US3857458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas outlet means for an internal combustion engine
Assignee: Mazda Motor Corp
•
Filing: 1973-09-06
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Granted: 1974-12-31
•
Expires: 1993-09-06
Abstract
Abstract Exhaust gas outlet means for an internal combustion engine comprising an exhaust pipe having an outlet end of a flattened cross-sectional configuration with a width smaller than diameter of unflattened portion and an open-ended fresh air suction pipe disposed with a clearance with the exhaust pipe and having a portion of reduced cross-sectional area around the outlet end of the exhaust pipe so as to define a suction throat in the vicinity of said outlet end.
Inventors
- 👤 T Ohtani
- 👤 T Sato
- 👤 F Sumitomo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:52
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/082; F01N1/00; F01N1/14; F01N3/00; F01N3/02; F01N3/05; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
Exhaust gas outlet means for an internal combustion engine, the outlet means comprising: an elongated exhaust pipe having a predetermined diameter through a portion of its length, and an outlet end whose cross-sectional configuration is gradually flattened in a first plane into a converging nozzle, and whose cross-sectional configuration is V-shaped in a second plane transverse to said first plane to define a diverging nozzle, the cross-sectional area of said outlet end being at least equal to that of the exhaust pipe in the said portion of its length having a predetermined diameter, and an open-ended fresh air suction pipe disposed around and with a clearance from the exhaust pipe and having a portion of reduced cross-sectional area around the outlet end of the exhaust pipe so as to define a suction throat at said outlet end.
Claim 2
Dependent Claim
137 words
Exhaust gas outlet means for an internal combustion engine, the outlet means comprising: an elongated exhaust pipe having a predetermined diameter through a portion of its length, and an outlet end whose cross-sectional configuration is gradually flattened in a first plane into a converging nozzle, and whose cross-sectional configuration is V-shaped in a second plane transverse to said first plane to define a diverging nozzle, the cross-sectional area of said outlet end being at least equal to that of the exhaust pipe in the said portion of its length having a predetermined diameter, and an open-ended fresh air suction pipe disposed around and with a clearance from the exhaust pipe and having a portion of reduced cross-sectional area around the outlet end of the exhaust pipe so as to define a suction throat at said outlet end.
Claim 3
Dependent Claim
25 words
Exhaust gas outlet means in accordance with claim 1 which said suction pipe has a flattened cross-sectional configuration at said portion of reduced cross-sectional area.
Claim 4
Dependent Claim
26 words
Exhaust gas outlet means in accordance with claim 1 which said portion of reduced cross-sectional area is formed at the intermediate portion of the suction pipe.
Claim 5
Dependent Claim
33 words
Exhaust gas outlet means in accordance with claim 1 in which said exhaust pipe is provided with a silencer and said suction pipe is extended to encircle said silencer with a clearance thereto.
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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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |