Patent US6790397B2 successfully refreshed from Google Patents.
US6790397B2
Expired / Lapsed
US
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Filter apparatus and methods
Assignee: Andreae Filters Inc
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Filing: 2003-06-30
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Granted: 2004-09-14
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Expires: 2023-06-30
Abstract
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.
Inventors
- 👤 C. Shaun Richerson
- 👤 Robert Andreae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:06
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/523; B01D45/00; B01D45/04; B01D45/08; B01D46/10; B01D50/00; B01D50/20; B01D2275/00; B01D2275/10; Y; Y10; Y10S; Y10S264/00; Y10S264/48; Y10S55/00; Y10S55/05
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
74 words
A method of forming a filter for removing air entrained particulates comprising: providing a voidless first media member comprising: a plurality of alternating upstream folds and downstream folds; and a wall connecting the upstream folds to the downstream folds; cutting a plurality of pairs of slits through the wall and across the downstream fold; partially collapsing the first media member to a corrugated state; and inverting the downstream fold between each pair of slits.
Claim 2
Independent Claim
74 words
A method of forming a filter for removing air entrained particulates comprising: providing a voidless first media member comprising: a plurality of alternating upstream folds and downstream folds; and a wall connecting the upstream folds to the downstream folds; cutting a plurality of pairs of slits through the wall and across the downstream fold; partially collapsing the first media member to a corrugated state; and inverting the downstream fold between each pair of slits.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the inverting step forms an aperture with a pleat for redirecting an airflow through the aperture.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein the pleat is hinged to the perimeter of the aperture.
Claim 5
Dependent Claim
52 words
The method of claim 3 further comprising: providing a second media member comprising: a plurality of alternating upstream creases and downstream creases; and a secondary wall connecting the upstream creases to the downstream creases; and forming a plurality of air exit means for allowing air to pass through the second media member.
Claim 6
Dependent Claim
26 words
The method of claim 4 wherein the forming step comprises cutting a plurality of pairs of secondary slits through the secondary wall across the upstream creases.
Claim 7
Dependent Claim
28 words
The method of claim 5 further comprising: partially collapsing the second media member to a corrugated state; and reversing the upstream crease between each pair of secondary slits.
Claim 8
Dependent Claim
25 words
The method of claim 6 wherein the reversing step forms a secondary aperture with a secondary pleat for redirecting the airflow through the secondary aperture.
Claim 9
Dependent Claim
30 words
The method of claim 7 further comprising matingly attaching the first media member to the second media member such that the upstream folds abut and attach to the upstream creases.
Claim 10
Dependent Claim
25 words
The method of claim 8 further comprising attaching a third media member formed of polyester mesh to the downstream crease of the second media member.
Claim 11
Independent Claim
54 words
A method of forming a filter: providing a voidless first media member comprising: a plurality of alternating upstream folds and downstream folds; and a wall connecting the upstream folds to the downstream folds; cutting a plurality of pairs of slits across the downstream fold; and inverting the downstream fold between each pair of slits.
Claim 12
Independent Claim
54 words
A method of forming a filter: providing a voidless first media member comprising: a plurality of alternating upstream folds and downstream folds; and a wall connecting the upstream folds to the downstream folds; cutting a plurality of pairs of slits across the downstream fold; and inverting the downstream fold between each pair of slits.
Claim 13
Dependent Claim
22 words
The method of claim 10 wherein the step of inverting further comprises partially collapsing the first media member to a corrugated state.
Claim 14
Dependent Claim
22 words
The method of claim 10 wherein the inverting step forms an aperture with a pleat for redirecting an airflow through the aperture.
Claim 15
Dependent Claim
16 words
The method of claim 12 wherein the pleat is hinged to the perimeter of the aperture.
Claim 16
Dependent Claim
52 words
The method of claim 13 further comprising: providing a second media member comprising: a plurality of alternating upstream creases and downstream creases; and a secondary wall connecting the upstream creases to the downstream creases; and forming a plurality of air exit means for allowing air to pass through the second media member.
Claim 17
Dependent Claim
26 words
The method of claim 14 wherein the forming step comprises cutting a plurality of pairs of secondary slits through the secondary wall across the upstream creases.
Claim 18
Dependent Claim
28 words
The method of claim 15 further comprising: partially collapsing the second media member to a corrugated state; and reversing the upstream crease between each pair of secondary slits.
Claim 19
Independent Claim
88 words
A method of forming a filter for removing air entrained particulates comprising: providing a voidless first media member comprising: a plurality of alternating upstream folds and downstream folds; and a wall connecting the upstream folds to the downstream folds; and cutting 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.
Claim 20
Independent Claim
88 words
A method of forming a filter for removing air entrained particulates comprising: providing a voidless first media member comprising: a plurality of alternating upstream folds and downstream folds; and a wall connecting the upstream folds to the downstream folds; and cutting 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.
Claim 21
Dependent Claim
16 words
The method of claim 17 further comprising inverting the downstream fold between each pair of slits.
Claim 22
Dependent Claim
22 words
The method of claim 18 wherein the step of inverting further comprises partially collapsing the first media member to a corrugated state.
Claim 23
Dependent Claim
24 words
The method of claim 17 wherein the first media member further comprises hinge means for connecting the pleat to a perimeter of the aperture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-09-14 | 2008-03-15 | 2008-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-09-14 | 2012-03-15 | 2012-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-09-14 | 2016-03-15 | 2016-09-14 | $7700.00 | Window Closed / Lapsed |