Reverse flow air filter arrangement and method

  • US 5,690,712 A
  • Filed: 10/31/1996
  • Issued: 11/25/1997
  • Est. Priority Date: 11/23/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. An air filter element comprising:

  • (a) a first end cap having an air inlet opening therein;

    (b) a second end cap;

    (c) a cylindrical extension of filter media defining an open filter interior and having an inside diameter, the filter media being potted within the first and second end caps;

    (d) an inner support liner;

    (e) an outer support liner;

    (f) the second end cap having;

    (i) a central drainage aperture, said central drainage aperture being substantially smaller than the inside diameter of the filter media; and

    ,(g) an interior surface positioned within said open filter interior and constructed and arranged to funnel moisture to said central drainage aperture;

    said interior surface extending between said inner support liner and said central drainage aperture, on an opposite side of said inner support liner from said filter media.

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