US3234923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and braking system for internal combustion engines
Assignee: Caterpillar Inc
•
Filing: 1962-06-18
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Granted: 1966-02-15
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Expires: 1982-06-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneth J Fleck
- 👤 John M Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:02
CPC Classifications
F; F02; F02D; F02D9/00; F02D9/04; F02D9/06; F01; F01L; F01L13/00; F01L13/06; F02D13/00; F02D13/02; F02D13/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A BRAKING SYSTEM IN COMBINATION WITH AN INTERNAL COMBUSTION ENGINE HAVING AN INTAKE MANIFOLD, AN EXHAUST MANIFOLD, AND FIRST AND SECOND VALVE CAM SHAFTS MOUNTED FOR ROTATION THEREIN, SAID SYSTEM COMPRISING VALVE MEANS FOR SELECTIVELY FORMING SAID MANIFOLDS INTO CLOSED CHAMBERS AND MEANS FOR SELECTIVELY ROTATING SAID FIRST CAM SHAFT A PREDETERMINED AMOUNT RELATIVELY TO SAID FIRST CAM SHAFT WHEREBY BRAKING EFFICIENTLY OF THE ENGINE MAY BE INCREASED.
References Cited (Backward Citations)
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US1331787A
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US1358187A
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US1679367A
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US2685281A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |