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Air filter arrangement having first and second filter media dividing a housing and methods

  • US 6,210,469 B1
  • Filed: 02/26/1999
  • Issued: 04/03/2001
  • Est. Priority Date: 02/26/1999
  • Status: Expired due to Term
First Claim
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1. A filter arrangement comprising:

  • (a) a housing including a dirty airflow inlet and a clean airflow outlet;

    (i) said inlet defining a first cross-sectional area;

    (b) a first air expansion chamber in said housing downstream of said inlet;

    said first chamber defining a second cross-sectional area larger than said first cross-sectional area;

    (i) said first chamber defining a particle collection container;

    (c) a second chamber in said housing downstream of said first chamber;

    said second chamber having a third cross-sectional area smaller than said second cross-sectional area;

    (d) a first region of filtering media between said first and second chambers;

    (i) said first region of filtering media constructed and arranged to remove at least a portion of particles from the dirty airflow and deposit the particles in said particle collection container;

    (e) a third chamber in said housing downstream from said second chamber;

    (i) said third chamber defining a clean air plenum;

    (f) a second region of filtering media downstream of said second chamber;

    (i) said second region of filtering media being oriented within said third chamber;

    (ii) said second region of filtering media constructed and arranged to remove at least a portion of particles from the dirty air flow;

    (iii) said second region of filtering media comprising a removable and replaceable element of fluted media;

    (A) said fluted media comprising a plurality of flutes;

    each of said flutes having an upstream portion and a downstream portion;

    (i) selected ones of said flutes having the upstream portion open and downstream portion closed, and selected ones of said flutes having the upstream portion closed and downstream portion open;

    (iv) said second region of filtering media including a handle member projecting therefrom;

    said handle member secured to an inner core of said second region of filtering media;

    (A) said handle member including a projection sized to be grasped by a human hand; and

    (v) said second region of filtering media including a seal member secured to an outer periphery thereof;

    said seal member forming a seal between said second and third chambers.

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