US 12,083,467 B2
Foldable filter arrangement consisting of a plurality of individual filter elements
Tobias Beisel, Moerlenbach (DE); Alexander Oelsner, Mannheim (DE); Christoph Krambs, Heidelberg (DE); Peter Zimmermann, Abtsteinach (DE); Emre Karasu, Weinheim (DE); and Peter Capuani, Waldmichelbach (DE)
Assigned to CARL FREUDENBERG KG, Weinheim (DE)
Filed by Carl Freudenberg KG, Weinheim (DE)
Filed on Dec. 9, 2021, as Appl. No. 17/546,078.
Claims priority of application No. 20212692 (EP), filed on Dec. 9, 2020.
Prior Publication US 2022/0176296 A1, Jun. 9, 2022
Int. Cl. B01D 46/12 (2022.01); B01D 46/00 (2022.01); B01D 46/24 (2006.01); B01D 46/40 (2006.01); B01D 46/42 (2006.01); B01D 46/62 (2022.01)
CPC B01D 46/12 (2013.01) [B01D 46/0008 (2013.01); B01D 46/0016 (2013.01); B01D 46/2403 (2013.01); B01D 46/406 (2013.01); B01D 46/4236 (2013.01); B01D 46/62 (2022.01)] 8 Claims
OG exemplary drawing
 
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.