US 12,239,930 B2
Filter media with improved dust loading
Gregory S. Tronnes, Bloomington, MN (US); Robert M. Rogers, Minnetonka, MN (US); and Aflal Rahmathullah, Savage, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Appl. No. 17/598,585
Filed by Donaldson Company, Inc., Minneapolis, MN (US)
PCT Filed Mar. 27, 2020, PCT No. PCT/US2020/025467
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/198681, PCT Pub. Date Oct. 1, 2020.
Claims priority of provisional application 62/825,188, filed on Mar. 28, 2019.
Prior Publication US 2022/0152537 A1, May 19, 2022
Int. Cl. B01D 53/02 (2006.01); B01D 39/16 (2006.01); B01D 39/18 (2006.01)
CPC B01D 39/1623 (2013.01) [B01D 39/18 (2013.01); B01D 2239/0654 (2013.01); B01D 2239/069 (2013.01); B01D 2239/1233 (2013.01)] 20 Claims
OG exemplary drawing
 
1. Filter media comprising:
a downstream layer of filter material in a corrugated configuration defining peaks and valleys, wherein the downstream layer of filter material has a capture efficiency of at least 10% and a mean corrugation depth of less than 2.0 mm; and
an upstream layer of fibers extending across the peaks of the downstream layer of filter material, the upstream layer of fibers having a mean fiber diameter of at least 10 microns, and the upstream layer of fibers has less than 10% solidity.