Patent US3172397A successfully refreshed from Google Patents.
US3172397A
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US
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Cooling duct arrangement
Assignee: Linde GmbH
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Filing: 1962-06-07
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Granted: 1965-03-09
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Expires: 1982-06-07
Abstract
No abstract record available.
Inventors
- 👤 Schmuck Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:01
CPC Classifications
F; F01; F01P; F01P5/00; F01P5/02; F01P5/06; F02; F02F; F02F1/00; F02F1/02; F02F1/04; F02F1/06; F02F1/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A AIR-COOLED INTERNAL COMBUSTION ENGINE COMPRISING A SERIES OF CYLINDERS MOUNTED ON A CRANKCASE, CYLINDER HEADS ON SAID CYLINDERS, A CONDUIT ATTACHED TO THE CYLINDER HEAD FOR COMMUNICATION WITH THE COMBUSTION CHAMBERS, AND A COOLING AIR EXIT CONDUIT WHOSE UPPER WALL IS INTEGRAL WITH THE FIRST-MENTIONED CONDUITS, SAID EXIT CONDUIT BEING THE WIDE ENOUGH TO EXTEND ACROSS THE ENTIRE SERIES OF CYLINDERS AND CYLINDER HEADS AND OF SUFFICIENT DEPTH TO EXTEND VERTICALLY ACROSS THE CYLINDER AND CYLINDER HEADS.
Claim 2
Dependent Claim
78 words
A AIR-COOLED INTERNAL COMBUSTION ENGINE COMPRISING A SERIES OF CYLINDERS MOUNTED ON A CRANKCASE, CYLINDER HEADS ON SAID CYLINDERS, A CONDUIT ATTACHED TO THE CYLINDER HEAD FOR COMMUNICATION WITH THE COMBUSTION CHAMBERS, AND A COOLING AIR EXIT CONDUIT WHOSE UPPER WALL IS INTEGRAL WITH THE FIRST-MENTIONED CONDUITS, SAID EXIT CONDUIT BEING THE WIDE ENOUGH TO EXTEND ACROSS THE ENTIRE SERIES OF CYLINDERS AND CYLINDER HEADS AND OF SUFFICIENT DEPTH TO EXTEND VERTICALLY ACROSS THE CYLINDER AND CYLINDER HEADS.
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |