US4381590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing a catalytic reactor carrier matrix
Assignee: Vitesco Technologies Lohmar Verwaltungs GmbH
•
Filing: 1980-06-04
•
Granted: 1983-05-03
•
Expires: 2000-06-04
Abstract
Abstract A carrier matrix for use in the manufacture of a catalytic reactor for the purification of exhaust gases in an internal combustion engine of a motor vehicle is prepared by joining in wound form a corrugated steel sheet and a generally flat steel sheet, the sheets being joined in locations where they contact one another by the use of solder or brazing material. In one embodiment solder is applied in spots along the tops of the arches of the corrugated sheet, and after coiling the solder is activated by heating. In another embodiment, coiling is first carried out and then soldering is accomplished by the application of solder into one or both end faces of the coil.
Inventors
- 👤 Manfred Nonnenmann
- 👤 Heinrich Oltmanns
- 👤 Manfred Hohhausel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:07
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; B23K1/0014; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; F01N3/2839; F01N3/2842; F01N2330/00; F01N2330/02; F01N2330/04; F01N2350/00; F01N2450/00; F01N2450/22; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49345; Y10T29/496; Y10T29/49604
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
176 words
In a method for manufacturing a carrier or supporting matrix for a catalytic reactor designed for cleaning or purifying the exhaust gases in an internal combustion engine of a motor vehicle, the reactor comprising high temperature resistant steel sheets coated with a catalyst material, said steel sheets comprising a first relatively flat sheet and a second corrugated sheet alternately disposed in layers, the individual layers of the steel sheets being soldered together, the improvement comprising: (a) coiling the flat and the corrugated steel sheets to form a cylindrical honeycomb element; (b) degreasing and/or staining the honeycomb element; (c) uniformly applying a predetermined amount of solder to one or both end faces of the wound-up honeycomb element so that solder is present only in the vicinity of the end faces and a substantial length of the honeycomb element intermediate the end faces is free of solder; and (d) thereafter simultaneously soldering together all the layers with respect to each other by heating up the matrix with soldering taking place only in the vicinity of the end faces.
Claim 2
Dependent Claim
176 words
In a method for manufacturing a carrier or supporting matrix for a catalytic reactor designed for cleaning or purifying the exhaust gases in an internal combustion engine of a motor vehicle, the reactor comprising high temperature resistant steel sheets coated with a catalyst material, said steel sheets comprising a first relatively flat sheet and a second corrugated sheet alternately disposed in layers, the individual layers of the steel sheets being soldered together, the improvement comprising: (a) coiling the flat and the corrugated steel sheets to form a cylindrical honeycomb element; (b) degreasing and/or staining the honeycomb element; (c) uniformly applying a predetermined amount of solder to one or both end faces of the wound-up honeycomb element so that solder is present only in the vicinity of the end faces and a substantial length of the honeycomb element intermediate the end faces is free of solder; and (d) thereafter simultaneously soldering together all the layers with respect to each other by heating up the matrix with soldering taking place only in the vicinity of the end faces.
Claim 3
Dependent Claim
44 words
A method according to claim 1, comprising applying a binding agent or an adhesive only to the vicinity of the end faces prior to the application of the solder, wherein the solder is pulverulent solder and is applied by way of a distributing device.
Claim 4
Dependent Claim
15 words
A method according to claim 2, comprising employing a strainer for distributing the pulverulent solder.
Claim 5
Dependent Claim
18 words
A method according to claim 2 or 3, comprising employing a shaking device for distributing the pulverulent solder.
Claim 6
Dependent Claim
15 words
A method according to claim 2, comprising employing an atomizer for distributing the pulverulent solder.
Claim 7
Dependent Claim
44 words
A method according to claim 1, comprising dipping one or both end faces of the wound-up honeycomb element into a binding agent and then uniformly applying the predetermined amount of solder through a strainer in the form of a powder over the binding agent.
Claim 8
Dependent Claim
39 words
A method according to claim 1, comprising applying a soldering paste consisting of a solder powder and binding agent having a predetermined viscosity by way of a roller to at least one end face of the wound-up honeycomb element.
Claim 9
Dependent Claim
23 words
A method according to claim 1, comprising dipping at least one end face of the wound-up honeycomb element into a liquid soldering paste.
Claim 10
Dependent Claim
26 words
A method according to claim 1, comprising pressing a solder foil having a specific thickness into at least one end face of the wound-up honeycomb element.
Claim 11
Dependent Claim
29 words
A method according to claim 1, comprising injecting a predetermined amount of solder into an end face of the wound-up honeycomb element by means of a solder spraying gun.
Claim 12
Dependent Claim
40 words
A method according to claim 1, comprising dipping at least one end face of the wound-up honeycomb element having been heated in soldering temperature into molten solder, in vacuo or in a protective gas atmosphere, up to a specific depth.
Claim 13
Dependent Claim
41 words
A method according to claim 1, comprising melting down an auxiliary material by means of an electric arc, and thereafter spraying said auxiliary material by means of a compressed-air jet into at least one end face of the wound-up honeycomb element.
References Cited (Backward Citations)
GB528385A
Cited
US2426653A
Cited
US2807074A
Cited
US3009241A
Cited
GB937466A
Cited
US3222775A
Cited
US3208131A
Cited
US3139679A
Cited
US3479731A
Cited
US3501013A
Cited
US3736653A
Cited
US3722071A
Cited
GB1452982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |