Filter elements for circulating air systems

CAFC
  • US 8,062,403 B2
  • Filed: 10/13/2008
  • Issued: 11/22/2011
  • Est. Priority Date: 10/12/2007
  • Status: Active Grant
First Claim
Patent Images

1. A reusable air filter assembly for circulating air systems, comprising:

  • a. a frame, comprising two frame units capable of sandwiching a number of layers of material, and each comprising a feature that overlaps the other, wherein a single screw can be disposed through the overlap to secure the frames relative to each other;

    b. a series of material disposed in the frame, containing a first layer of expanded metal lath, a second layer of small fiber material, a third layer of large fiber material, a fourth layer of small crimp wire cloth, a fifth layer of small fiber material, and a sixth layer of expanded metal lath, arranged in this order, wherein the direction of air flow is from the first layer to the sixth layer;

    c. screws anchoring the frame units in position; and

    d. support brackets for holding the frame units in position at corners of the frame units, wherein the screws extend through the support brackets and overlapping portions of the frame units.

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