US3125083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preventing contamination of crank case oil
Assignee: —
•
Filing: —
•
Granted: 1964-03-17
•
Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:38
CPC Classifications
F; F01; F01M; F01M1/00; F01M1/10; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN COMBINATION WITH AN INTERNAL COMBUSTION ENGINE OF THE TYPE HAVING A CRANK CASE TO CONTAIN ITS LUBRICATING OIL AND PROVIDED WITH AN AIR INLET, A CHAMBER, MEANS CONNECTING SAID CHAMBER TO SAID ENGINE TO BE HEATED THEREBY AND INCLUDING A PARTITION DIVIDING IT INTO UPPER AND LOWER COMPARTMENTS AND HAVING A PORT EFFECTING COMMUNICATION THEREBETWEEN, SAID UPPER COMPARTMENT HAVING A PORT FOR CONNECTION TO THE AIR INTAKE OF SAID ENGINE, SAID LOWER COMPARTMENT HAVING A PORT FOR CONNECTION WITH THE INTERIOR OF THE ENGINE IN A ZONE ABOVE THE OIL LEVEL IN THE CRANK CASE, A DRAIN FOR SAID LOWER COMPARTMENT, AND A VALVE MOUNTED IN SAID UPPER COMPARTMENT AND NORMALLY CLOSING SAID PORT BUT OPENED IN RESPONSE TO INTAKE SUCTION.
Claim 2
Dependent Claim
122 words
IN COMBINATION WITH AN INTERNAL COMBUSTION ENGINE OF THE TYPE HAVING A CRANK CASE TO CONTAIN ITS LUBRICATING OIL AND PROVIDED WITH AN AIR INLET, A CHAMBER, MEANS CONNECTING SAID CHAMBER TO SAID ENGINE TO BE HEATED THEREBY AND INCLUDING A PARTITION DIVIDING IT INTO UPPER AND LOWER COMPARTMENTS AND HAVING A PORT EFFECTING COMMUNICATION THEREBETWEEN, SAID UPPER COMPARTMENT HAVING A PORT FOR CONNECTION TO THE AIR INTAKE OF SAID ENGINE, SAID LOWER COMPARTMENT HAVING A PORT FOR CONNECTION WITH THE INTERIOR OF THE ENGINE IN A ZONE ABOVE THE OIL LEVEL IN THE CRANK CASE, A DRAIN FOR SAID LOWER COMPARTMENT, AND A VALVE MOUNTED IN SAID UPPER COMPARTMENT AND NORMALLY CLOSING SAID PORT BUT OPENED IN RESPONSE TO INTAKE SUCTION.
References Cited (Backward Citations)
NL11352C
Cited
US1524540A
Cited
US1000719A
Cited
US2274132A
Cited
US2386765A
Cited
US2686504A
Cited
US2765259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-17 | 1967-09-16 | 1968-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-17 | 1971-09-16 | 1972-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-17 | 1975-09-16 | 1976-03-17 | $7700.00 | Window Closed / Lapsed |