US4845073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal catalyst carrier body having two dissimilarly corrugated sheet-metal layers
Assignee: Vitesco Technologies Lohmar Verwaltungs GmbH
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Filing: 1988-01-15
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Granted: 1989-07-04
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Expires: 2008-01-15
Abstract
Abstract A metal catalyst carrier body includes first and second differently corrugated sheet-metal layers being alternatingly wound defining conduits therebetween through which gas flows. The first sheet-metal layer has a simple first corrugation with a periodicity λ 1 and an amplitude A 1 primarily determining the size of the conduits. The second sheet-metal layer has a second corrugation with a periodicity λ 2 and an amplitude A 2 . λ 2 =(n.λ 1 )/m, where n=1, 2 or 3; m=1, 2, 3, 4, 5 or 6; and m is ≧n, forming a multiplicity of periodically recurring oculating contact points having the same direction of curvature. Considering the shape and periodicity of the corrugations, the amplitude A 2 is smaller than the amplitude A 1 by at least an amount sufficient to cause the curvature of the first sheet-metal layer at the contact points to be at least substantially as large as the curvature of the second sheet-metal layer at the contact points.
Inventors
- 👤 Theodor Cyron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:12
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; F01N3/2814; B; B01; B01J; B01J35/00; B01J35/50; B01J35/56; F01N2330/00; F01N2330/02; F01N2330/30; F01N2330/32; F01N2330/321; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/1241
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
166 words
Metal catalyst carrier body, consisting essentially of first and second differently corrugated sheet-metal layers being alternatingly wound defining conduits therebetween through which gas flows, said first sheet-metal layer having a simple first corrugation with a periodicity λ 1 and an amplitude A 1 primarily determining the size of said conduits, said second sheet-metal layer having a second corrugation with a periodicity λ 2 and an amplitude A 2 , wherein: (a) λ 2 =n·λ 1 /m where n=1, 2 or 3; m=1, 2, 3, 4, 5 or 6; and m is ≧n, forming a multiplicity of periodically recurring oculating contact points having the same direction of curvature; and (b) considering the shape and periodicity of said corrugations, said amplitude A 2 being smaller than said amplitude A 1 by at least an amount sufficient to cause the curvature of said first sheet-metal layer at said contact points to be at least substantially as large as the curvature of said second sheet-metal layer at said contact points.
Claim 2
Dependent Claim
166 words
Metal catalyst carrier body, consisting essentially of first and second differently corrugated sheet-metal layers being alternatingly wound defining conduits therebetween through which gas flows, said first sheet-metal layer having a simple first corrugation with a periodicity λ 1 and an amplitude A 1 primarily determining the size of said conduits, said second sheet-metal layer having a second corrugation with a periodicity λ 2 and an amplitude A 2 , wherein: (a) λ 2 =n·λ 1 /m where n=1, 2 or 3; m=1, 2, 3, 4, 5 or 6; and m is ≧n, forming a multiplicity of periodically recurring oculating contact points having the same direction of curvature; and (b) considering the shape and periodicity of said corrugations, said amplitude A 2 being smaller than said amplitude A 1 by at least an amount sufficient to cause the curvature of said first sheet-metal layer at said contact points to be at least substantially as large as the curvature of said second sheet-metal layer at said contact points.
Claim 3
Dependent Claim
27 words
Catalyst carrier body according to claim 1, wherein said corrugations are substantially sinusoidal, and: (a) λ 2 =λ 1 /2 and (b) A 2 ≦A 1 /2.
Claim 4
Dependent Claim
14 words
Catalyst carrier body according to claim 2, wherein A 2 is ≦A 1 /4.
Claim 5
Dependent Claim
14 words
Catalyst carrier body according to claim 2, wherein A 2 is ≦A 1 /8.
Claim 6
Dependent Claim
21 words
Catalyst carrier body according to claim 1, wherein: (a) λ 2 =λ 1 /3 and (b) A 2 ≦A 1 /3.
Claim 7
Dependent Claim
45 words
Catalyst carrier body according to claim 1, wherein said sheet-metal layers have ends defining end surfaces of the catalyst carrier body, and said ends of said sheet-metal layers at least at one of said end surfaces being at least partly brazed at said contact points.
Claim 8
Dependent Claim
45 words
Catalyst carrier body according to claim 2, wherein said sheet-metal layers have ends defining end surfaces of the catalyst carrier body, and said ends of said sheet-metal layers at least at one of said end surfaces being at least partly brazed at said contact points.
Claim 9
Dependent Claim
45 words
Catalyst carrier body according to claim 3, wherein said sheet-metal layers have ends defining end surfaces of the catalyst carrier body, and said ends of said sheet-metal layers at least at one of said end surfaces being at least partly brazed at said contact points.
Claim 10
Dependent Claim
45 words
Catalyst carrier body according to claim 4, wherein said sheet-metal layers have ends defining end surfaces of the catalyst carrier body, and said ends of said sheet-metal layers at least at one of said end surfaces being at least partly brazed at said contact points.
Claim 11
Dependent Claim
45 words
Catalyst carrier body according to claim 5, wherein said sheet-metal layers have ends defining end surfaces of the catalyst carrier body, and said ends of said sheet-metal layers at least at one of said end surfaces being at least partly brazed at said contact points.
Claim 12
Dependent Claim
41 words
Catalyst carrier body according to claim 1, wherein said sheet-metal layers have inner and outer surfaces, and said contact points are disposed on said inner surface of said first sheet-metal layer and on said outer surface of said second sheet-metal layer.
Claim 13
Dependent Claim
41 words
Catalyst carrier body according to claim 2, wherein said sheet-metal layers have inner and outer surfaces, and said contact points are disposed on said inner surface of said first sheet-metal layer and on said outer surface of said second sheet-metal layer.
Claim 14
Dependent Claim
41 words
Catalyst carrier body according to claim 3, wherein said sheet-metal layers have inner and outer surfaces, and said contact points are disposed on said inner surface of said first sheet-metal layer and on said outer surface of said second sheet-metal layer.
Claim 15
Dependent Claim
41 words
Catalyst carrier body according to claim 4, wherein said sheet-metal layers have inner and outer surfaces, and said contact points are disposed on said inner surface of said first sheet-metal layer and on said outer surface of said second sheet-metal layer.
Claim 16
Dependent Claim
41 words
Catalyst carrier body according to claim 5, wherein said sheet-metal layers have inner and outer surfaces, and said contact points are disposed on said inner surface of said first sheet-metal layer and on said outer surface of said second sheet-metal layer.
Claim 17
Dependent Claim
41 words
Catalyst carrier body according to claim 6, wherein said sheet-metal layers have inner and outer surfaces, and said contact points are disposed on said inner surface of said first sheet-metal layer and on said outer surface of said second sheet-metal layer.
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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) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |