US 11,944,925 B2
Liquid filter arrangement; components; and, methods
Brian Mandt, Shakopee, MN (US); Brent Gulsvig, Faribault, MN (US); and John Hacker, Edina, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Filed by Donaldson Company, Inc., Bloomington, MN (US)
Filed on Dec. 22, 2021, as Appl. No. 17/559,689.
Application 17/559,689 is a continuation of application No. 16/692,080, filed on Nov. 22, 2019, granted, now 11,207,621.
Application 16/692,080 is a continuation of application No. 15/686,423, filed on Aug. 25, 2017, granted, now 10,493,386, issued on Dec. 3, 2019.
Application 15/686,423 is a continuation of application No. 14/471,190, filed on Aug. 28, 2014, granted, now 9,751,033, issued on Sep. 5, 2017.
Application 14/471,190 is a continuation of application No. 13/616,628, filed on Sep. 14, 2012, granted, now 8,821,724, issued on Sep. 2, 2014.
Application 13/616,628 is a continuation of application No. 12/316,812, filed on Dec. 16, 2008, granted, now 8,535,530, issued on Sep. 17, 2013.
Application 12/316,812 is a continuation of application No. 11/600,011, filed on Nov. 14, 2006, granted, now 7,628,280, issued on Dec. 8, 2009.
Claims priority of provisional application 60/737,441, filed on Nov. 15, 2005.
Prior Publication US 2022/0249990 A1, Aug. 11, 2022
Int. Cl. B01D 35/30 (2006.01); B01D 27/08 (2006.01); B01D 29/15 (2006.01); B01D 35/147 (2006.01); B01D 35/34 (2006.01)
CPC B01D 35/30 (2013.01) [B01D 27/08 (2013.01); B01D 29/15 (2013.01); B01D 35/147 (2013.01); B01D 35/34 (2013.01); B01D 2201/304 (2013.01); B01D 2201/4046 (2013.01); B01D 2201/4076 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A liquid filter arrangement comprising:
(a) a filter head including:
(i) a first head portion including a liquid flow inlet and a liquid flow outlet,
(ii) a second head portion comprising an outer ring having an outer surface with a first threaded section and a second seal surface;
(A) the first threaded section being axially positioned between the second seal surface and the first head portion;
(iii) a central projection positioned on the first head portion surrounded by and spaced radially inwardly from, the second head portion;
(A) the central projection defining an inwardly directed cartridge seal surface; and,
(b) a liquid filter member comprising:
(i) an outer shell having a sidewall defining an interior and an open end;
(A) the outer shell being threadably mounted on the filter head with a seal ring positioned between the liquid filter member and the second seal surface of the second head portion; and,
(ii) a filter cartridge positioned within the interior of the outer shell:
(A) the filter cartridge comprising media extending between first and second end caps;
(B) the first end cap being an open end cap with a central aperture and including an axially outwardly projecting seal mount thereon; and
(C) the filter cartridge including a seal mounted on the axially outwardly projecting seal mount and sealed against the inwardly directed cartridge seal surface of the central projection of the first head portion;
(c) the first and second head portions being metal; and,
(d) the central projection being plastic; and
(e) the central projection includes an outer surface portion that is radially opposite the inwardly directed cartridge seal surface and has a plurality of axial projections on the outer surface portion.