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US4847966A
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Method of making a matrix for a catalytic reactor for the purification of exhaust gas
Assignee: Vitesco Technologies Lohmar Verwaltungs GmbH
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Filing: 1987-09-17
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Granted: 1989-07-18
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Expires: 2007-09-17
Abstract
Abstract A matrix for a catalytic reactor for the purification of exhaust gas as well as a process and an arrangement for producing this matrix which has a corrugated metal strip, wound or folded, or a smooth strip and a corrugated metal strip that are wound or folded into several adjacent layers. The wound or folded layers are soldered together with one another. Radially extending indentations of small dimensions are provided at the points of the corrugated strip that border on the adjacent layers. In these indentations soldering material is received.
Inventors
- 👤 Reinhold Kuchelmeister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:39
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/20; B21; B21D; B21D53/00; B21D53/88; B23K1/0008; B23K1/0014; B23K3/00; B23K3/06; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; F01N2330/00; F01N2330/02; F01N2330/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49345; Y10T29/4998
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
146 words
A process for producing a matrix for a catalytic reactor for the purification of exhaust gas for internal combustion engines, having at least one of a corrugated strip and a smooth metal strip that is wound into several layers which are adjacent to one another and at least partially soldered to one another by soldering material, the corrugated strip including small indentations at areas of the corrugated strip that border on the adjacent layers, these indentations receiving said soldering material, in which the matrix is produced by winding, the process comprising the steps: continuously winding-in fed soldering wire during said winding of said matrix into said layers to be soldered together under a tensile stress such that said soldering wire presses the indentations directly into said corrugated strip due to radial forces caused by said tensile stress; and subsequently liquefying said soldering material in a furnace.
Claim 2
Dependent Claim
146 words
A process for producing a matrix for a catalytic reactor for the purification of exhaust gas for internal combustion engines, having at least one of a corrugated strip and a smooth metal strip that is wound into several layers which are adjacent to one another and at least partially soldered to one another by soldering material, the corrugated strip including small indentations at areas of the corrugated strip that border on the adjacent layers, these indentations receiving said soldering material, in which the matrix is produced by winding, the process comprising the steps: continuously winding-in fed soldering wire during said winding of said matrix into said layers to be soldered together under a tensile stress such that said soldering wire presses the indentations directly into said corrugated strip due to radial forces caused by said tensile stress; and subsequently liquefying said soldering material in a furnace.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein said indentations are configured to extend radially with respect to a winding axis when in a completed matrix.
Claim 4
Dependent Claim
30 words
A process according to claim 2, wherein said winding-in of soldering wire includes winding the soldering wire in a heleical pattern into corresponding helical pattern indentations at the corrugated strip.
Claim 5
Dependent Claim
36 words
A process according to claim 2, wherein said winding-in of soldering wire includes winding a plurality of soldering wires simultaneously into a corresponding plurality of indentations spaced axially from one another in the matrix being formed.
Claim 6
Dependent Claim
27 words
A process according to claim 1, wherein said corrugated strip is formed by passing a smooth strip between corrugating rollers with corrugation means for forming said corrugations.
Claim 7
Dependent Claim
28 words
A process according to claim 5, wherein said corrugating rollers are disposed for continually forming the corrugations in said corrugated strip as it is wound into the matrix.
Claim 8
Dependent Claim
34 words
A process according to claim 6, wherein said winding-in of soldering wire includes feeding said soldering wire between a smooth metal strip and a corrugated metal strip being wound together to form said matrix.
Claim 9
Dependent Claim
35 words
A process according to claim 1, further comprising soldering of the matrix to a support shell by said soldering wire disposed in the indentations of the radially outermost layer of corrugated strip forming the matrix.
Claim 10
Dependent Claim
126 words
A process for producing a matrix for a catalytic reactor for the purification of exhaust gas for internal combustion engines, having at least one of a corrugated strip and a smooth metal strip that is wound into several layers which are adjacent to one another and at least partially soldered to one another by soldering material, the corrugated strip including small indentations at areas of the corrugated strips that border on the adjacent layers, these indentations receiving said soldering material, in which the matrix is produced by winding, the process comprising the steps: providing said corrugated strip with indentations before said winding; placing at least one of a soldering wire or a soldering foil strip into said indentations during said winding; and liquefying said soldering material.
Claim 11
Dependent Claim
126 words
A process for producing a matrix for a catalytic reactor for the purification of exhaust gas for internal combustion engines, having at least one of a corrugated strip and a smooth metal strip that is wound into several layers which are adjacent to one another and at least partially soldered to one another by soldering material, the corrugated strip including small indentations at areas of the corrugated strips that border on the adjacent layers, these indentations receiving said soldering material, in which the matrix is produced by winding, the process comprising the steps: providing said corrugated strip with indentations before said winding; placing at least one of a soldering wire or a soldering foil strip into said indentations during said winding; and liquefying said soldering material.
Claim 12
Dependent Claim
25 words
A process according to claim 9, wherein said indentations are configured to extend radially with respect to a winding axis when in a completed matrix.
Claim 13
Dependent Claim
26 words
A process according to claim 9, wherein said indentations are formed by passing a smooth strip between corrugating rollers with indenting means for forming said indentation.
Claim 14
Dependent Claim
28 words
A process according to claim 11, wherein said corrugating rollers are disposed for continually forming the corrugations in said corrugated strip as it is wound into the matrix.
Claim 15
Dependent Claim
34 words
A process to claim 9, further comprising soldering of the matrix to a support shell by said soldering material disposed in the indentations of the radially outermost layer of corrugated strip forming the matrix.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |