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US 11,478,741 B2Granted
Air cleaner; replaceable filter cartridges; and, methods
AssigneeDonaldson Company, Inc.
InventorsJames R. Scott, Carolyn Finnerty, Steven Gieseke, Douglas Iddings, William Juliar, Gregory LaVallee
Life of this patent
Estimating the term…
Abstract
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.
Claims29
An air filter cartridge comprising:
- (a) first and second, opposite, end caps;
- (i) the first end cap having an air flow exit aperture therethrough;
- and
- (ii) the second end cap being closed;
- (b) pleated filter media extending between the first end cap and the second end cap, and surrounding and defining an open filter interior;
- (c) a first member of a non-continuously threaded rotational engagement mechanism positioned on an outer surface of the first end cap;
- (i) the first member of the non-continuously threaded rotational engagement mechanism comprising a plurality of radially extending projections located circumferentially around the outer surface of the first end cap;
- (ii) the plurality of radially extending projections being spaced from each other;
- (iii) the plurality of radially extending projections each comprising a tip and a stop, and including a cam surface located between the tip and the stop;
- and
- (iv) wherein the plurality of radially extending projections are constructed to engage housing projections on an inner surface of an air cleaner housing so that, as the air filter cartridge is rotated about an axis extending from the first end cap to the second end cap and through the open filter interior, the housing projections move along the plurality of radially extending projections along the cam surface;
- and
- (d) the second end cap having an outer, axial, central surface with a non-circularly shaped central recess therein.
10 more elements
An air filter cartridge comprising:
- (a) first and second, opposite, end caps;
- (i) the first end cap having an air flow exit aperture therethrough;
- and
- (ii) the second end cap being closed;
- (b) filter media extending between the first end cap and the second end cap, and surrounding and defining an open filter interior;
- (c) a first member of a non-continuously threaded rotational engagement mechanism positioned on an outer surface of the first end cap;
- (i) the first member of the non-continuously threaded rotational engagement mechanism comprising a plurality of radially extending projections located circumferentially around the outer surface of the first end cap;
- (ii) the plurality of radially extending projections being spaced from each other;
- (iii) the plurality of radially extending projections comprising a tip and a stop, and including a cam surface located between the tip and the stop;
- and
- (iv) wherein the plurality of radially extending projections are constructed to engage housing projections on an inner surface of an air cleaner housing so that, as the air filter cartridge is rotated about an axis extending from the first end cap to the second end cap and through the open filter interior, the projections move along the cam surface;
- (e) a seal member on the first end cap at a location circumscribing the air flow exit aperture;
- and
- (f) the second end cap having an outer, axial, central recessed surface, and a non-circularly shaped central recess in the outer, axial central recessed surface.
11 more elements
An air filter cartridge comprising:
- (a) first and second, opposite, end caps;
- (i) the first end cap having an air flow exit aperture therethrough;
- and
- (ii) the second end cap being closed;
- (b) pleated filter media extending between the first end cap and the second end cap, and surrounding and defining an open filter interior;
- (c) a first member of a non-continuously threaded rotational engagement mechanism positioned on an outer surface of the first end cap;
- (i) the first member of the non-continuously threaded rotational engagement mechanism comprising a plurality of radially extending projections located circumferentially around the outer surface of the first end cap;
- (ii) the plurality of radially extending projections being spaced from each other;
- (iii) the plurality of radially extending projections each comprising a tip and a stop, and including a cam surface located between the tip and the stop;
- and
- (iv) wherein the plurality of radially extending projections are constructed to engage housing projections on an inner surface of an air cleaner housing so that, as the air filter cartridge is rotated about an axis extending from the first end cap to the second end cap and through the open filter interior, the housing projections move along the plurality of radially extending projections along the cam surface;
- (d) the second end cap having an outer, axial, central surface with a non-circularly shaped central recess therein;
- and
- (e) the first end cap comprises a radially extending flange that forms a gap between the radially extending flange and the plurality of radially extending projections.
11 more elements
Dependencies are inferred from the claim text.