Patent US5346675A successfully refreshed from Google Patents.
US5346675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas cleaning apparatus
Assignee: Usui Kokusai Sangyo Kaisha Ltd
•
Filing: 1989-12-12
•
Granted: 1994-09-13
•
Expires: 2009-12-12
Abstract
Abstract An exhaust gas cleaning apparatus comprises one or more honeycomb core bodies for carrying an exhaust gas cleaning catalyst and fitted in a tubular metal casing. The metal casing has an outer wall which is axially expandable and contractible so as to follow the stress due to thermal strains acting on the honeycomb core bodies inside, thereby remarkably improving the apparatus in durability and vibration resistance.
Inventors
- 👤 Masayoshi Usui
- 👤 Haruo Serizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:28
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2842; F01N13/00; F01N13/009; F01N2330/00; F01N2330/02; F01N2350/00; F01N2470/00; F01N2470/12; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y10; Y10S; Y10S55/00; Y10S55/30; Y10T; Y10T29/00; Y10T29/49; Y10T29/49345
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
130 words
An exhaust gas cleaning apparatus comprising: a single honeycomb core body carrying thereon an exhaust gas cleaning catalyst and composed of a sheet band made of a thin metal sheet and a corrugated band made from another thin metal sheet, said sheet band and said corrugated band being superposed one over another so as to have areas of contact therebetween and so as to define many network-patterned gas flow passages along a central longitudinal axis thereof; and a metal casing having a central axis and being opened at opposite ends, said honeycomb core body being inserted in and fixed directly to said metal casing, said metal casing having an outer wall expandable and contractible axially so as to follow stress due to a thermal expansion of said honeycomb core body.
Claim 2
Dependent Claim
130 words
An exhaust gas cleaning apparatus comprising: a single honeycomb core body carrying thereon an exhaust gas cleaning catalyst and composed of a sheet band made of a thin metal sheet and a corrugated band made from another thin metal sheet, said sheet band and said corrugated band being superposed one over another so as to have areas of contact therebetween and so as to define many network-patterned gas flow passages along a central longitudinal axis thereof; and a metal casing having a central axis and being opened at opposite ends, said honeycomb core body being inserted in and fixed directly to said metal casing, said metal casing having an outer wall expandable and contractible axially so as to follow stress due to a thermal expansion of said honeycomb core body.
Claim 3
Dependent Claim
29 words
An exhaust gas cleaning apparatus according to claim 1, wherein said outer wall of said metal casing is a wavy form in longitudinal cross section and includes arcuate portions.
Claim 4
Dependent Claim
30 words
An exhaust gas cleaning apparatus according to claim 1, wherein said outer wall of said metal casing has a longitudinal cross-sectional shape of meanders including a succession of rough trapezoids.
Claim 5
Dependent Claim
27 words
An exhaust gas cleaning apparatus according to claim 1, wherein said sheet and corrugated bands of said honeycomb core body are rolled together into a spiral form.
Claim 6
Dependent Claim
24 words
An exhaust gas cleaning apparatus according to claim 1, wherein said sheet and corrugated bands of said honeycomb core body are laminated in layers.
Claim 7
Dependent Claim
18 words
An exhaust gas cleaning apparatus according to claim 1, wherein said metal casing has a circular cross section.
Claim 8
Dependent Claim
18 words
An exhaust gas cleaning apparatus according to claim 1, wherein said metal casing has a racing-track-shaped cross section.
Claim 9
Dependent Claim
35 words
An exhaust gas cleaning apparatus according to claim 1, wherein an outer peripheral surface of said honeycomb core body is fixed to an inner surface of said metal casing at at least one part axially.
Claim 10
Dependent Claim
35 words
An exhaust gas cleaning apparatus according to claim 2, wherein an outer peripheral surface of said honeycomb core body is fixed to an inner surface of said metal casing at at least one part axially.
Claim 11
Dependent Claim
35 words
An exhaust gas cleaning apparatus according to claim 3, wherein an outer peripheral surface of said honeycomb core body is fixed to an inner surface of said metal casing at at least one part axially.
Claim 12
Dependent Claim
42 words
An exhaust gas cleaning apparatus according to claim 8, wherein said outer peripheral surface of said honeycomb core body is fixed to said inner surface of said metal casing at at least one part axially and around said honeycomb core body circumferentially.
