Filter cartridge; features and methods of assembly; filter assemblies; and, filter cartridge combinations

Patent metadata

Field	Value
Publication number	US-9925485-B2
Application number	US-201314646532-A
Country	US
Kind code	B2
Filing date	Nov 29, 2013
Priority date	Nov 29, 2012
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

Filter cartridge arrangements, features thereof and assembly for use therewith, are provided. Selected filter cartridge features disclosed are particularly well adapted for use with a safety or secondary filter cartridge, usable with media thereof projecting into an open interior of a main filter cartridge, in use. An example filter cartridge is described, with a non-pleated end and a pleated end, although variations are also described. Advantageous main cartridges are also described. Methods of assembly and systems for use are described.

First claim

What is claimed is:

1. A filter cartridge comprising:
(a) media extending between first and second media ends and surrounding and defining a central axis and an open central interior;
(b) an end piece adjacent to, and extending across, the media second end;
(i) the end piece including: an outer surface directed away from the first media end; and, an inner surface directed toward the first media; and,
(ii) the outer surface of the end piece having a central projection thereon extending in a direction away from the first media end; the central projection defining a central recess therein, on the inner surface of the end piece;
(iii) the central projection having a tip with an aperture therethrough; and
(iv) the end piece having a circular outer perimeter; and

(c) a cushion member positioned with a portion thereof in the central recess and a portion projecting through the aperture in the central projection.

2. A filter cartridge according to claim 1 including:
(a) a radially directed housing seal arrangement.

3. A filter cartridge according to claim 2 wherein:
(a) the radially directed housing seal arrangement is a radially outwardly directed housing seal arrangement.

4. A filter cartridge according to claim 3 wherein:
(a) the cushion member is closed.

5. A filter cartridge according to claim 4 including:
(a) a media support extending from the second end toward the first end of the media.

6. A filter cartridge according to claim 5 wherein:
(a) the end piece of the media support includes an outer surface with a central receiving groove therein surrounding an outer, central, projection.

7. A filter cartridge according to claim 6 wherein:
(a) the central receiving groove is at least 5 mm deep, in axial direction toward the first end of the media, from any immediately surrounding portion of the closed end of the media support.

8. A filter cartridge according to claim 7 wherein:
(a) the outer central projection projects to a tip located axially beyond the second end of the media, from the first end of the media.

9. A filter cartridge according to claim 8 wherein:
(a) the outer central projection projects to a tip at least 5 mm from an immediately surrounding portion of the closed end, in a direction axially away from the open end.

10. A filter cartridge according to claim 1 including:
(a) an end piece adjacent to the second media end; the end piece including: an outer surface directed away from the first media end; and, an inner surface directed toward the first media end; and,
(b) a resilient cushion member arrangement positioned in the central recess and projecting through, and closing, the aperture in the tip of the central projection.

11. An air filter assembly comprising:
(a) a housing defining: an interior, an air flow inlet; and, an air flow outlet;
(i) the housing including a housing base section and a removable access cover;
(ii) the housing including a central cartridge support in the housing base section directed toward the access cover and having an end with a projection thereon; and
(iii) the access cover including a projection extending toward the central cartridge support;

(b) a safety filter cartridge operably and removably positioned within the housing interior;
(i) the safety filter cartridge having an end directed toward the access cover with a closed resilient grommet thereon surrounding the end projection with the central cartridge support;
(ii) the safety filter cartridge being positioned with the central cartridge support projecting into an open filter interior of the safety filter cartridge and engaged by the closed resilient grommet; and,
(iii) the safety filter cartridge including an end directed toward the access cover having an outer surface with a receiver groove surrounding a central projection; and,

(c) a main filter cartridge comprising media surrounding an open filter interior;
(i) the main filter cartridge being operably and removably positioned within the housing interior with media of the safety cartridge projecting into the open filter interior of the main filter cartridge;
(ii) the main filter cartridge including a closed end piece having an inner surface with a projection extending into the receiver groove on the outer surface of the safety cartridge end;

(d) the access cover being positioned with the central projection extending into the receiver groove of the safety filter cartridge.

12. An air filter assembly according to claim 11 wherein:
(a) the safety filter cartridge includes an end directed toward the access cover with a projection having a tip with an aperture therethrough;
(i) the central projection on the central cartridge support projecting completely through the aperture in the tip of the projection in the safety filter cartridge; and,
(ii) the aperture in the tip of the projection in the safety filter cartridge being closed by the resilient cushion member.

13. An air filter assembly according to claim 12 wherein:
(a) the central projection on the central cartridge support includes a tip and a neck section;
(i) the neck section having a narrower cross-sectional dimension than a dimension of the central projection, on the central cartridge support, adjacent the tip.

14. An air filter assembly according to claim 13 wherein:
(a) an interference fit is provided between the tip of the central projection on the central cartridge support, and the safety filter cartridge, by the tip and the neck section.

Assignees

• Donaldson Co Inc

Inventors

• Campbell Steven
• Baseotto Michel

Classifications

• B01D2271/027

  Radial sealings · CPC title

• F02M35/0245

  Pleated, folded, corrugated filter elements, e.g. made of paper · CPC title

• B01D46/0098

  Protecting coverages on the filter which is removed before the filter is used, protection of filter, packaging · CPC title

• F02M35/02416

  Fixing, mounting, supporting or arranging filter elements; Filter element cartridges · CPC title

• F02M35/0216

  arranged in series, e.g. pre- and main filter in series · CPC title