US4294220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intake port means for extracting engine exhaust gas for recirculation
Assignee: Nissan Motor Co Ltd
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Filing: 1980-01-14
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Granted: 1981-10-13
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Expires: 2000-01-14
Abstract
Abstract An intake port means for extracting engine exhaust gas for recirculation having an extracting aperture placed in a stream of the engine exhaust gas and a cover having its closed end lying on the upstream side of said aperture while having its open end facing the downstream side from said aperture, so that the engine exhaust gas is extracted through trailing portion of the open end of the cover.
Inventors
- 👤 Seishi Yasuhara
- 👤 Eiichi Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:14
CPC Classifications
F; F02; F02M; F02M26/00; F02M26/13; F02M26/14; F02M26/15; F02B; F02B1/00; F02B1/02; F02B1/04; F02M26/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
An intake port means for extracting engine exhaust gas for recirculation in an internal combustion engine having an exhaust gas recirculation (EGR) system, comprising an intake port means formed of an EGR pipe and having an extracting aperture placed in a stream of the engine exhaust gas, and a cover having a closed end lying on the upstream side of said aperture while having an open end facing the downstream side of said aperture in such a manner that the engine exhaust gas is extracted through trailing portion of the open end of the cover.
Claim 2
Dependent Claim
95 words
An intake port means for extracting engine exhaust gas for recirculation in an internal combustion engine having an exhaust gas recirculation (EGR) system, comprising an intake port means formed of an EGR pipe and having an extracting aperture placed in a stream of the engine exhaust gas, and a cover having a closed end lying on the upstream side of said aperture while having an open end facing the downstream side of said aperture in such a manner that the engine exhaust gas is extracted through trailing portion of the open end of the cover.
Claim 3
Dependent Claim
25 words
An intake port means as set forth in claim 1, wherein said extracting aperture opens toward upstream of said stream of the engine exhaust gas.
Claim 4
Dependent Claim
25 words
An intake port means as set forth in claim 1, wherein said extracting aperture opens toward downstream of said stream of the engine exhaust gas.
Claim 5
Dependent Claim
27 words
An intake port means as set forth in claim 1, wherein said cover has a substantially cylindrical shape with one end closed and the opposite end open.
Claim 6
Dependent Claim
36 words
An intake port means as set forth in claim 1, wherein said closed end of said cover has a substantially cone shape with a pointed end facing upstream of said stream of the engine exhaust gas.
Claim 7
Dependent Claim
24 words
An intake port means as set forth in claim 1, wherein said extracting aperture is at an exhaust manifold of said internal combustion engine.
Claim 8
Dependent Claim
37 words
An intake port means as set forth in claim 1, wherein said extracting aperture is at just downstream of an exhaust manifold of said internal combustion engine, with respect to said stream of the engine exhaust gas.
Claim 9
Dependent Claim
36 words
An intake port means as set forth in claim 1, wherein said extracting aperture is at just downstream of a premuffler of said internal combustion engine, with respect to said stream of the engine exhaust gas.
Claim 10
Dependent Claim
37 words
An intake port means as set forth in claim 1, wherein said extracting aperture is at just downstream of a catalyzer means of said internal combustion engine, with respect to said stream of the engine exhaust gas.
Claim 11
Dependent Claim
37 words
An intake port means as set forth in claim 1, wherein said extracting aperture is at just downstream of a main muffler of said internal combustion engine, with respect to said stream of the engine exhaust gas.
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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |