US5173267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst with a double casing system
Assignee: Vitesco Technologies Lohmar Verwaltungs GmbH
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Filing: 1991-04-11
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Granted: 1992-12-22
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Expires: 2011-04-11
Abstract
Abstract An encased catalyst, especially for motor vehicles, includes at least one metal honeycomb catalyst carrier body through which exhaust gas can pass. At least one inner jacket tube carries the at least one catalyst carrier body. An outer jacket tube approximately concentrically surrounds the at least one inner jacket tube at a distance. The at least one inner jacket tube and the outer jacket tube have end regions and are firmly joined together in one of the end regions. The at least one inner jacket tube is freely longitudinally expandable in the outer jacket tube.
Inventors
- 👤 Wolfgang Maus
- 👤 Ludwig Wieres
- 👤 Rainer Sahler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:13
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2842; F01N2260/00; F01N2260/10; F01N2330/00; F01N2330/02; F01N2350/00; F01N2470/00; F01N2470/24; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
160 words
A catalytic converter, comprising: a) at least one metal honeycomb catalyst carrier body through which exhaust gas can pass; b) at least one inner jacket tube having first and second end regions, said at least one catalyst carrier body being received in said at least one inner jacket tube; c) an outer jacket tube approximately concentrically surrounding said at least one inner jacket tube and having first and second end regions; d) said first end region of said at least one inner jacket tube being firmly joined to said first end region of said outer jacket tube; e) said at least one inner jacket tube being freely longitudinally expandable in said outer jacket tube; and f) a sliding seat contacting said second end region of said outer jacket tube, said second end region of said at least one inner jacket tube being retained in said sliding seat, said sliding seat being a continuous circumferential bead in said outer jacket tube.
Claim 2
Dependent Claim
160 words
A catalytic converter, comprising: a) at least one metal honeycomb catalyst carrier body through which exhaust gas can pass; b) at least one inner jacket tube having first and second end regions, said at least one catalyst carrier body being received in said at least one inner jacket tube; c) an outer jacket tube approximately concentrically surrounding said at least one inner jacket tube and having first and second end regions; d) said first end region of said at least one inner jacket tube being firmly joined to said first end region of said outer jacket tube; e) said at least one inner jacket tube being freely longitudinally expandable in said outer jacket tube; and f) a sliding seat contacting said second end region of said outer jacket tube, said second end region of said at least one inner jacket tube being retained in said sliding seat, said sliding seat being a continuous circumferential bead in said outer jacket tube.
Claim 3
Dependent Claim
21 words
The catalytic converter according to claim 1, wherein said at least one inner jacket tube includes at least one perforated portion.
Claim 4
Dependent Claim
19 words
The catalytic converter according to claim 1, wherein said at least one inner jacket tube has non-perforated end regions.
Claim 5
Dependent Claim
32 words
The catalytic converter according to claim 1, including connecting pieces slipped onto each of said first and second end regions of said outer jacket tube and joined to said outer jacket tube.
Claim 6
Dependent Claim
20 words
The catalytic converter according to claim 4, wherein said connecting pieces are joined to said outer jacket tube by butt-welding.
Claim 7
Dependent Claim
32 words
The catalytic converter according to claim 4, wherein one of said connecting pieces, said outer jacket tube and said at least one inner jacket tube are joined by a single continuous circumferential.
Claim 8
Dependent Claim
29 words
The catalytic converter according to claim 1, wherein said outer jacket tube and said at least one inner jacket tube are spaced apart by approximately 1 to 5 mm.
Claim 9
Dependent Claim
162 words
A catalytic converter, comprising: a) at least one metal honeycomb catalyst carrier body through which exhaust gas can pass; b) at least one inner jacket tube having first and second end regions, said at least one catalyst carrier body being received in said at least one inner jacket tube; c) an outer jacket tube approximately concentrically surrounding said at least one inner jacket tube and having first and second end regions; d) said first end region of said at least one inner jacket tube being firmly joined to said first end region of said outer jacket tube; e) said at least one inner jacket tube being freely longitudinally expandable in said outer jacket tube; and f) a sliding seat contacting said second end region of said outer jacket tube, said second end region of said at least one inner jacket tube being retained in said sliding seat, wherein said sliding seat is formed of individual inner beads in said outer jacket tube.
Claim 10
Dependent Claim
162 words
A catalytic converter, comprising: a) at least one metal honeycomb catalyst carrier body through which exhaust gas can pass; b) at least one inner jacket tube having first and second end regions, said at least one catalyst carrier body being received in said at least one inner jacket tube; c) an outer jacket tube approximately concentrically surrounding said at least one inner jacket tube and having first and second end regions; d) said first end region of said at least one inner jacket tube being firmly joined to said first end region of said outer jacket tube; e) said at least one inner jacket tube being freely longitudinally expandable in said outer jacket tube; and f) a sliding seat contacting said second end region of said outer jacket tube, said second end region of said at least one inner jacket tube being retained in said sliding seat, wherein said sliding seat is formed of individual inner beads in said outer jacket tube.
Claim 11
Dependent Claim
147 words
A catalytic converter, comprising: a) at least one metal honeycomb catalyst carrier body through which exhaust gas can pass; b) at least one inner jacket tube having first and second end regions, said at least one catalyst carrier body being received in said at least one inner jacket tube; c) an outer jacket tube approximately concentrically surrounding said at least one inner jacket tube and having first and second end regions; d) said first end region of said at least one inner jacket tube being firmly joined to said first end region of said outer jacket tube; e) said at least one inner jacket tube being freely longitudinally expandable in said outer jacket tube; and f) a sliding seat contacting said second end region of said outer jacket tube, said second end region of said at least one inner jacket tube being retained in said sliding seat.
Claim 12
Dependent Claim
147 words
A catalytic converter, comprising: a) at least one metal honeycomb catalyst carrier body through which exhaust gas can pass; b) at least one inner jacket tube having first and second end regions, said at least one catalyst carrier body being received in said at least one inner jacket tube; c) an outer jacket tube approximately concentrically surrounding said at least one inner jacket tube and having first and second end regions; d) said first end region of said at least one inner jacket tube being firmly joined to said first end region of said outer jacket tube; e) said at least one inner jacket tube being freely longitudinally expandable in said outer jacket tube; and f) a sliding seat contacting said second end region of said outer jacket tube, said second end region of said at least one inner jacket tube being retained in said sliding seat.
Claim 13
Dependent Claim
152 words
A catalytic converter, comprising: a) at least one metal honeycomb catalyst carrier body through which exhaust gas can pass; b) at least one inner jacket tube formed of ferritic material and having first and second end regions, said at least one catalyst carrier body being received in said at least one inner jacket tube; c) an outer jacket tube approximately concentrically surrounding said at least one inner jacket tube and having first and second end regions; d) said first end region of said at least one inner jacket tube being firmly joined to said first end region of said outer jacket tube; e) said at least one inner jacket tube being freely longitudinally expandable in said outer jacket tube; and f) a sliding seat contacting said second end region of said outer jacket tube, said second end region of said at least one inner jacket tube being retained in said sliding seat.
Claim 14
Dependent Claim
152 words
A catalytic converter, comprising: a) at least one metal honeycomb catalyst carrier body through which exhaust gas can pass; b) at least one inner jacket tube formed of ferritic material and having first and second end regions, said at least one catalyst carrier body being received in said at least one inner jacket tube; c) an outer jacket tube approximately concentrically surrounding said at least one inner jacket tube and having first and second end regions; d) said first end region of said at least one inner jacket tube being firmly joined to said first end region of said outer jacket tube; e) said at least one inner jacket tube being freely longitudinally expandable in said outer jacket tube; and f) a sliding seat contacting said second end region of said outer jacket tube, said second end region of said at least one inner jacket tube being retained in said sliding seat.
Claim 15
Dependent Claim
149 words
A catalytic converter, comprising: a) a first and second inner jacket tubes each having first and second end regions, and a metal honeycomb catalyst carrier body through which exhaust gas can flow received therein; b) an outer jacket tube approximately concentrically surrounding said first and second inner jacket tubes and having first and second end regions; c) said first end region of said first inner jacket tube being firmly joined to said first end region of said outer jacket tube; d) said first end region of said second inner jacket tube being firmly joined to said second end region of said outer jacket tube; and e) said second end region of said first inner jacket tube and said second end region of said second inner jacket tube being retained one inside the other with a sliding seat for allowing longitudinal expansion of said first and second inner jacket tubes.
Claim 16
Dependent Claim
149 words
A catalytic converter, comprising: a) a first and second inner jacket tubes each having first and second end regions, and a metal honeycomb catalyst carrier body through which exhaust gas can flow received therein; b) an outer jacket tube approximately concentrically surrounding said first and second inner jacket tubes and having first and second end regions; c) said first end region of said first inner jacket tube being firmly joined to said first end region of said outer jacket tube; d) said first end region of said second inner jacket tube being firmly joined to said second end region of said outer jacket tube; and e) said second end region of said first inner jacket tube and said second end region of said second inner jacket tube being retained one inside the other with a sliding seat for allowing longitudinal expansion of said first and second inner jacket tubes.
Claim 17
Dependent Claim
28 words
The catalytic converter according to claim 11, wherein said second end regions of said first and second inner jacket tubes are additionally retained inside said outer jacket tube.
Claim 18
Dependent Claim
21 words
The catalytic converter according to claim 11, wherein said first and second inner jacket tubes are formed of ferritic sheet metal.
Claim 19
Dependent Claim
21 words
The catalytic converter according to claim 11, wherein said first and second inner jacket tubes are formed of perforated sheet metal.
Claim 20
Dependent Claim
22 words
The catalytic converter according to claim 11, wherein said first and second inner jacket tubes are formed of ferritic perforated sheet metal.
Claim 21
Dependent Claim
16 words
The catalytic converter according to claim 11, wherein said catalyst carrier bodies have different axial lengths.
Claim 22
Dependent Claim
23 words
The catalytic converter according to claim 11, wherein said catalyst carrier bodies have a different number of channels per unit of cross-sectional area.
Claim 23
Dependent Claim
27 words
The catalytic converter according to claim 11, wherein said catalyst carrier bodies have different axial lengths and a different number of channels per unit of cross-sectional area.
Claim 24
Dependent Claim
31 words
The catalytic converter according to claim 11, wherein said catalyst carrier bodies are spaced apart defining a space therebetween for making the exhaust gases turbulent and for compensating for longitudinal expansions.
Claim 25
Dependent Claim
27 words
The catalytic converter according to claim 19, wherein said first and second catalyst carrier bodies define an axial length of space between approximately 1 and 3 cm.
Claim 26
Dependent Claim
42 words
The catalytic converter according to claim 11, wherein said second end region of said first inner jacket tube has a taper protruding several millimeters into the interior of said second end region of said second inner jacket tube in a cold state.
Claim 27
Dependent Claim
29 words
The catalytic converter according to claim 11, wherein said outer jacket tube and said first and second inner jacket tubes are spaced apart by approximately 1 to 6 mm.
Claim 28
Dependent Claim
32 words
The catalytic converter according to claim 11, including connecting pieces slipped onto each of said first and second end regions of said outer jacket tube and joined to said outer jacket tube.
Claim 29
Dependent Claim
20 words
The catalytic converter according to claim 23, wherein said connecting pieces are joined to said outer jacket tube by butt-welding.
Claim 30
Dependent Claim
34 words
The catalytic converter according to claim 23, wherein one of said connecting pieces, said outer jacket tube and said at least one inner jacket tube are joined by a single continuous circumferential weld seam.
