US3274981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder heads for internal combustion engines
Assignee: Renault SA
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Filing: 1964-03-30
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Granted: 1966-09-27
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Peras Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:39
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4264; F02F1/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINES HAVING AT LEAST TWO IN-LINE CYLINDERS, SAID HEAD COMPRISING AN INLET AND EXHAUST VALVE SEAT ASSOCIATED WITH EACH CYLINDER, THE INLET SEATS OF ADJACENT CYLINDERS BEING POSITIONED ON EITHER SIDE OF THEIR CORRESPONDING OUTLET SEATS, A COMMON INLET PORT FOR THE INLET SEATS OF ADJACENT CYLINDERS, AN INLET PASSAGE CONNECTING SAID INLET PORT WITH ITS CORRESPONDING INLET SEATS, EACH OF SAID INLET PASSAGES BEING ROUTED SLIGHTLY OBLIQUELY WITH RESPECT TO A LINE PASSING THROUGH THE CENTRAL LONGITUDINAL AXES OF SAID CYLINDERS AND TERMINATING IN A VOLUTE WHICH LEADS UP TO SKIRTS THE CORRESPONDING INLET VALVE SEAT BEFORE PASSING INTO SAID CYLINDER, THE INNER VERTICAL WALL OF SAID INLET PASSAGE AT THE MOUTH OF SAID VOLUTE BEING SPACED AT LEAST AS GREAT A DISTANCE FROM THE CENTRAL LONGITUDINAL AXIS OF SAID INLET SEAT AS THE INNER ANNULAR WALL OF SAID INLET SEAT.
Claim 2
Dependent Claim
148 words
A CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINES HAVING AT LEAST TWO IN-LINE CYLINDERS, SAID HEAD COMPRISING AN INLET AND EXHAUST VALVE SEAT ASSOCIATED WITH EACH CYLINDER, THE INLET SEATS OF ADJACENT CYLINDERS BEING POSITIONED ON EITHER SIDE OF THEIR CORRESPONDING OUTLET SEATS, A COMMON INLET PORT FOR THE INLET SEATS OF ADJACENT CYLINDERS, AN INLET PASSAGE CONNECTING SAID INLET PORT WITH ITS CORRESPONDING INLET SEATS, EACH OF SAID INLET PASSAGES BEING ROUTED SLIGHTLY OBLIQUELY WITH RESPECT TO A LINE PASSING THROUGH THE CENTRAL LONGITUDINAL AXES OF SAID CYLINDERS AND TERMINATING IN A VOLUTE WHICH LEADS UP TO SKIRTS THE CORRESPONDING INLET VALVE SEAT BEFORE PASSING INTO SAID CYLINDER, THE INNER VERTICAL WALL OF SAID INLET PASSAGE AT THE MOUTH OF SAID VOLUTE BEING SPACED AT LEAST AS GREAT A DISTANCE FROM THE CENTRAL LONGITUDINAL AXIS OF SAID INLET SEAT AS THE INNER ANNULAR WALL OF SAID INLET SEAT.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |