Air cleaner; replaceable filter cartridges; and, methods
The disclosure concerns air cleaners. Preferred air cleaners are shown which include a housing and a removable and replacement primary filter cartridge. Optional and advantageous features are shown. The preferred primary filter cartridge is conical in shape. A preferred optional safety or secondary filter cartridge is shown. Preferred methods of assembly and use are provided.
1. An air filter cartridge comprising:
(a) media extending between first and second cartridge ends and around an open filter interior;
(i) the cartridge first end being an open end with an air flow aperture therethrough; and,
(ii) the cartridge second end being closed to air flow passage therethrough;
(b) a support having a portion surrounded by the media;
(c) a housing seal member positioned on the air filter cartridge adjacent the cartridge first end; and,
(d) two posts positioned on the cartridge second end;
(i) each post projecting in a direction away from the cartridge first end.
2. An air filter cartridge according to claim 1 wherein:
(a) the first and second posts are circular in cross-section.
3. An air filter cartridge according to claim 1 wherein:
(a) a portion of the support surrounded by the media having a porous structure at least 50% open.
4. An air filter cartridge according to claim 3 wherein:
(a) the portion of the support surrounded by the media is a porous structure comprising extensions supported by parallel spaced hoops.
5. An air filter cartridge according to claim 1 wherein:
(a) the media is not pleated.
6. An air filter cartridge according to claim 1 wherein:
(a) the housing seal member is configured to form a radially directed seal.
7. An air filter cartridge according to claim 6 wherein:
(a) the housing seal member is an o-ring.
8. An air filter cartridge according to claim 1 wherein:
(a) the media defines a circular outer perimeter in a cross-section perpendicular to a direction between the first and second cartridge ends.
9. An air filter cartridge according to claim 1 wherein:
(a) each of the two posts is positioned in axial overlap with the open filter interior.
10. An air filter cartridge according to claim 1 including:
(a) the support includes members positioned on the cartridge; the members defining slots oriented to receive projections on a housing therein, during cartridge installation.
11. An air cleaner assembly comprising:
(a) a housing defining a housing interior and having a sidewall with first and second opposite ends;
(i) the first end having an axial outlet thereon; and,
(ii) the housing sidewall being closed by a removable end cover;
(b) an air filter cartridge operably and removably positioned with within the housing interior; the air filter cartridge comprising:
(i) media extending between first and second cartridge ends and around an open filter interior;
(A) the cartridge first end being an open end with an air flow aperture therethrough; and,
(B) the cartridge second end being closed to air flow passage therethrough;
(ii) a support having a portion surrounded by the media;
(iii) a housing seal member positioned on the air filter cartridge adjacent the cartridge first end; and,
(iv) two posts positioned on the cartridge second end;
(A) each post projecting in a direction away from the cartridge first end; and,
(v) the air cleaner including a precleaner arrangement having a dust drop tube.
12. An air cleaner assembly according to claim 11 wherein:
(a) the support includes slots positioned on the cartridge; the slots being oriented to receive projections on a housing passing therein, during cartridge installation; and,
(b) the housing including projection portions that project into the slots, as the cartridge is installed.