Claim 13
Dependent Claim
156 words
An exhaust gas cleaning apparatus comprising: at least two honeycomb core bodies each carrying thereon an exhaust gas cleaning catalyst and composed of a sheet band made of a thin metal sheet and a corrugated band made from another thin metal sheet, said sheet band and said corrugated band being superposed one over another so as to have areas of contact therebetween and so as to define many network-patterned gas flow passages along a central longitudinal axis thereof; and a metal casing having a central axis and being opened at opposite ends, said at least two honeycomb core bodies being arranged in said metal casing, with at least one axial space between said at least two honeycomb core bodies, and fixed directly to said metal casing, said metal casing having an outer wall expandable and contractible axially so as to follow stress due to a thermal expansion of said at least two individual honeycomb core bodies.
Claim 14
Dependent Claim
156 words
An exhaust gas cleaning apparatus comprising: at least two honeycomb core bodies each carrying thereon an exhaust gas cleaning catalyst and composed of a sheet band made of a thin metal sheet and a corrugated band made from another thin metal sheet, said sheet band and said corrugated band being superposed one over another so as to have areas of contact therebetween and so as to define many network-patterned gas flow passages along a central longitudinal axis thereof; and a metal casing having a central axis and being opened at opposite ends, said at least two honeycomb core bodies being arranged in said metal casing, with at least one axial space between said at least two honeycomb core bodies, and fixed directly to said metal casing, said metal casing having an outer wall expandable and contractible axially so as to follow stress due to a thermal expansion of said at least two individual honeycomb core bodies.
Claim 15
Dependent Claim
29 words
An exhaust gas cleaning apparatus according to claim 12, wherein said outer wall of said metal casing is a wavy form in longitudinal cross section and includes arcuate portions.
Claim 16
Dependent Claim
30 words
An exhaust gas cleaning apparatus according to claim 12, wherein said outer wall of said metal casing has a longitudinal cross-sectional shape of meanders including a succession of rough trapezoids.
Claim 17
Dependent Claim
32 words
An exhaust gas cleaning apparatus according to claim 12, wherein said sheet and corrugated bands of each of said at least two honeycomb core bodies are rolled together into a spiral form.
Claim 18
Dependent Claim
29 words
An exhaust gas cleaning apparatus according to claim 12, wherein said sheet and corrugated bands of each of said at least two honeycomb core bodies are laminated in layers.
Claim 19
Dependent Claim
18 words
An exhaust gas cleaning apparatus according to claim 12, wherein said metal casing has a circular cross section.
Claim 20
Dependent Claim
18 words
An exhaust gas cleaning apparatus according to claim 12, wherein said metal casing has a racing-track-shaped cross section.
Claim 21
Dependent Claim
40 words
An exhaust gas cleaning apparatus according to claim 12, wherein an outer peripheral surface of each of said at least two honeycomb core bodies is fixed to an inner surface of said metal casing at at least one part axially.
Claim 22
Dependent Claim
40 words
An exhaust gas cleaning apparatus according to claim 13, wherein an outer peripheral surface of each of said at least two honeycomb core bodies is fixed to an inner surface of said metal casing at at least one part axially.
Claim 23
Dependent Claim
40 words
An exhaust gas cleaning apparatus according to claim 14, wherein an outer peripheral surface of each of said at least two honeycomb core bodies is fixed to an inner surface of said metal casing at at least one part axially.
Claim 24
Dependent Claim
48 words
An exhaust gas cleaning apparatus according to claim 21, wherein an outer peripheral surface of each of said at least two honeycomb core bodies is fixed to an inner surface of said metal casing at at least one part axially and around each said honeycomb core body circumferentially.
References Cited (Backward Citations)
US4004887A
Cited
US3937617A
Cited
US4186172A
Cited
US4282186A
Cited
US4576800A
Cited
US4617176A
Cited
US4795615A
Cited
US4909994A
Cited
US4942020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-12 | 1998-03-14 | 1998-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-12 | 2002-03-14 | 2002-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-12 | 2006-03-14 | 2006-09-13 | $7700.00 | Window Closed / Lapsed |