Claim 31
Dependent Claim
162 words
A catalytic converter, comprising: a) first and second inner jacket tubes each having first and second end regions, and a metal honeycomb carrier body through which exhaust gas can flow received therein; b) an outer jacket tube approximately concentrically surrounding said first and second inner jacket tubes and having first and second end regions; c) said first end region of said first inner jacket tube being firmly joined to said first end region of said outer jacket tube; d) said first end region of said second inner jacket tube being firmly joined to said second end region of said outer jacket tube; and e) at least one of said second end regions of said first and second inner jacket tubes being retained in said outer jacket tube with at least one sliding seat, and wherein said second end regions of said first and second inner jacket tubes are freely longitudinally expandable ends being guided one inside the other with a sliding seat.
Claim 32
Dependent Claim
162 words
A catalytic converter, comprising: a) first and second inner jacket tubes each having first and second end regions, and a metal honeycomb carrier body through which exhaust gas can flow received therein; b) an outer jacket tube approximately concentrically surrounding said first and second inner jacket tubes and having first and second end regions; c) said first end region of said first inner jacket tube being firmly joined to said first end region of said outer jacket tube; d) said first end region of said second inner jacket tube being firmly joined to said second end region of said outer jacket tube; and e) at least one of said second end regions of said first and second inner jacket tubes being retained in said outer jacket tube with at least one sliding seat, and wherein said second end regions of said first and second inner jacket tubes are freely longitudinally expandable ends being guided one inside the other with a sliding seat.
Claim 33
Dependent Claim
29 words
The catalytic converter according to claim 26, wherein said outer jacket tube and said first and second inner jacket tubes are spaced apart by approximately 1 to 5 mm.
Claim 34
Dependent Claim
21 words
The catalytic converter according to claim 26, wherein said first and second inner jacket tubes are formed of ferritic sheet metal.
Claim 35
Dependent Claim
21 words
The catalytic converter according to claim 26, wherein said first and second inner jacket tubes are formed of perforated sheet metal.
Claim 36
Dependent Claim
22 words
The catalytic converter according to claim 26, wherein said first and second inner jacket tubes are formed of ferritic perforated sheet metal.
Claim 37
Dependent Claim
16 words
The catalytic converter according to claim 26, wherein said catalyst carrier bodies have different axial lengths.
Claim 38
Dependent Claim
23 words
The catalytic converter according to claim 26, wherein said catalyst carrier bodies have a different number of channels per unit of cross-sectional area.
Claim 39
Dependent Claim
27 words
The catalytic converter according to claim 26, wherein said catalyst carrier bodies have different axial lengths and a different number of channels per unit of cross-sectional area.
Claim 40
Dependent Claim
31 words
The catalytic converter according to claim 26, wherein said catalyst carrier bodies are spaced apart defining a space therebetween for making the exhaust gases turbulent and for compensating for longitudinal expansions.
Claim 41
Dependent Claim
27 words
The catalytic converter according to claim 34, wherein said first and second catalyst carrier bodies define an axial length of space between approximately 1 and 3 cm.
Claim 42
Dependent Claim
42 words
The catalytic converter according to claim 26, wherein said second end region of said first inner jacket tube has a taper protruding several millimeters into the interior of said second end region of said second inner jacket tube in a cold state.
Claim 43
Dependent Claim
32 words
The catalytic converter according to claim 26, including connecting pieces slipped onto each of said first and second end regions of said outer jacket tube and joined to said outer jacket tube.
Claim 44
Dependent Claim
20 words
The catalytic converter according to claim 26, wherein said connecting pieces are joined to said outer jacket tube by butt-welding.
Claim 45
Dependent Claim
29 words
The catalytic converter according to claim 37, wherein one of said connecting pieces, said outer jacket tube and said are joined by a single continuous circumferential weld seam. said
References Cited (Backward Citations)
US4072471A
Cited
US4235846A
Cited
US4160010A
Cited
US4158037A
Cited
SU731005A1
Cited
EP0177479A1
Cited
US4775518A
Cited
EP0212243A1
Cited
EP0245737B1
Cited
EP0314129A2
Cited
US4976103A
Cited
EP0336115A1
Cited
DE8812762U1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-22 | 1996-06-22 | 1996-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-22 | 2000-06-22 | 2000-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-22 | 2004-06-22 | 2004-12-22 | $7700.00 | Window Closed / Lapsed |