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US4976103A
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Metal-made carrier body for carrying thereon exhaust gas cleaning catalyst
Assignee: USUI KOKUSAI SANGYO 131-2 NAGASAWA SHIMIZU-CHO SUNTO-GUN SHIZUOKA-KEN JAPAN KK
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Filing: 1989-06-16
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Granted: 1990-12-11
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Expires: 2009-06-16
Abstract
Abstract A metal-made carrier body is provided for carrying thereon an exhaust gas cleaning catalyst. The carrier body is formed by superposing a sheet-like metal band made of a thin metal sheet and a corrugated band made from another thin metal sheet one over the other in a contiguous relation into a multi-layered composite body defining many network-patterned gas flow passages along a central axis thereof and then enclosing the multi-layered composite body within a cylindrical metal casing. The cylindrical metal casing has a double-layer structure composed of an inner portion made of a metal material having a coefficient of thermal expansion similar to that of the constituent members of the multi-layered composite body and an outer portion made of another metal material having greater heat- and corrosion-resistance than the metal material of the inner portion.
Inventors
- 👤 Kazunori Takikawa
- 👤 Haruo Serizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:50
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; F01N3/2839; F01N3/2842; B; B01; B01J; B01J35/00; B01J35/50; B01J35/56; F01N2330/00; F01N2330/02; F01N2530/00; F01N2530/02; F01N2530/04; F01N2530/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
A metal-made carrier body for carrying thereon an exhaust gas cleaning catalyst, said carrier body having been formed by superposing a sheet-like metal band made of a thin metal sheet and a corrugated band made from another thin metal sheet one over the other in a contiguous relation into a multi-layered composite body defining many network-patterned gas flow passages along a central axis thereof, and then enclosing the multi-layered composite body within a cylindrical metal casing, characterized in that the cylindrical metal casing has a double-layer structure composed of an inner portion made of a metal material having a coefficient of thermal expansion similar to that of the constituent members of the multi-layered composite body and an outer portion made of another metal material having greater heat- and corrosion-resistance than the metal material of the inner portion.
Claim 2
Dependent Claim
137 words
A metal-made carrier body for carrying thereon an exhaust gas cleaning catalyst, said carrier body having been formed by superposing a sheet-like metal band made of a thin metal sheet and a corrugated band made from another thin metal sheet one over the other in a contiguous relation into a multi-layered composite body defining many network-patterned gas flow passages along a central axis thereof, and then enclosing the multi-layered composite body within a cylindrical metal casing, characterized in that the cylindrical metal casing has a double-layer structure composed of an inner portion made of a metal material having a coefficient of thermal expansion similar to that of the constituent members of the multi-layered composite body and an outer portion made of another metal material having greater heat- and corrosion-resistance than the metal material of the inner portion.
Claim 3
Dependent Claim
44 words
The metal-made carrier body as claimed in claim 1, wherein the cylindrical metal casing is made of a clad steel having ferritic stainless steel as the metal material of the inner portion and austenitic stainless steel as the metal material of the outer portion.
Claim 4
Dependent Claim
36 words
The metal-made carrier body as claimed in claim 1, wherein the metal material of the inner portion of the cylindrical metal casing and the metal material of the outer portion thereof are brazed to each other.
Claim 5
Dependent Claim
19 words
The metal-made carrier body as claimed in claim 1, wherein the multi-layered composite body is in a spiral form.
Claim 6
Dependent Claim
19 words
The metal-made carrier body as claimed in claim 1, wherein the multi-layered composite body is in a laminate form.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |