US3756027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust emission control device for internal combustion engines
Assignee: Toyota Motor Corp
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Filing: 1971-06-04
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Granted: 1973-09-04
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Expires: 1991-06-04
Abstract
Abstract An exhaust emission control device comprising an inner core for causing unburned and nozious contained in exhaust gas from the internal combustion engine to undergo an oxidation reaction therein to convert to the innoxious gas, inlet tubes connected at one end thereof to said exhaust ports of the internal combustion engine and at the other end thereof to the cylindrical wall of the inner core tangentially with respect thereto so as to indroduce exhaust gas from the exhaust valve into the inner core, and exhaust gas outlet ports from inner core formed at opposite end walls concentrically in inner core and axially spaced apart from each other.
Inventors
- 👤 K Uchida
- 👤 K Gotoh
- 👤 M Yokota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:43
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
An exhaust emission control device for use with an internal combustion engine, comprising a housing, an inner core means disposed in said housing, inlet pipe means carrying exnaust gas from said internal combustion engine to said inner core means, said inner core means having a generally cylindrical configuration, said inlet pipe means being tangentially disposed relative to said inner core means, outlets on the longitudinal ends of said inner core means, said outlets being disposed at a radially central location spaced from the outer peripheral boundary of said inner core means, said inner core means being disposed in said housing to form an annular space between the outer surface of said inner core means and the inside of said housing, and exhaust means on said housing, whereby gas entering said inner core mEans through said tangentially disposed inlet pipe means undergoes an oxidation reaction in said inner core means in passing radially inwardly for exit through said outlets on said inner core means, said gas thereafter passing through said annular space and thence through said exhaust means in said housing.
Claim 2
Dependent Claim
180 words
An exhaust emission control device for use with an internal combustion engine, comprising a housing, an inner core means disposed in said housing, inlet pipe means carrying exnaust gas from said internal combustion engine to said inner core means, said inner core means having a generally cylindrical configuration, said inlet pipe means being tangentially disposed relative to said inner core means, outlets on the longitudinal ends of said inner core means, said outlets being disposed at a radially central location spaced from the outer peripheral boundary of said inner core means, said inner core means being disposed in said housing to form an annular space between the outer surface of said inner core means and the inside of said housing, and exhaust means on said housing, whereby gas entering said inner core mEans through said tangentially disposed inlet pipe means undergoes an oxidation reaction in said inner core means in passing radially inwardly for exit through said outlets on said inner core means, said gas thereafter passing through said annular space and thence through said exhaust means in said housing.
Claim 3
Dependent Claim
66 words
An exhaust emission control device according to claim 1, further comprising a tube coaxially disposed in said inner core means and extending between said two outlets, said tube having means defining a plurality of openings whereby exhaust gases having undergone an oxidation reaction in said inner core means pass from said inner core means through said openings in said tube and thence through said two outlets.
Claim 4
Dependent Claim
107 words
An exhaust emission control device according to claim 1 further comprising a tube coaxially disposed in said inner core means and connected to each of said outlets, each of said tubes having an outer diameter smaller than the inner diameter of said inner core means and having a longitudinal length less than one-half the longitudinal length of said inner core means, said pair of tubes receiving the gas in said inner core means which has undergone an oxidation reaction whereby such gas passes from said two tubes to the annular space between the outer surface of said inner core means and the inside surface of said housing.
Claim 5
Dependent Claim
48 words
An exhaust emission control device according to claim 1 wherein said inner core means comprises an inner core cylinder and a cylindrical radiation shield concentrically spaced about said inner cylinder, and spacer means disposed between said inner core cylinder and said radiation shield for maintaining said concentric spacing.
Claim 6
Dependent Claim
25 words
An exhaust emission control device according to claim 1 wherein said exhaust means is generally, centrally disposed relative to the longitudinal length of said housing.
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |