Patent US3881316A successfully refreshed from Google Patents.
US3881316A
Expired / Lapsed
US
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Exhaust gas purifying device for an internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1973-05-14
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Granted: 1975-05-06
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Expires: 1993-05-14
Abstract
Abstract An exhaust gas purifying device for an internal combustion engine comprising a converter body connected to an exhaust passage, and major diameter cylindrical member and a minor diameter cylindrical member made of an air permeable material and concentrically arranged in said converter body. Said device further comprises ducts for directly introducing exhaust gases into a bore of said minor diameter cylindrical member from an internal combustion engine or from an exhaust manifold thereof, and a catalyst filled in a space defined by walls of said two cylindrical members for effecting exhaust gas purification.
Inventors
- 👤 Tsuchio Bunda
- 👤 Itaru Niimi
- 👤 Yasuhisa Kaneko
- 👤 Fumiyoshi Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:05
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2882; F01N3/18; F01N3/20; F01N3/2006; F01N3/22; F01N3/2839; F01N3/2846; F01N13/00; F01N13/08; F01N13/10; F01N2260/00; F01N2260/08; F01N2330/00; F01N2330/08; F01N2470/00; F01N2470/16; F01N2470/18; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
An exhaust gas purifying device for an internal combustion engine, comprising: a converter body connected to an exhaust outlet passage, a major diameter cylindrical member and a minor diameter cylindrical member comprising an air permeable material, concentrically arranged within said converter body, a duct for directly introducing exhaust gases into the bore of said minor diameter cylindrical member from an internal combustion engine, a catalyst material for effecting exhaust gas purification located in the space between the walls of said major and minor diameter cylindrical members, substantially horizontal partition plates located in the space between the walls of said major and minor diameter cylindrical members, dividing the catalyst material into an upper catalyst portion and a lower catalyst portion, for preventing the weight of the upper catalyst portion from bearing upon the lower catalyst portion, and the portions of the major diameter cylindrical member immediately belOw said partition plates, are non-permeable to exhaust gases.
Claim 2
Dependent Claim
154 words
An exhaust gas purifying device for an internal combustion engine, comprising: a converter body connected to an exhaust outlet passage, a major diameter cylindrical member and a minor diameter cylindrical member comprising an air permeable material, concentrically arranged within said converter body, a duct for directly introducing exhaust gases into the bore of said minor diameter cylindrical member from an internal combustion engine, a catalyst material for effecting exhaust gas purification located in the space between the walls of said major and minor diameter cylindrical members, substantially horizontal partition plates located in the space between the walls of said major and minor diameter cylindrical members, dividing the catalyst material into an upper catalyst portion and a lower catalyst portion, for preventing the weight of the upper catalyst portion from bearing upon the lower catalyst portion, and the portions of the major diameter cylindrical member immediately belOw said partition plates, are non-permeable to exhaust gases.
Claim 3
Dependent Claim
27 words
The exhaust gas purifying device of claim 1, having a plurality of ducts for directly introducing exhaust gases into the bore of said minor diameter cylindrical member.
Claim 4
Dependent Claim
31 words
The exhaust gas purifying device of claim 2 wherein a portion of the wall of at least the upper portion of the major diameter cylindrical member is non-permeable to exhaust gases.
Claim 5
Dependent Claim
17 words
The exhaust gas purifying device as defined in claim 2, wherein the cylindrical members are ceramic material.
Claim 6
Dependent Claim
24 words
The exhaust gas purifying device as defined in claim 4, wherein the cylindrical members have a multitude of small openings in the walls thereof.
Claim 7
Dependent Claim
27 words
The exhaust gas purifying device as defined in claim 2, wherein the cylindrical members are metal, and have a multitude of small openings in the walls thereof.
Claim 8
Dependent Claim
24 words
The exhaust gas purifying device as defined in claim 5, wherein the diameters of said openings are from about 1 to about 5 mm.
Claim 9
Dependent Claim
24 words
The exhaust gas purifying device as defined in claim 6, wherein the diameters of said openings are from about 1 to about 5 mm.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |