US3270684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston machine
Assignee: Individual
•
Filing: 1963-12-03
•
Granted: 1966-09-06
•
Expires: 1983-12-03
Abstract
No abstract record available.
Inventors
- 👤 Pasquali Jean
- 👤 Prauthois Yvon
- 👤 Dordain Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:34
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/14; F04B43/00; F04B43/0009; F04B43/0036; F04B9/02; F04B9/04; F04B9/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PISTON MACHINE COMPRISING A CYLINDER PROVIDED WITH A BOTTOM HAVING SUCTION AND DELIVERY ORIFICES, A PISTION SLIDABLY MOUNTED IN SAID CYLINDER, AND A PAD OF ELASTIC MATERIAL OF RELATIVELY GREAT THICKNESS IN WHICH A FRUSTOCONICAL CAVITY HAVING ITS LARGE END OPENING TOWARD SAID BOTTOM IS FORMED, SAID PAD BEING SLIDABLY FITTED IN SAID CYLINDER BETWEEN SAID PISTON AND SAID BOTTOM, WHEREIN SAID CAVITY IS ALSO OPEN AT ITS SMALL END ADJACENT TO SAID PISTON AND SLIGHTLY ROUNDED EDGES ARE PROVIDED BETWEEN THE FRUSTOCONICAL SURFACE OF SAID CAVITY AND THE END FACES OF SAID PAD.
Claim 2
Dependent Claim
95 words
A PISTON MACHINE COMPRISING A CYLINDER PROVIDED WITH A BOTTOM HAVING SUCTION AND DELIVERY ORIFICES, A PISTION SLIDABLY MOUNTED IN SAID CYLINDER, AND A PAD OF ELASTIC MATERIAL OF RELATIVELY GREAT THICKNESS IN WHICH A FRUSTOCONICAL CAVITY HAVING ITS LARGE END OPENING TOWARD SAID BOTTOM IS FORMED, SAID PAD BEING SLIDABLY FITTED IN SAID CYLINDER BETWEEN SAID PISTON AND SAID BOTTOM, WHEREIN SAID CAVITY IS ALSO OPEN AT ITS SMALL END ADJACENT TO SAID PISTON AND SLIGHTLY ROUNDED EDGES ARE PROVIDED BETWEEN THE FRUSTOCONICAL SURFACE OF SAID CAVITY AND THE END FACES OF SAID PAD.
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |