US3157169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum control for crankcase ventilation
Assignee: Individual
•
Filing: 1962-02-19
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Granted: 1964-11-17
•
Expires: 1982-02-19
Abstract
No abstract record available.
Inventors
- 👤 Drysdale Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:56
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F16; F16N; F16N2250/00; F16N2250/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN COMBINATION WITH AN INTERNAL COMBUSTION ENGINE HAVING A CRANKCASE THROUGH WHICH FUMES AND OIL VAPORS CIRCULATE, A VENTILATING SYSTEM FOR THE CRANKCASE TO EFFECT CHANNELING OF THE FUMES AND OIL VAPORS INTO THE COMBUSTION CHAMBERS OF THE ENGINE COMPRISING A PASSAGEWAY INCLUDING A CONDUIT CONNECTED BETWEEN THE INTERIOR OF THE CRANKCASE AND THE COMBUSTION CHAMBERS OF THE ENGINE, MEANS INTERPOSED IN SAID PASSAGEWAY TO DRAW FUMES AND OIL VAPORS FROM THE CRANKCASE AND IMPEL THEM INTO THE COMBUSTION CHAMBERS, AND CONTROL MEANS OPERATIVELY ASSOCIATED WITH THE CRANKCASE AND SAID IMPELLING MEANS IN-
Claim 2
Dependent Claim
93 words
IN COMBINATION WITH AN INTERNAL COMBUSTION ENGINE HAVING A CRANKCASE THROUGH WHICH FUMES AND OIL VAPORS CIRCULATE, A VENTILATING SYSTEM FOR THE CRANKCASE TO EFFECT CHANNELING OF THE FUMES AND OIL VAPORS INTO THE COMBUSTION CHAMBERS OF THE ENGINE COMPRISING A PASSAGEWAY INCLUDING A CONDUIT CONNECTED BETWEEN THE INTERIOR OF THE CRANKCASE AND THE COMBUSTION CHAMBERS OF THE ENGINE, MEANS INTERPOSED IN SAID PASSAGEWAY TO DRAW FUMES AND OIL VAPORS FROM THE CRANKCASE AND IMPEL THEM INTO THE COMBUSTION CHAMBERS, AND CONTROL MEANS OPERATIVELY ASSOCIATED WITH THE CRANKCASE AND SAID IMPELLING MEANS IN-
References Cited (Backward Citations)
US2271150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |