Patent US4619676A successfully refreshed from Google Patents.
US4619676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter cartridge for filtering apparatuses
Assignee: Individual
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Filing: 1984-03-28
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Granted: 1986-10-28
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Expires: 2004-03-28
Abstract
Abstract Filter cartridge for filtering apparatuses for removing impurities from hot and/or highly pressurized flowing gases, with zig-zag formed, folded, gas-penetrated filter material whose part surfaces caused by the folding, between the fold lines, are arranged in relatively close juxtaposition to each other, wherein a preferably thin-walled plate 15 is arranged in the space between two respectively adjacent part surface 12, 13 of the filter material 11, with said plate having one straight-formed edge 16 lying in the inside of the fold 14 and one opposite lying zig-zag formed edge 17, and the bend or crest lines 18 between the two edges 16, 17 rise steadily towards the medial plane 19 of the plate 15.
Inventors
- 👤 Ernst Turck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:32
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/523; B01D46/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A filter cartridge for filtering apparatuses for removing impurities from hot and/or highly pressurized flowing gases, with zig-zag formed, gas-penetrated filter material folded at acute angles, whose part surfaces caused by the folding, between the fold lines, are arranged in relatively close juxtaposition to each other, characterized in that: one thin-walled strip 15 is disposed and arranged in the spaces between each two adjacent part surfaces 12, 13 of the filter material 11, said thin-walled strip 15 having one straight-formed edge 16 lying in the inside of the fold 14 and one opposite lying zig-zag formed edge 17, and in that, relative to the medial plane 19 of said thin-walled strip 15, the bend or crest lines 18 rise steadily from said one straight formed edge 16 toward said zig-zag formed edge.
Claim 2
Dependent Claim
132 words
A filter cartridge for filtering apparatuses for removing impurities from hot and/or highly pressurized flowing gases, with zig-zag formed, gas-penetrated filter material folded at acute angles, whose part surfaces caused by the folding, between the fold lines, are arranged in relatively close juxtaposition to each other, characterized in that: one thin-walled strip 15 is disposed and arranged in the spaces between each two adjacent part surfaces 12, 13 of the filter material 11, said thin-walled strip 15 having one straight-formed edge 16 lying in the inside of the fold 14 and one opposite lying zig-zag formed edge 17, and in that, relative to the medial plane 19 of said thin-walled strip 15, the bend or crest lines 18 rise steadily from said one straight formed edge 16 toward said zig-zag formed edge.
Claim 3
Dependent Claim
42 words
A filter cartridge according to claim 1, characterized in that the part surfaces 20, 21 of the folds of the thin-walled strip 15, enclose an angle 22 between about 90° and about 120° in the area of the zig-zag formed edge 17.
Claim 4
Dependent Claim
32 words
A filter cartridge according to claim 1 or 2, characterized in that the thin-walled strips 15 are placed in the folds 14 open to the discharge side of the filter material 11.
Claim 5
Dependent Claim
30 words
A filter cartridge according to claim 1, characterized in that the thin-walled strips 15 are placed in the folds 14 open to the approach side of the filter material 11.
Claim 6
Dependent Claim
35 words
A filter cartridge according to claim 1, characterized in that the thin-walled strips 15 are placed in the folds 14 open to both the approach side and the discharge side of the filter material 11.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |