US 12,330,108 B2
Filter assembly
Mark A. Sala, Lino Lakes, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Filed by Donaldson Company, Inc., Bloomington, MN (US)
Filed on Jun. 16, 2022, as Appl. No. 17/841,940.
Application 17/841,940 is a continuation of application No. 16/650,338, granted, now 11,364,462, previously published as PCT/US2018/052691, filed on Sep. 25, 2018.
Claims priority of provisional application 62/562,917, filed on Sep. 25, 2017.
Prior Publication US 2022/0305424 A1, Sep. 29, 2022
Int. Cl. B01D 46/52 (2006.01)
CPC B01D 46/526 (2013.01) [B01D 46/527 (2013.01); B01D 2275/206 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A filter assembly comprising:
a first sheet of filter media and a second sheet of filter media mutually defining a first plurality of flutes, a first flow face on a first end of the filter assembly, and a second flow face on an opposite, second end of the filter assembly,
wherein each of the first plurality of flutes defines a distance from the first flow face to the second flow face and each of the first plurality of flutes defines a flute opening at the first flow face and a flute closure towards the second flow face, where a first flute of the first plurality of flutes defines a first flute distance and a second flute of the first plurality of flutes defines a second flute distance, and wherein the first flute distance and the second flute distance differ by greater than 2 mm and the first flow face extends in an axial direction and the first flow face defines multiple planes.