Liquid filter assembly; components; and, methods

Patent metadata

Field	Value
Publication number	US-9468871-B2
Application number	US-201414157788-A
Country	US
Kind code	B2
Filing date	Jan 17, 2014
Priority date	Sep 6, 2006
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A liquid filter assembly is provided. The preferred assembly includes a serviceable filter cartridge having a primary filter section and a secondary or bypass filter section. The preferred assembly includes a bypass valve arrangement and a suction filter arrangement. An optional valve, to allow flow from an interior of the assembly to a reservoir if needed, is provided. Preferred serviceable filter cartridges are shown.

First claim

What is claimed is:

1. A liquid filter cartridge comprising:
(a) a primary filter cartridge section comprising media surrounding a central volume and defining a central axis;
(i) the media defining first and second ends;

(b) a first end cap positioned at the first end of the media;
(i) the first end cap including a seal support thereon;
(ii) the seal support including a first inner seal member positioned thereon to define a first, inwardly directed, radial seal; the first, inwardly directed, radial seal being positioned to define a seal non-orthogonal to the central axis of the primary filter cartridge section; and,

(c) a second end cap at the second end of the media;
(i) the second end cap having a central aperture therethrough.

2. A liquid filter cartridge to claim 1 including:
(a) a bypass filter section having bypass filter media surrounding a central volume;
(i) the seal support on the second end cap being surrounded by the bypass filter media.

3. A liquid filter cartridge according to claim 1 wherein:
(a) the first end cap includes a second seal member thereon.

4. A liquid filter cartridge according to claim 3 wherein:
(a) the second seal member is radially outwardly directed seal member positioned around a seal support on the first end cap.

5. A liquid filter cartridge according to claim 1 wherein:
(a) the first inner seal member defines a seal plane non-orthogonal to the central axis.

6. A liquid filter cartridge according to claim 5 including:
(a) a bypass filter section having bypass filter media surrounding a central volume;
(i) the seal support on the second end cap being surrounded by the bypass filter media.

7. A liquid filter cartridge according to claim 1 wherein:
(a) the seal support includes a sidewall section with a first key slot thereon;
(i) the first key slot being spaced from the first seal member in a direction opposite the primary filter cartridge section and extending in a direction away from the primary filter cartridge section.

8. A liquid filter cartridge according to claim 1 wherein:
(a) the seal support includes a sidewall section defining a first opening therethrough; the first opening being positioned spaced from the first seal member and being positioned between a portion of the first seal member and the primary filter cartridge section.

9. A liquid filter cartridge according to claim 8 wherein:
(a) the first opening in the seal support sidewall section is in communication with a first axial surface of the seal support;
(i) the first axial surface of the seal support being a surface directed away from the first seal member and toward the primary filter cartridge section.

10. A liquid filter cartridge according to claim 1 wherein:
(a) the seal support includes an inner shoulder directed toward the primary filter cartridge;
(b) the first end cap includes an axial projection directed toward the inner shoulder of the seal support; and,
(c) the first inner seal member is positioned on the inner shoulder of the seal support between the inner shoulder and the axial projection of the first end cap.

11. A liquid filter cartridge comprising:
(a) a primary filter cartridge section comprising media surrounding a central volume and defining a central axis;
(i) the media defining first and second ends;

(b) a first end cap positioned at the first end of the media;
(i) the first end cap including a seal support thereon;
(ii) the seal support including a first inner seal member positioned thereon to define a first, inwardly directed, radial seal; and,
(iii) the seal support including; a key slot thereon; the key slot being spaced from the first seal member in a direction opposite the primary filter cartridge section and extending in a direction away from the primary filter cartridge section; the slot opening in a direction opposite the primary filter cartridge section and having a central axis about parallel to the primary filter cartridge central axis; and

(c) a second end cap at the second end of the media;
(i) the second end cap having a central aperture therethrough.

12. A liquid filter assembly comprising:
(a) a housing including a filter head section and a depending sidewall section;
(i) the filter head section including a removable top; and, a liquid flow inlet;
(ii) the sidewall section depending downwardly from the filter head section to a housing bottom having a central flow aperture therethrough;

(b) a central tubular support positioned on the housing bottom and including a tubular section projecting toward the filter head section; and,
(c) a liquid filter cartridge comprising:
(i) a primary filter cartridge section comprising media surrounding a central volume and defining a central axis;
(A) the media defining first and second ends;

(ii) a first end cap positioned at the first end of the media;
(A) the first end cap including a seal support thereon;
(B) the seal support including a first inner seal member positioned thereon to define a first, inwardly directed, radial seal; and,
(C) the seal support including; a key slot thereon; the key slot being spaced from the first seal member in a direction opposite the primary filter cartridge section and extending in a direction away from the primary filter cartridge section; the slot opening in a direction opposite the primary filter cartridge section and having a central axis about parallel to the primary filter cartridge central axis; and

(iii) a second end cap at the second end of the media;
(A) the second end cap having a central aperture therethrough;

(iv) the liquid filter cartridge being positioned with the radial seal releasably sealed around the central tubular support.

13. A liquid filter assembly according to claim 12 wherein:
(a) the first inner seal member defines a seal plane non-orthogonal to the central axis.

14. A liquid filter assembly comprising:
(a) a housing including a filter head section and a depending sidewall section;
(i) the filter head section including a removable top; and, a liquid flow inlet;
(ii) the sidewall section depending downwardly from the filter head section to a housing bottom having a central flow aperture therethrough;

(b) a central tubular support positioned on the housing bottom and including a tubular section projecting toward the filter head section; and,
(c) a liquid filter cartridge comprising:
(i) a primary filter cartridge section comprising media surrounding a central volume and defining a central axis;
(A) the media defining first and second ends;

(ii) a first end cap positioned at the first end of the media;
(A) the first end cap including a seal support thereon;
(B) the seal support including a first inner seal member positioned thereon to define a first, inwardly directed, radial seal; the first, inwardly directed, radial seal being positioned to define a seal non-orthogonal to the central axis of the primary filter cartridge section; and,

(iii) a second end cap at the second end of the media;
(A) the second end cap having a central aperture therethrough;

(iv) the liquid filter cartridge being positioned with the radial seal releasably sealed around the central tubular support.

15. A liquid filter assembly according to claim 14 wherein:
(a) the first inner seal member defines a seal plane non-orthogonal to the central axis.

Assignees

• Donaldson Co Inc

Inventors

• Formica Claudio

Classifications

• B01D2201/0415

  Details of supporting structures · CPC title

• B01D2201/4046

  Means for avoiding false mounting of different parts · CPC title

• B01D29/15 Primary

  arranged for inward flow filtration · CPC title

• B01D29/54

  arranged concentrically or coaxially · CPC title

• B01D35/0276

  Filtering elements with a vertical rotation or symmetry axis mounted on tanks or reservoirs · CPC title