Patent US4521947A successfully refreshed from Google Patents.
US4521947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing a catalytic reactor carrier matrix
Assignee: Vitesco Technologies Lohmar Verwaltungs GmbH
•
Filing: 1982-09-30
•
Granted: 1985-06-11
•
Expires: 2002-09-30
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
2026-11-01 11:16
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: 7
Claim 1
Independent Claim
239 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 improvements comprising: (a) providing at least a cleaned portion of each of said flat and corrugated steel sheets; (b) applying a binding agent to the flat sheet along selected areas of said cleaned portion thereof; (c) applying a predetermined amount of pulverent solder to the selected areas on which binding agent has been applied, said selected areas being strips extending in the direction of corrugations of the corrugated steel sheets, or at right angles thereto, so that solder is present only in the vicinity of said strips and a substantial area intermediate the strips is free of solder; (d) subsequently coiling the flat and the corrugated steel sheets to form a honeycomb element wherein said selected areas with a predetermined amount of solder thereon are adjacent cleaned portions of the opposing surface of said alternately disposed sheet; and (e) thereafter sumultaneously soldering together all the layers with respect to each other by heating up the matrix such that said solder adheres to said adjacent cleaned portion.
Claim 2
Dependent Claim
239 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 improvements comprising: (a) providing at least a cleaned portion of each of said flat and corrugated steel sheets; (b) applying a binding agent to the flat sheet along selected areas of said cleaned portion thereof; (c) applying a predetermined amount of pulverent solder to the selected areas on which binding agent has been applied, said selected areas being strips extending in the direction of corrugations of the corrugated steel sheets, or at right angles thereto, so that solder is present only in the vicinity of said strips and a substantial area intermediate the strips is free of solder; (d) subsequently coiling the flat and the corrugated steel sheets to form a honeycomb element wherein said selected areas with a predetermined amount of solder thereon are adjacent cleaned portions of the opposing surface of said alternately disposed sheet; and (e) thereafter sumultaneously soldering together all the layers with respect to each other by heating up the matrix such that said solder adheres to said adjacent cleaned portion.
Claim 3
Dependent Claim
28 words
A method according to claim 1, wherein said applying of solder includes applying solder only to narrow strips extending in the longitudinal direction of the flat steel sheet.
Claim 4
Dependent Claim
247 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 improvements comprising: (a) providing at least a cleaned portion of each of said flat and corrugated steel sheets; (b) applying a binding agent to the corrugated sheet along selected areas of said cleaned portion thereof; (c) applying a predetermined amount of pulverent solder to the selected areas on which binding agent has been applied, said selected areas being strips along the tops of the corrugations, said strips extending in the direction of corrugations of the corrugated steel sheets, or at right angles thereto, so that solder is present only in the vicinity of said strips and a substantial area intermediate the strips is free of solder; (d) subsequently coiling the flat and the corrugated steel sheets to form a honeycomb element wherein said selected areas with a predetermined amount of solder thereon are adjacent cleaned portions of the opposing surface of said alternately disposed sheet; and (e) thereafter simultaneously soldering together all the layers with respect to each other by heating up the matrix such that said solder adheres to said adjacent cleaned portion.
Claim 5
Dependent Claim
247 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 improvements comprising: (a) providing at least a cleaned portion of each of said flat and corrugated steel sheets; (b) applying a binding agent to the corrugated sheet along selected areas of said cleaned portion thereof; (c) applying a predetermined amount of pulverent solder to the selected areas on which binding agent has been applied, said selected areas being strips along the tops of the corrugations, said strips extending in the direction of corrugations of the corrugated steel sheets, or at right angles thereto, so that solder is present only in the vicinity of said strips and a substantial area intermediate the strips is free of solder; (d) subsequently coiling the flat and the corrugated steel sheets to form a honeycomb element wherein said selected areas with a predetermined amount of solder thereon are adjacent cleaned portions of the opposing surface of said alternately disposed sheet; and (e) thereafter simultaneously soldering together all the layers with respect to each other by heating up the matrix such that said solder adheres to said adjacent cleaned portion.
Claim 6
Dependent Claim
21 words
Method according to claim 1, wherein the applying of solder includes applying solder over the complete length of each corrugation top.
Claim 7
Dependent Claim
25 words
Method according to claim 1, wherein the applying of solder includes applying solder to one or more parts of the length of each corrugation top.
References Cited (Backward Citations)
US1806738A
Cited
GB191109228A
Cited
US1243654A
Cited
US1451758A
Cited
US2168222A
Cited
US2555125A
Cited
US2573835A
Cited
US2674299A
Cited
US2918028A
Cited
US3009241A
Cited
US3009180A
Cited
US2961222A
Cited
US3006318A
Cited
US3092513A
Cited
US3043721A
Cited
US3110961A
Cited
US3188732A
Cited
US3208131A
Cited
US3162546A
Cited
US3342666A
Cited
US3346933A
Cited
US3338499A
Cited
US3375570A
Cited
US3300836A
Cited
US3469304A
Cited
US3479731A
Cited
US3596346A
Cited
US3656224A
Cited
US3880608A
Cited
US3722071A
Cited
US4065341A
Cited
US4025035A
Cited
US4053969A
Cited
US4098722A
Cited
US4231508A
Cited
US4072262A
Cited
US4223826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |