Patent US3260253A successfully refreshed from Google Patents.
US3260253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankcase explosion shutdown unit
Assignee: Individual
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Filing: 1964-08-31
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Granted: 1966-07-12
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Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Desaulniers George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:56
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08; F02B77/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A CRANKCASE EXPLOSION SHUTDOWN UNIT FOR TWO AND FOUR STROKE ENGINES WHICH INCLUDES AN ENGINE SHUTDOWN SYSTEM; COMPRISING IN COMBINATION PRESSURE RESPONSIVE RECIPROCABLE MEANS SECURED TO THE WALL OF SAID CRANKCASE AND EXTENDING MOVABLY THERETHROUGH, A HOLLOW COVER SECURED EXTERNALLY TO SAID CRANKCASE AND ENCLOSING SAID RECIPROCABLE MEANS, SPRING MEANS REACTING BETWEEN SAID RECIPROCABLE MEANS AND SAID HOLLOW COVER NORMALLY BIASSING SAID RECIPROCABLE MEANS INWARDLY OF SAID CRANKCASE AGAINST NORMAL OPERATING CRANKCASE PRESSURES, AND MEANS MOUNTED ON SAID COVER OPERATIVELY CONNECTED TO SAID ENGING SHUTDOWN SYSTEM, SAID LAST MENTIONED MEANS EXTENDING INTO SAID COVER, SAID LAST MENTIONED MEANS BEING OPERABLE BY SAID PRESSURE RESPONSIVE RECIPROCABLE MEANS WHEN EXPLOSIVE PRESSURE OCCURS IN SAID CRANKCASE.
Claim 2
Dependent Claim
113 words
A CRANKCASE EXPLOSION SHUTDOWN UNIT FOR TWO AND FOUR STROKE ENGINES WHICH INCLUDES AN ENGINE SHUTDOWN SYSTEM; COMPRISING IN COMBINATION PRESSURE RESPONSIVE RECIPROCABLE MEANS SECURED TO THE WALL OF SAID CRANKCASE AND EXTENDING MOVABLY THERETHROUGH, A HOLLOW COVER SECURED EXTERNALLY TO SAID CRANKCASE AND ENCLOSING SAID RECIPROCABLE MEANS, SPRING MEANS REACTING BETWEEN SAID RECIPROCABLE MEANS AND SAID HOLLOW COVER NORMALLY BIASSING SAID RECIPROCABLE MEANS INWARDLY OF SAID CRANKCASE AGAINST NORMAL OPERATING CRANKCASE PRESSURES, AND MEANS MOUNTED ON SAID COVER OPERATIVELY CONNECTED TO SAID ENGING SHUTDOWN SYSTEM, SAID LAST MENTIONED MEANS EXTENDING INTO SAID COVER, SAID LAST MENTIONED MEANS BEING OPERABLE BY SAID PRESSURE RESPONSIVE RECIPROCABLE MEANS WHEN EXPLOSIVE PRESSURE OCCURS IN SAID CRANKCASE.
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) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |