US3139870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engines with four valves
Assignee: Individual
•
Filing: 1962-01-03
•
Granted: 1964-07-07
•
Expires: 1982-01-03
Abstract
No abstract record available.
Inventors
- 👤 Sampietro Achille Carlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:10
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F01; F01L; F01L1/00; F01L1/26; F01L1/262; F02B; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/20; F02B2275/34; F02B3/00; F02B3/06; F02F2001/244; F02F2001/247; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
AN INTERNAL COMBUSTION ENGINE HAVING A CYLINDER HEAD WITH AT LEAST ONE COMBUSTION CHAMBER, TWO INLET PORTS OPENING INTO SAID CHAMBER ON ONE SIDE OF A CENTRAL LONGITUDINAL PLANE THROUGH THE CHAMBER, AND TWO EXHAUST PORTS OPENING INTO SAID CHAMBER ON THE OPPOSITE SIDE OF SAID PLANE, SPRING-LOADED INLET AND EXHAUST POPPET VALVES CONTROLLING FLOW OF GAS THROUGH SAID INLET AND EXHAUST PORTS RESPECTIVELY, A SINGLE CAMSHAFT EXTENDING ABOVE SAID CYLINDER HEAD PARALLEL TO SAID LONGITUDINAL PLANE, TWO CAMS PROVIDED ON SAID CAMSHAFT TO OPERATE SAID INLET VALVES AND SAID EXHAUST VALVES, MEANS INTERPOSED BETWEEN EACH OF SAID CAMS AND A CORRESPONDING INLET VALVE, SAID MEANS CONSISTING OF A SEPARATE UNITARY RIGID ROCKER, MEANS INTERPOSED BETWEEN EACH CAM AND A CORRESPONDING EXHAUST VALVE, SAID MEANS CONSISTING OF A SEPARATE UNITARY, RIGID ROCKER, WHEREBY UPON TIMED ROTATION OF SAID CAM SHAFT, EACH OF SAID CAMS OPERATES IN SEQUENCE, RESPECTIVE ONES OF SAID INLET AND EXHAUST VALVES.
Claim 2
Dependent Claim
155 words
AN INTERNAL COMBUSTION ENGINE HAVING A CYLINDER HEAD WITH AT LEAST ONE COMBUSTION CHAMBER, TWO INLET PORTS OPENING INTO SAID CHAMBER ON ONE SIDE OF A CENTRAL LONGITUDINAL PLANE THROUGH THE CHAMBER, AND TWO EXHAUST PORTS OPENING INTO SAID CHAMBER ON THE OPPOSITE SIDE OF SAID PLANE, SPRING-LOADED INLET AND EXHAUST POPPET VALVES CONTROLLING FLOW OF GAS THROUGH SAID INLET AND EXHAUST PORTS RESPECTIVELY, A SINGLE CAMSHAFT EXTENDING ABOVE SAID CYLINDER HEAD PARALLEL TO SAID LONGITUDINAL PLANE, TWO CAMS PROVIDED ON SAID CAMSHAFT TO OPERATE SAID INLET VALVES AND SAID EXHAUST VALVES, MEANS INTERPOSED BETWEEN EACH OF SAID CAMS AND A CORRESPONDING INLET VALVE, SAID MEANS CONSISTING OF A SEPARATE UNITARY RIGID ROCKER, MEANS INTERPOSED BETWEEN EACH CAM AND A CORRESPONDING EXHAUST VALVE, SAID MEANS CONSISTING OF A SEPARATE UNITARY, RIGID ROCKER, WHEREBY UPON TIMED ROTATION OF SAID CAM SHAFT, EACH OF SAID CAMS OPERATES IN SEQUENCE, RESPECTIVE ONES OF SAID INLET AND EXHAUST VALVES.
References Cited (Backward Citations)
AT85857B
Cited
US1609149A
Cited
FR681827A
Cited
US2054928A
Cited
GB431098A
Cited
GB456688A
Cited
GB674180A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |