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US 7,070,642 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
A filter cartridge comprising:
- (a) first and second, opposite, ends;
- (i) the first end having an air flow exit aperture therethrough;
- (b) filter media extending between the first and second ends;
- (c) outer framework having a sidewall structure circumscribing the media at least at a location adjacent the first end and having an outer surface;
- the outer framework including an air impermeable portion in the sidewall structure of the outer framework;
- and,
- (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, integral with a remainder of the outer framework;
- and,
- (e) an axial seal ring on the first end and circumscribing the air flow exit aperture.
6 more elements
A filter cartridge comprising:
- (a) first and second, opposite, ends;
- (i) the first end having an air flow exit aperture therethrough;
- (b) filter media extending between the first and second ends;
- (c) outer framework having a sidewall structure circumscribing the media at least at a location adjacent the first end and having an outer surface;
- the outer framework including an air impermeable portion in the sidewall structure of the outer framework;
- and,
- (d) a first member of a non-continuously threaded, rotational engagement mechanism positioned adjacent to, and spaced from, the first end, the first member comprising a segmented ring;
- and,
- (e) an axial seal ring on the first end and circumscribing the air flow exit aperture.
6 more elements
A filter cartridge comprising:
- (a) first and second, opposite, ends;
- (i) the first end having an air flow exit aperture therethrough;
- (b) filter media extending between the first and second ends;
- (c) outer framework having a sidewall structure circumscribing the media at least at a location adjacent the first end and having an outer surface;
- the outer framework including an air impermeable portion in the sidewall structure of the outer framework, said outer framework extending from said first end to said second end and including:
- (i) an imperforate shield section adjacent said first end and extending over an axial distance of at least 10% of the axial length of the outer framework;
- and,
- (ii) a perforate section having an open area of at least 50% extending between the shield section and the second end;
- the perforate section having an axial length of at least 20% of the axial length of the outer framework;
- and,
- (d) a first member of a non-continuously threaded, rotational engagement mechanism positioned adjacent to, and spaced from, the first end;
- and,
- (e) an axial seal ring on the first end and circumscribing the air flow exit aperture.
10 more elements
A filter cartridge comprising:
- (a) first and second, opposite, ends;
- (i) the first end having an air flow exit aperture therethrough;
- (b) filter media extending between the first and second ends;
- (c) outer framework having a sidewall structure circumscribing the media at least at a location adjacent the first end and having an outer surface;
- the outer framework including an air impermeable portion in the sidewall structure of the outer framework;
- and,
- (d) a first member of a non-continuously threaded, rotational engagement mechanism positioned adjacent to, and spaced from, the first end;
- and,
- (e) an axial seal ring on the first end and circumscribing the air flow exit aperture;
- wherein:
- the outer framework comprises a molded plastic member extending between the first and second ends;
- and includes:
- (i) a first, open, end embedded within a first end cap potting and defining an air flow outlet aperture;
- and
- (ii) a second end embedded within a second end cap potting and including:
- (A) a central, imperforate end region;
- and,
- (B) an outer, annular, perforate, region surrounding the central, imperforate, region;
- (1) the annular perforate, region being embedded in, and closed by, the second end cap potting;
- and
- (2) at least a central portion of the central, imperforate, region not being embedded in the second end cap potting.
18 more elements
A filter cartridge comprising:
- (a) first and second, opposite, ends;
- (i) the first end having an air flow exit aperture therethrough;
- (b) filter media extending between the first and second ends;
- (c) outer framework having a sidewall structure circumscribing the media at least at a location adjacent the first end and having an outer surface;
- the outer framework including an air impermeable portion in the sidewall structure of the outer framework, and having a conical shaped portion with a portion adjacent the first end having an outer diameter D1 and a portion adjacent the second end having an outer diameter D2, wherein D1<D2;
- and,
- (d) a first member of a non-continuously threaded, rotational engagement mechanism positioned adjacent to, and spaced from, the first end;
- and,
- (a) an axial seal ring on the first end and circumscribing the air flow exit aperture.
6 more elements
An air cleaner assembly comprising:
- (a) a housing having a sidewall and first and second opposite ends;
- (i) the first end being closed and having an axial outlet tube therein;
- (ii) the housing including a dust drop rube adjacent the first end;
- (iii) the housing including a side air flow inlet adjacent the second end;
- (iv) the housing sidewall second end being an open end;
- and,
- (v)the housing having an end cover removably mounted to close the housing second end;
- the end cover being a completely closed end cover and having a precleaner comprising a shield having a spiral ramp on an outer surface thereof;
- the precleaner being positioned to operably receive air from the said air flow inlet, in use.
6 more elements
Dependencies are inferred from the claim text.