Filter cartridge arrangements and assemblies; preferred features; methods of assembly and use
The present disclosure relates to filter assemblies. The features described and characterized are typically applied in gas (for example, air) cleaner assemblies. A typical use is in air cleaner assemblies for vehicles or other equipment. The techniques described relate, at least in part, to provision of assemblies with preferred configurations for convenient servicing and operation, while ensuring a proper cartridge is appropriately positioned, oriented and secured for use. Many of the techniques relate to arrangements in which features at opposite ends of a housing and/or cartridge are eccentrically positioned as described.
1. A filter cartridge comprising:
(a) pleated filter media surrounding an open filter interior;
(i) the filter media having first and second ends;
(b) a first end piece positioned at the first end of the filter media;
(i) the first end piece having a flow aperture therethrough; and,
(ii) the first end piece including a radially directed housing seal member thereon;
(c) a second end piece positioned at the second end of the filter media;
(d) the filter media first end defining a first media outer perimeter at a location adjacent the first end piece; and,
(e) the filter media second end defining a second media outer perimeter at a location adjacent the second end piece;
(i) the first and second media outer perimeters being eccentrically aligned with respect to one another; and
(ii) the first media outer perimeter, defined by outer pleat tips, has a first dimension of length and the second media outer perimeter has a second dimension of length, the first dimension of length being within 90-110% of the second dimension of length.
2. A filter cartridge according to claim 1 wherein:
(a) the second end piece is closed, and has no aperture therethrough, in direct flow communication with the open filter interior; and,
(b) the second end piece includes a receiver projection extending into the open filter interior a distance, from the filter media second end toward the filter media first end, corresponding to at least 10% of a distance from the filter media second end to the filter media first end;
(i) the receiver projection defining a receiver recess at an opposite side thereof, from the open filter interior.
3. A filter cartridge according to claim 2 wherein:
(a) the receiver projection of the second end piece has a portion with a non-circular cross-sectional shape in a plane perpendicular to a direction of extension of the media.
4. A filter cartridge according to claim 2 wherein:
(a) the receiver projection has a shape with:
(i) a cap portion remote from the second end of the media having a circular cross-sectional shape; and,
(ii) a base portion extending between the cap portion and a location adjacent the second end of the media; the base portion having a central section with a non-circular cross-sectional shape.
5. A filter cartridge according to claim 2 wherein:
(a) the second end piece includes a second housing engagement member comprising a second resistive housing engagement member.
6. A filter cartridge according to claim 5 wherein:
(a) the second resistive housing engagement member is a radially inwardly directed housing engagement member.
7. A filter cartridge according to claim 5 wherein:
(a) the second, resistive, housing engagement member comprises an axially inwardly directed engagement member surrounding an opening into a receiver projection in the second end piece.
8. A filter cartridge according to claim 1 wherein:
(a) the second end piece includes a recess therein having a radially inwardly projecting, radial alignment locator projection arrangement thereon.
9. A filter cartridge according to claim 1 wherein:
(a) the second end piece includes an outer surface portion having a central axial projection thereon projecting in a direction away from the open filter interior and the first end piece.
10. A filter cartridge according to claim 9 wherein:
(a) the central axial projection has a shape, in extension around a receiver space, having an outer surface comprising a plurality of radially outwardly projecting lobes separated by recesses.
11. A filter cartridge according to claim 1 wherein:
(a) the radially directed housing seal member includes a radially outwardly directed housing seal member.
12. A filter cartridge according to claim 1 wherein:
(a) the radially directed housing seal member comprises an integral portion of a molded-in-place portion of the first end piece.
13. A filter cartridge according to claim 12 wherein:
(a) the radially directed housing seal member defines a seal surface having non-circular configuration comprising at least three lobes alternating with at least three recesses to define a plurality of spaced radially directed lobes in the seal surface, in direction around, and relative to, a central axis surrounded by the seal surface.
14. A filter cartridge according to claim 1 wherein:
(a) the second end piece has an outer perimeter;
(i) the radially directed housing seal member and the second end piece outer perimeter being eccentrically aligned with respect to one another.
15. A filter cartridge according to claim 1 wherein:
(a) the first end piece includes a first housing seal member thereon having a seal pattern surrounding a first housing seal member center c 1 ; and,
(b) the second end piece includes a second housing engagement member having an engagement pattern surrounding a second housing engagement member center c 2 ;
(c) the centers c 1 and c 2 being eccentrically aligned.
16. A filter cartridge according to claim 15 wherein:
(a) the centers c 1 and c 2 are offset by an eccentricity distance Z of at least 5 mm.
17. A filter cartridge according to claim 1 wherein:
(a) the first end piece having a radially outwardly directed first housing radial seal thereon; and,
(b) the second end piece has a radially inwardly directed, resistive, second housing engagement member thereon; and,
(i)the radially directed housing seal member and the resistive second housing engagement member being eccentrically aligned relative to one another.
18. A filter cartridge according to claim 1 including:
(a) a liner support having a first inner liner support section with a first inner liner end and a second inner liner end;
(i) the first and second inner liner ends being eccentrically aligned with respect to one another;
(b) the filter media surrounds the inner liner support section;
(i) the first end of the filter media being adjacent the first inner liner end and the second end of the filter media being adjacent the second inner liner end.
19. A filter cartridge according to claim 18 wherein:
(a) the liner support includes a first end member in axial overlap with the first media end including a seal support member secured to the inner liner section by spaced extensions; the seal support member is non-circular and eccentrically aligned relative to the second end of the liner support.
20. An air cleaner assembly comprising:
(a) a housing having: at least one access cover; an air flow inlet; and, an air flow outlet; and,
(b) a filter cartridge according to claim 1 operably positioned within the housing and releasably sealed thereto.