-B2
Application number	US-202117546078-A
Country	US
Kind code	B2
Filing date	Dec 9, 2021
Priority date	Dec 9, 2020
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

The invention relates to a filter arrangement for cleaning an air stream having at least three filter elements, wherein each filter element has a bellows made of pleated filter medium, wherein the filter elements are arranged in series and any two adjacent filter elements are connected to one another by means of a connecting tab. According to the invention, a fold run-out of all end folds of all bellows is oriented in a particular direction, the connecting tabs are of two different embodiments and the different embodiments of the connecting tabs are arranged alternatingly when viewed in a longitudinal direction of the filter arrangement. Not only is a simple installation of the filter elements in a filter holder thus facilitated but also a defined seating of the filter elements in the filter holder is ensured.

First claim

What is claimed is:

1. A filter arrangement for cleaning an air stream, the filter arrangement comprising at least three filter elements, wherein each filter element of the at least three filter elements includes a bellows made of pleated filter medium, wherein:
the at least three filter elements are arranged in series,
a fold run-out of all end folds of the bellows is oriented in a particular direction, and
connecting tabs connecting any two adjacent filter elements are of two different embodiments and the different embodiments of the connecting tabs are arranged alternatingly when viewed in a longitudinal direction of the filter arrangement, wherein, when viewed in longitudinal section, a first embodiment of the connecting tabs has an inverted V shape and a second embodiment of the connecting tabs has a U shape.

2. The filter arrangement according to claim 1 , wherein the connecting tabs have a reduced cross-section at their intended fold edges.

3. The filter arrangement according to claim 1 , wherein the connecting tabs are made of a filter material.

4. The filter arrangement according to claim 3 , wherein the filter material is an edging strip made of non-woven material.

5. The filter arrangement according to claim 3 , wherein the filter material has anti-allergenic and/or anti-viral properties.

6. The filter arrangement according to claim 1 , wherein the filter medium has a multi-layer design that includes at least one functional layer.

7. The filter arrangement according to claim 1 , wherein each filter element of the at least three filter elements has a cuboid shape.

8. The filter arrangement according to claim 1 , wherein all filter elements of the at least three filter elements are identical in structure.

Assignees

• Freudenberg Carl Kg

Inventors

• Beisel Tobias
• Oelsner Alexander
• Krambs Christoph
• Zimmermann Peter
• Karasu Emre
• Capuani Peter

Classifications

• B01D46/4236

  Reducing noise or vibration emissions · CPC title

• B01D46/406

  of stacked bodies · CPC title

• B01D46/2403

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

• B01D46/0016

  Folded frame or housing constructions · CPC title

• B01D46/0008

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