US4987034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-efficiency metal-made carrier body for exhaust gas cleaning catalyst
Assignee: Usui Kokusai Sangyo Kaisha Ltd
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Filing: 1990-04-04
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Granted: 1991-01-22
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Expires: 2010-04-04
Abstract
Abstract Disclosed herein is an exhaust gas cleaning device which is suitable for arrangement at an intermediate point in an exhaust gas system of an automotive vehicle and has good efficiency. The exhaust gas cleaning device includes a metal-made carrier body for an exhaust gas cleaning catalyst. The carrier body is composed of a multi-layered composite body by superposing one over the other at least one planar metal band made of a thin metal sheet and at least one corrugated metal band made of another thin metal sheet and defining many network-patterned gas flow passages along a central axis thereof to allow an exhaust gas to axially flow as streams through the gas flow passages. At least one of the bands defines many holes and many raised portions, preferably, ridges around or near the respective holes. As an alternative, at least one of the bands is made of a metal wire net.
Inventors
- 👤 Yuzo Hitachi
- 👤 Kazunori Takikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:44
CPC Classifications
F; F01; F01N; F01N3/00; B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/9454; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; F01N3/2821; B01J; B01J35/00; B01J35/50; B01J35/56; F01N2330/00; F01N2330/02; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/1234; Y10T428/12361; Y10T428/12368; Y10T428/1241; Y10T428/12444
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
In a metal carrier body for an exhaust gas cleaning catalyst, said carrier body comprising a multi-layered composite body formed by superimposing one over the other at least one planar metal band made of a thin metal sheet and at least one corrugated metal band made of another thin metal sheet and defining many network-patterned gas flow passages along a central axis thereof to allow an exhaust gas to axially flow as streams through the gas flow passages, the improvement wherein at least one of said bands includes a plurality of through-holes therein having raised portions around or adjacent said through-holes for creating turbulent flow of exhaust gas through said carrier body said through-holes and raised portions being arranged and dimensioned so as to preclude interlocking between adjacent metal bands thereby.
Claim 2
Dependent Claim
131 words
In a metal carrier body for an exhaust gas cleaning catalyst, said carrier body comprising a multi-layered composite body formed by superimposing one over the other at least one planar metal band made of a thin metal sheet and at least one corrugated metal band made of another thin metal sheet and defining many network-patterned gas flow passages along a central axis thereof to allow an exhaust gas to axially flow as streams through the gas flow passages, the improvement wherein at least one of said bands includes a plurality of through-holes therein having raised portions around or adjacent said through-holes for creating turbulent flow of exhaust gas through said carrier body said through-holes and raised portions being arranged and dimensioned so as to preclude interlocking between adjacent metal bands thereby.
Claim 3
Dependent Claim
15 words
The metal carrier body as claimed in claim 1, wherein said raised portions comprise ridges.
Claim 4
Dependent Claim
25 words
The metal carrier body as claimed in claim 2, wherein said ridges are arranged with lengths thereof aligned at right angles to said central axis.
Claim 5
Dependent Claim
45 words
The metal carrier body as claimed in claim 1, wherein said metal carrier body comprises two metal bands, one of said bands including a plurality of through-holes therein having raised portions around or adjacent said through-holes and said other band comprising a metal wire net.
Claim 6
Dependent Claim
45 words
The metal-made carrier body as claimed in claim 1, wherein said metal carrier body comprises two metal bands, one of said bands includes a plurality of through-holes therein having raised portions around or adjacent said through-holes and said other band comprising a perforated metal sheet.
Claim 7
Dependent Claim
27 words
The metal-made carrier body as claimed in claim 1, wherein each of said bands includes a plurality of through-holes having raised portions around or adjacent said through-holes.
Claim 8
Dependent Claim
49 words
The metal-made carrier body as claimed in claim 1, wherein said multi-layered structure is obtained by superimposing said bands one over the other to establish contacts therebetween and then rolling the thus-superposed bands together into a spiral form to define said gas flow passages along said central axis thereof.
Claim 9
Dependent Claim
39 words
The metal-made carrier body as claimed in claim 1, wherein said multi-layered structure is obtained by superimposing said bands one over the other in layers, whereby said multi-layered structure defines said gas flow passages along said central axis thereof.
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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) | 1994-01-21 | 1994-07-23 | 1995-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-21 | 1998-07-23 | 1999-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-21 | 2002-07-23 | 2003-01-22 | $7700.00 | Window Closed / Lapsed |