US5065576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas purifying device for a diesel engine
Assignee: Toyota Industries Corp
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Filing: 1990-02-06
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Granted: 1991-11-19
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Expires: 2010-02-06
Abstract
Abstract An exhaust gas purifying device for a diesel engine comprising an outer casing accommodating a catalyst-carrying honeycomb having a dustfree structure, and a baffle plate arranged in the outer casing of the device between an gas inlet of the case and the catalyst-carrying honeycomb. The honeycomb structure has open cells having a size equal to or less than 100 cells per square inch, to allow particles to pass therethrough. The baffle plate directs the exhaust gas over surface of the catalyst-carrying honeycomb, with a uniform distribution thereof.
Inventors
- 👤 Hirotaka Kanazawa
- 👤 Yoshitomi Fujimoto
- 👤 Michio Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:39
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2853; F01N3/2857; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8668; F01N13/00; F01N13/009; F01N13/0097; F01N3/02; F01N3/021; F01N3/0211; F01N3/022; F01N3/0222; F01N3/023; F01N3/2803; F01N3/2825; F01N3/2828; F01N3/2882; F01N3/2892; F01N2240/00; F01N2240/20; F01N2250/00; F01N2250/02; F01N2260/00; F01N2260/04; F01N2330/00; F01N2330/06; F01N2350/00; F01N2350/02; F01N2350/04; F01N2350/06; F01N2370/00; F01N2370/02; F01N2370/04; F01N2450/00; F01N2450/30; F01N2570/00; F01N2570/20; F02; F02B; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
An exhaust gas purifying device for a diesel engine having an exhaust pipe connected therefrom, said device comprising an outer casing comprising a cylindrical member, a first end cap closing one end of said cylindrical member and having a gas inlet formed therethrough adapted for connection to said exhaust pipe, and a second end cap closing the other end of said cylindrical member and having a gas outlet formed therethrough, a catalyst-carrying honeycomb having a dust free structure and arranged in said outer casing, and a baffle plate means arranged in said outer casing between said gas inlet and said catalyst-carrying honeycomb and attached to said first end cap, wherein at least one of said end caps is detachable from said cylindrical member and said catalyst-carrying honeycomb is removable from said outer casing after said end cap is detached.
Claim 2
Dependent Claim
139 words
An exhaust gas purifying device for a diesel engine having an exhaust pipe connected therefrom, said device comprising an outer casing comprising a cylindrical member, a first end cap closing one end of said cylindrical member and having a gas inlet formed therethrough adapted for connection to said exhaust pipe, and a second end cap closing the other end of said cylindrical member and having a gas outlet formed therethrough, a catalyst-carrying honeycomb having a dust free structure and arranged in said outer casing, and a baffle plate means arranged in said outer casing between said gas inlet and said catalyst-carrying honeycomb and attached to said first end cap, wherein at least one of said end caps is detachable from said cylindrical member and said catalyst-carrying honeycomb is removable from said outer casing after said end cap is detached.
Claim 3
Dependent Claim
33 words
An exhaust gas purifying device according to claim 1, wherein said catalyst-carrying honeycomb comprises a honeycomb structure having open cells having a size equal to or less than 100 cells per square inch.
Claim 4
Dependent Claim
56 words
An exhaust gas purifying device according to claim 1, wherein said baffle plate means comprises a flat baffle plate having apertures formed therethrough and attached to said first end cap by an annular mounting member, in alignment with said catalyst-carrying honeycomb, said flat baffle plate having a cross-sectional area smaller than that of said catalyst-carrying honeycomb.
Claim 5
Dependent Claim
30 words
An exhaust gas purifying device according to claim 1, wherein a second baffle plate means is attached to said second end cap by leg members and faces said catalyst-carrying honeycomb.
Claim 6
Dependent Claim
35 words
An exhaust gas purifying device according to claim 1, wherein a plurality of catalyst-carrying honeycombs are fitted in the outer casing in an axial spaced relationship, each of said catalyst-carrying honeycombs having a dustfree structure.
Claim 7
Dependent Claim
35 words
An exhaust gas purifying device according to claim 5, wherein two catalyst-carrying honeycombs are provided, and the number of the cells of the upstream catalyst-carrying honeycomb is greater than that of the downstream catalyst-carrying honeycomb.
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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) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |