Patent US3077871A successfully refreshed from Google Patents.
US3077871A
Expired / Lapsed
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Crankcase ventilating system for internal combustion engines
Assignee: Richfield Oil Corp
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Filing: 1962-03-19
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Granted: 1963-02-19
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Harold D Daigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:19
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A CRANKCASE VENTILATING SYSTEM FOR INTERNAL COMBUSTION ENGINES HAVING AN OPENING IN THE ENGINE ABOVE THE OIL LEVEL THROUGH WHICH BLOWBY FLUIDS CAN ESCAPE THE ENGINE AND CONDUIT MEANS PROVIDING FLUID COMMUNICATION BETWEEN SAID OPENING AND THE INDUCTION SYSTEM OF PRESSURE, THE IMPROVEMENT COMPRISING VALVE MEANS POSITIONED IN SAID CONDUIT MEANS SAID VALVE MEANS BEING NORMALLY CLOSED IN RESPONSE TO MANIFOLD VACUUM AND ADAPTED TO OPEN IN RESPONSE TO PRESSURE BUILDUP IN SAID CRANKCASE TO PASS BLOWBY FLUIDS THROUGH SAID CONDUIT MEANS INTO SAID INDUCTION SYSTEM.
Claim 2
Dependent Claim
87 words
IN A CRANKCASE VENTILATING SYSTEM FOR INTERNAL COMBUSTION ENGINES HAVING AN OPENING IN THE ENGINE ABOVE THE OIL LEVEL THROUGH WHICH BLOWBY FLUIDS CAN ESCAPE THE ENGINE AND CONDUIT MEANS PROVIDING FLUID COMMUNICATION BETWEEN SAID OPENING AND THE INDUCTION SYSTEM OF PRESSURE, THE IMPROVEMENT COMPRISING VALVE MEANS POSITIONED IN SAID CONDUIT MEANS SAID VALVE MEANS BEING NORMALLY CLOSED IN RESPONSE TO MANIFOLD VACUUM AND ADAPTED TO OPEN IN RESPONSE TO PRESSURE BUILDUP IN SAID CRANKCASE TO PASS BLOWBY FLUIDS THROUGH SAID CONDUIT MEANS INTO SAID INDUCTION SYSTEM.
References Cited (Backward Citations)
US1421567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |