Patent US3814680A successfully refreshed from Google Patents.
Patent US3839862A successfully refreshed from Google Patents.
US3839862A
Expired / Lapsed
US
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Exhaust emission control device for an internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1972-10-02
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Granted: 1974-10-08
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Expires: 1992-10-02
Abstract
Abstract This invention relates to an exhause emission control device for an internal combustion engine. Said device comprises a primary reaction chamber comprising two chambers directly connected to inlet ports for introducing exhausts from the internal combustion engine into the primary reaction chamber and having exhaust outlet openings juxtaposed to each other, a secondary reaction chamber formed in the downstream zone of an exhaust passage including a space between said chambers and connected to an exhaust outlet port, and a heat insulating cylindrical body enclosing said reaction chambers.
Inventors
- 👤 K Gota
- 👤 N Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:47
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N13/102; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
An exhaust emission control device for an internal combustion engine comprising a heat insulating body encompassing two primary reaction chambers, a shield plate of funnel shape in cross section at one end of each of said chambers and within said body, said shield plates having their smaller ends mutually facing one another and spaced apart to define therebetween a secondary reaction chamber, means to introduce exhaust gases into said primary reaction chambers and means to withdraw exhaust gases from said secondary reaction chamber.
Claim 2
Dependent Claim
83 words
An exhaust emission control device for an internal combustion engine comprising a heat insulating body encompassing two primary reaction chambers, a shield plate of funnel shape in cross section at one end of each of said chambers and within said body, said shield plates having their smaller ends mutually facing one another and spaced apart to define therebetween a secondary reaction chamber, means to introduce exhaust gases into said primary reaction chambers and means to withdraw exhaust gases from said secondary reaction chamber.
References Cited (Backward Citations)
GB859428A
Cited
US3210161A
Cited
US3441381A
Cited
US3302394A
Cited
US3488723A
Cited
US3413803A
Cited
US3633368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |