Patent ID: 11944925
Assignee: DONALDSON COMPANY, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 0:
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.