US 12,239,929 B2
Filter cartridge having air vent with restriction, assemblies, and methods
David B. Harder, Burnsville, MN (US); Kurt Joscher, Burnsville, MN (US); and Jacob L. Sanders, Minneapolis, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Appl. No. 17/281,903
Filed by Donaldson Company, Inc., Minneapolis, MN (US)
PCT Filed Sep. 23, 2019, PCT No. PCT/US2019/052458
§ 371(c)(1), (2) Date Mar. 31, 2021,
PCT Pub. No. WO2020/072225, PCT Pub. Date Apr. 9, 2020.
Claims priority of provisional application 62/742,060, filed on Oct. 5, 2018.
Prior Publication US 2021/0379515 A1, Dec. 9, 2021
Int. Cl. B01D 36/00 (2006.01); B01D 29/15 (2006.01); B01D 35/30 (2006.01)
CPC B01D 36/001 (2013.01) [B01D 29/15 (2013.01); B01D 35/30 (2013.01); B01D 2201/295 (2013.01); B01D 2201/316 (2013.01); B01D 2201/347 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A filter cartridge for filtering fuel or oil, the filter cartridge comprising:
(a) first and second opposite end caps;
(i) the first end cap including an inner end cap piece and an outer end cap piece secured together;
(b) a tubular extension of filter media defining an open interior volume downstream of the filter media; the filter media being secured to the inner end cap piece, outer end cap piece, and second end cap, and extending between the first and second end caps; and
(c) the first end cap having an air channel with a radial inlet and an outlet; the outlet being (c) circumferentially spaced from the inlet; the inlet being in communication with a volume upstream of the filter media; and the outlet being in communication with the open interior volume downstream of the filter media; the outlet being defined by the inner end cap piece;
(i) the channel having an average cross-sectional area no greater than 0.6 mm2 and a length between the inlet and outlet of at least 12 mm.