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US 7,988,757 B2Granted
Air cleaner; replaceable filter cartridges; and, methods
AssigneeDonaldson Company, Inc.
InventorsJames R. Scott, Carolyn J. Finnerty, Steven Scott Gieseke, Douglas Lee Iddings, William M. Juliar, Gregory LaVallee
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. An optional mechanical interlock, operated with a non-threaded, movement of the cartridge, is provided between the primary filter cartridge and the housing. 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.
Claims18
An air filter cartridge comprising:
- (a) first and second, opposite, ends;
- (i) the first end having an air flow exit aperture therethrough;
- (b) pleated filter media:
- extending between the first and second ends;
- and, surrounding and defining an open filter interior;
- (c) outer framework having a sidewall structure circumscribing the media at least at a location adjacent the first end and having an outer surface;
- (d) a first member of a non-continuously threaded rotational engagement mechanism:
- positioned adjacent to, and spaced from, the first end and positioned on an outer surface of the outer framework;
- (i) the first member being integral with a remainder of the outer framework;
- (e) an axial seal ring on the first end at a location circumscribing the air flow exit aperture;
- and,
- (f) the second end having an outer, axial, central surface with a non-circularly shaped central recess therein.
9 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;
- (ii) the second end cap being closed;
- and,
- (iii) the first end cap having a first outer diameter and the second end cap having a second outer diameter;
- the first end cap having a larger outer diameter than the second end cap;
- (b) pleated filter media:
- extending between the first and second ends;
- and, surrounding and defining an open filter interior;
- (c) a seal member on the first end cap oriented to form an outwardly directed radial seal with a portion of an air cleaner assembly;
- the outwardly directed radial seal defining a seal diameter smaller than the outer diameter of the first end cap;
- (d) the second end cap having an outer, axial, central, surface with a central recess therein;
- and,
- (e) an outer framework having a sidewall structure circumscribing the media and extending between the first and second end caps.
11 more elements
An air filter cartridge comprising:
- (a) first and second, opposite, end caps;
- (i) the first end cap being a molded-in-place end cap having an air flow exit aperture therethrough;
- (ii) the first end cap having a housing seal comprising an integrally molded portion of the first, molded-in-place, end cap;
- and,
- (iii) the second end cap including a central recess therein;
- (b) pleated filter media embedded in, and extending between, the first and second end caps;
- (i) the filter media surrounding and defining an open filter interior;
- and,
- (ii) the filter media defining a conical shape in extension between the first and second end caps, with a larger diameter adjacent the first end cap;
- and,
- (c) an outer framework having a sidewall structure circumscribing the media at least at a location adjacent the first end cap;
- (i) the outer framework including a circular, radially outwardly projecting, ring positioned adjacent the first end of the filter cartridge and at a location between the first end cap and the second end cap.
9 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;
- (ii) the send end cap being closed;
- and,
- (iii) the first end cap having a first outer diameter and the second end cap having a second outer diameter;
- the first end cap having a larger outer diameter than the second end cap;
- (b) pleated filter media extending between the first and second end caps and surrounding and defining an open filter interior;
- (i) the filter media defining a conical shape in extension between the first and second end caps with a larger diameter adjacent the first end cap;
- (c) a seal member on the first end cap oriented to form an outwardly directed radial seal with a portion of an air cleaner assembly;
- the outwardly directed radial seal defining a seal diameter smaller than the first end cap;
- and,
- (d) the second end cap having a central, non-circularly shaped, central recess therein.
9 more elements
Dependencies are inferred from the claim text.