US3205789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder unit
Assignee: Individual
•
Filing: 1964-05-05
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Granted: 1965-09-14
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Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Melvin A Mandelko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:55
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/04; F15B21/047; F16; F16F; F16F9/00; F16F9/32; F16F9/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A CYLINDER, A HOLLOW MEMBER HAVING A WALL INTERMEDIATE ITS ENDS, SAID WALL AND SAID ENDS OF SAID HOLLOW MEMBER DEFINING A PAIR OF CHAMBERS, A PISTON AND SHAFT DISPOSED IN ONE OF SAID CHAMBERS, SAID SHAFT EXTENDING OUTWARDLY OF SAID CYLINDER, SAID PISTON ADAPTED TO MOVE BETWEEN SAID WALL AND THE END OF SAID ONE CHAMBER, A THIRD CHAMBER BEING DEFINED BY SAID PISTON AND THE END OF SAID ONE CHAMBER, A PRESSURE SOURCE IN COMMUNICATION WITH SAID THIRD CHAMBER, SAID WALL HAVING A FIRST PORT-EXTENDING THERETHROUGH, A THROTTLE CHAMBER BEING IN COMMUNICATION WITH SAID FIRST PORT AND DISPOSED IN THE OTHER CHAMBER OF SAID PAIR OF CHAMBERS, A BAFFLE MEMBER POSITIONED IN SAID THROTTLE CHAMBER, A RETURN PORT IN SAID WALL, AND A VALVE ASSOCIATED WITH SAID RETURN PORT AND HAVING MEANS FOR MAINTAINING IT IN A NORMALLY CLOSED POSITION.
Claim 2
Dependent Claim
143 words
IN A CYLINDER, A HOLLOW MEMBER HAVING A WALL INTERMEDIATE ITS ENDS, SAID WALL AND SAID ENDS OF SAID HOLLOW MEMBER DEFINING A PAIR OF CHAMBERS, A PISTON AND SHAFT DISPOSED IN ONE OF SAID CHAMBERS, SAID SHAFT EXTENDING OUTWARDLY OF SAID CYLINDER, SAID PISTON ADAPTED TO MOVE BETWEEN SAID WALL AND THE END OF SAID ONE CHAMBER, A THIRD CHAMBER BEING DEFINED BY SAID PISTON AND THE END OF SAID ONE CHAMBER, A PRESSURE SOURCE IN COMMUNICATION WITH SAID THIRD CHAMBER, SAID WALL HAVING A FIRST PORT-EXTENDING THERETHROUGH, A THROTTLE CHAMBER BEING IN COMMUNICATION WITH SAID FIRST PORT AND DISPOSED IN THE OTHER CHAMBER OF SAID PAIR OF CHAMBERS, A BAFFLE MEMBER POSITIONED IN SAID THROTTLE CHAMBER, A RETURN PORT IN SAID WALL, AND A VALVE ASSOCIATED WITH SAID RETURN PORT AND HAVING MEANS FOR MAINTAINING IT IN A NORMALLY CLOSED POSITION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |