	US 12,233,366 B2
	Liquid filtration media containing melt-blown fibers
Mike J. Madsen, Chaska, MN (US); and Brian D. Babcock, Columbus, TN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Filed by Donaldson Company, Inc., Minneapolis, MN (US)
Filed on Jun. 28, 2021, as Appl. No. 17/360,859.
Application 17/360,859 is a continuation of application No. 14/238,436, abandoned, previously published as PCT/US2012/050176, filed on Aug. 9, 2012.
Claims priority of provisional application 61/523,068, filed on Aug. 12, 2011.
Prior Publication US 2021/0322906 A1, Oct. 21, 2021
Int. Cl. B01D 39/16 (2006.01); B01D 39/18 (2006.01); F02M 37/22 (2019.01); B01D 24/00 (2006.01); B01D 35/00 (2006.01)

CPC B01D 39/1607 (2013.01) [B01D 39/16 (2013.01); B01D 39/1623 (2013.01); B01D 39/18 (2013.01); F02M 37/22 (2013.01); B01D 24/007 (2013.01); B01D 35/005 (2013.01); B01D 2239/0216 (2013.01); B01D 2239/1233 (2013.01)]

12 Claims

1. A filter for filtering liquid fuels, the filter comprising:

filter media configured and arranged for placement in a liquid fuel stream, the filter media comprising an upstream media layer and a downstream media layer, the upstream media layer comprising a mixture of:

a) media fiber; and

b) scaffold fiber having an average diameter greater than the media fiber;

wherein the upstream media layer has a mean flow pore size of less than 20 microns and is smaller than the mean flow pore size of the downstream media layer,

wherein the mode pore size of the upstream media layer is from 10 to 50 microns and is at least 40 percent greater than the mode pore size of the downstream media layer; and

wherein the media fiber and scaffold fiber both are melt-blown fibers; and

the downstream media layer comprising cellulose.