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US 6,585,793 B2Granted
Filter apparatus and methods
AssigneeAndreae Filters, Inc.
InventorsC. Shaun Richerson, Robert Andreae
Life of this patent
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Abstract
The invention provides a filter apparatus for removing air entrained particles comprising a pleated filter media. A first media member has a plurality of alternating upstream and downstream folds and a wall connecting the folds. A pair of slits forms an aperture and a hinged pleat. A second media member matingly attaches to the first media member.
Claims60
A filter apparatus for removing air entrained particulates comprising:
- a first media member comprising:
- a pair of upstream folds;
- a downstream fold interposed between the pair of upstream folds;
- a wall connecting each of the pair of upstream folds to the downstream fold;
- an aperture positioned on the wall between the pair of upstream folds;
- and
- a pleat hinged to an edge of the aperture, wherein the pleat and a border around the aperture form a diamond shape.
4 more elements
A filter apparatus comprising:
- a first media member comprising:
- a plurality of alternating upstream folds and downstream folds;
- a wall connecting the upstream folds to the downstream folds;
- and
- a pair of slits through the wall and across the downstream fold such that the first media member is voidless in a flat state and such that the pair of slits forms an aperture with a pleat at least partially covering the aperture in a corrugated state.
2 more elements
A filter apparatus for removing air entrained particulates comprising:
- a first media member comprising:
- a pair of upstream folds;
- a downstream fold interposed between the pair of upstream folds;
- a wall connecting each of the pair of upstream folds to the downstream fold;
- an aperture formed by a pair of slits perpendicular to and across the downstream fold and positioned on the wall between the pair of upstream folds;
- and
- a pleat hinged to an edge of the aperture, wherein the downstream fold across the pleat is reversed such that the pleat projects in the same direction as the upstream folds.
4 more elements
A filter apparatus comprising:
- a plurality of alternating upstream folds and downstream folds;
- a wall connecting the upstream folds to the downstream folds;
- and
- a pleat formed by a pair of slits through the wall and across the downstream folds, the pleat projecting in the same direction as the upstream folds.
1 more element
Dependencies are inferred from the claim text.