Liquid filter arrangement; components; and, methods

Patent metadata

Field	Value
Publication number	US-11944925-B2
Application number	US-202117559689-A
Country	US
Kind code	B2
Filing date	Dec 22, 2021
Priority date	Nov 15, 2005
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

Liquid filter arrangements are described and shown. The arrangements generally include a filter member comprising a shell enclosing a filter cartridge. Unique features for interface between the enclosed filter cartridge and the shell are provided. Also provided are unique features for interaction between the cartridge and a filter head, in use.

First claim

What is claimed is:

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.

2. A liquid filter member comprising:
(a) an outer shell defining interior and having an open end, a closed end and a sidewall;
(i) the outer shell defining an inwardly directed lip, adjacent the open end;

(b) a top plate positioned within the interior of the outer shell adjacent the lip; the top plate including a first region having inner threads and a second unthreaded region; the first region being positioned adjacent the lip;
(i) the top plate first region includes an outer surface and a tip with a beveled surface;
(ii) the beveled surface extending at an angle within the range of 40° to 70° inclusive, relative to the outer surface of the top plate first region; and
(iii) the lip of the shell is folded over the beveled surface of the top plate tip;

(c) a filter cartridge positioned between the top plate and the closed end of the outer shell;
(i) the filter cartridge including media extending between first and second end caps and defining an open interior;
(A) the second end cap being closed and being positioned adjacent the shell closed end;
(B) the first end cap having a central aperture therethrough in direct flow communication with the open interior defined by the media;
(1) the first end cap including an axially projecting seal support with a seal member positioned thereon; and
(2) the first end cap including a plurality of spacers thereon; the spacers including axial spacers between the top plate and a portion of the first end cap at a location positioned radially outwardly from the seal support.

3. A liquid filter member according to claim 2 wherein the plurality of spacers include:
(a) a plurality of radial spacers between a remainder of the first end cap and the outer shell sidewall.

4. A liquid filter member according to claim 2 wherein:
(a) the sidewall of the shell includes an inwardly directed shoulder spaced from the lip; and
(b) the top plate is positioned with a first region between the lip and the shoulder;
(i) the top plate including a second region projecting from the first region toward the shell closed end.

Assignees

• Donaldson Co Inc

Inventors

• Mandt Brian
• Gulsvig Brent
• Hacker John

Classifications

• B01D35/30 Primary

  Filter housing constructions · CPC title

• B01D27/08 Primary

  Construction of the casing · CPC title

• B01D29/15

  arranged for inward flow filtration · CPC title

• B01D35/147

  Bypass or safety valves · CPC title

• B01D35/34

  open-topped (B01D35/31 takes precedence) · CPC title