US4647435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic reactor arrangement including catalytic reactor matrix
Assignee: Vitesco Technologies Lohmar Verwaltungs GmbH
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Filing: 1984-11-15
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Granted: 1987-03-03
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Expires: 2004-11-15
Abstract
Abstract A matrix for a catalytic reactor used for exhaust gas purification in internal combustion engines includes corrugated strips of sheet steel that are coatable with catalyst material. The sheets are folded to produce several layers in a tubular housing which is traversed by a flow of exhaust gases. The individual layers are part of a continuous length or strip of sheet steel which is folded in a meandering or serpentine fashion. A zigzag folding pattern is especially preferred. This arrangement simplifies manufacturing and results in improved radial equalization of exhaust gases. Uniformity of flow profile is improved by cutouts provided in the matrix material.
Inventors
- 👤 Manfred Nonnenmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:33
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2842; F01N3/2803; F01N3/2807; F01N3/281; F01N3/2814; F01N3/2821; F01N2330/00; F01N2330/02; F01N2330/04; F01N2330/30; F01N2330/32; F01N2330/323; F01N2450/00; F01N2450/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/1241; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727; Y10T428/24744
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
Matrix for a catalytic reactor for purifying exhaust gas, said matrix having a longitudinal axis and comprising a corrugated sheet of steel having surfaces coatable with a catalyst material, and two flat steel sheets, arranged respectively on either side of said corrugated sheet, said flat and corrugated sheets being arranged in a plurality of layers, wherein said layers are formed from said flat and corrugated sheets being folded in a serpentine pattern.
Claim 2
Dependent Claim
72 words
Matrix for a catalytic reactor for purifying exhaust gas, said matrix having a longitudinal axis and comprising a corrugated sheet of steel having surfaces coatable with a catalyst material, and two flat steel sheets, arranged respectively on either side of said corrugated sheet, said flat and corrugated sheets being arranged in a plurality of layers, wherein said layers are formed from said flat and corrugated sheets being folded in a serpentine pattern.
Claim 3
Dependent Claim
29 words
Matrix according to claim 1, wherein said serpentine pattern of said layers formed from said flat and corrugated sheets being folded in said serpentine pattern is a zigzag pattern.
Claim 4
Dependent Claim
26 words
Matrix according to claim 2, wherein at least a portion of said layers are of unequal lengths as measured in a transverse direction of said matrix.
Claim 5
Dependent Claim
27 words
Matrix according to claim 3, wherein said single corrugated sheet is provided with predetermined zones of weakness, each of said zones defining a location of a fold.
Claim 6
Dependent Claim
16 words
Matrix according to claim 4, wherein said zones are formed by perforations in said corrugated sheet.
Claim 7
Dependent Claim
27 words
Matrix according to claim 1, wherein said single corrugated sheet is provided with predetermined zones of weakness, each of said zones defining a location of a fold.
Claim 8
Dependent Claim
16 words
Matrix according to claim 6, wherein said zones are formed by perforations in said corrugation sheet.
Claim 9
Dependent Claim
30 words
Matrix according to claim 1, wherein said flat and corrugated steel sheets are provided with cutouts for aiding in equalization of the flow profile of exhaust gases through the matrix.
Claim 10
Dependent Claim
28 words
Matrix according to claim 8, wherein the flow cross-sections of said cutouts comprise more than 5% and less than 30% of the surface area of said flat sheets.
Claim 11
Dependent Claim
22 words
Matrix according to claim 8, wherein said cutouts are oriented so as to be generally transverse to longitudinal axis of said matrix.
Claim 12
Dependent Claim
15 words
Matrix according to claim 8, wherein said cutouts are evenly distributed along said flat sheets.
Claim 13
Dependent Claim
27 words
Matrix according to claim 1, wherein said corrugated sheet is provided with cutouts for aiding in equalization of the flow profile of exhaust gases through the matrix.
Claim 14
Dependent Claim
80 words
A catalytic reactor arrangement for purifying exhaust gas, said arrangement comprising a tubular housing containing a matrix therein, said matrix comprising a corrugated sheet of steel having surfaces coated with a catalyst material, and two flat steel sheets, arranged respectively on either side of said corrugated sheet, said flat and corrugated sheets being arranged in a plurality of layers in said tubular housing, wherein said layers are formed from said flat and corrugated sheets being folded in a serpentine pattern.
Claim 15
Dependent Claim
80 words
A catalytic reactor arrangement for purifying exhaust gas, said arrangement comprising a tubular housing containing a matrix therein, said matrix comprising a corrugated sheet of steel having surfaces coated with a catalyst material, and two flat steel sheets, arranged respectively on either side of said corrugated sheet, said flat and corrugated sheets being arranged in a plurality of layers in said tubular housing, wherein said layers are formed from said flat and corrugated sheets being folded in a serpentine pattern.
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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) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |