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US 2013/0199138 A1Published application
Air cleaner; replaceable filter cartridges; and, methods
AssigneeDonaldson Company, Inc.
InventorsJames Scott, Steven Gieseke, Douglas Iddings
Life of this patent
Estimating the term…
Abstract
The disclosure concern 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.
Claims20
An air filter cartridge comprising:
- (a) first and second, opposite, ends;
- (i) the first end having an air flow exit aperture therethrough;
- (b) a conical extension of filter media, extending between the first and second ends, surrounding an open interior and defining a central cartridge axis;
- (c) a first, open, end cap adjacent the first end of the filter cartridge;
- (d) a housing seal positioned on the first end cap and including a seal surface directed radially, with respect to the cartridge central axis, to form a removable seal with a portion of an air cleaner, in use;
- and,
- (e) a second, closed, end cap adjacent the second end of the filter cartridge;
- (i) the second end cap having a central portion including:
- an inner surface portion in overlap with the central interior and directed toward the first end cap;
- and, an outer surface opposite the inner surface portion;
- (ii) the second end cap central portion axially projecting inwardly of the filter cartridge to a location surrounded by media and defining an outer surface recess in the outer surface thereof;
- (iii) the central portion including a central projection on the outer surface surrounding and defining an inner recess in the inner surface that is open toward the first end cap;
- and,
- (iv) the outer surface recess surrounding the central projection on the outer surface.
11 more elements
An air cleaner comprising:
- (a) a housing having an interior and comprising a body section with an open end closed by a removable access cover;
- and,
- (b) a main filter cartridge operably positioned within the housing interior;
- the main filter cartridge comprising:
- (i) first and second, opposite, ends;
- (A) the first end having an air flow exit aperture therethrough;
- (ii) a conical extension of filter media, extending between the first and second ends, surrounding an open interior and defining a central cartridge axis;
- (iii) a first, open, end cap adjacent the first end of the main filter cartridge;
- (iv) a housing seal positioned on the first end cap and including a seal surface directed radially with respect to the cartridge central axis and forming a removable seal with a portion of an air cleaner;
- and,
- (v) a second, closed, end cap adjacent the second end of the filter cartridge;
- (A) the second end cap having a central portion including:
- an inner surface portion in overlap with the central interior and directed toward the first end cap;
- and, an outer surface opposite the inner surface portion;
- (B) the second end cap central portion axially projecting inwardly of the filter cartridge to a location surrounded by media and defining an outer surface recess in the outer surface thereof;
- (C) the central portion including a central projection on the outer surface surrounding and defining an inner recess in the inner surface portion that is open toward the first end cap;
- and,
- (D) the outer surface recess surrounding the central projection on the outer surface.
15 more elements
Dependencies are inferred from the claim text.