US3131942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-tight devices for rotating shafts
Assignee: Alsacienne de Constructions Mecaniques SA
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Filing: 1959-07-13
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Granted: 1964-05-05
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Expires: 1979-07-13
Abstract
No abstract record available.
Inventors
- 👤 Ertaud Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:55
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A DEVICE FOR ENSURING FLUID-TIGHTNESS BETWEEN TWO CHAMBERS CONTAINING MIGRATORY GASEOUS MEDIA, WHEREIN THE CHAMBERS ARE SEPARATED BY A WALL TRAVERSED BY A ROTATING SHAFT: A STATOR MEMBER FORMING A SLEEVE AROUND SAID ROTATING SHAFT WITH A SMALL CLEARANCE BETWEEN THE STATOR AND THE SHAFT; SAID SLEEVE BEING IMPERFORATE BETWEEN ITS ENDS; TWO HELICOIDAL GROOVES HAVING OPPOSITE DIRECTIONS OF THREAD FORMED IN THE INTERNAL SURFACE OF SAID SLEEVE, AND PROGRESSING RESPECTIVELY TOWARDS THE TWO EXTREMITIES OF SAID SLEEVE IN THE DIRECTION OF ROTATION OF SAID SHAFT,
Claim 2
Dependent Claim
87 words
IN A DEVICE FOR ENSURING FLUID-TIGHTNESS BETWEEN TWO CHAMBERS CONTAINING MIGRATORY GASEOUS MEDIA, WHEREIN THE CHAMBERS ARE SEPARATED BY A WALL TRAVERSED BY A ROTATING SHAFT: A STATOR MEMBER FORMING A SLEEVE AROUND SAID ROTATING SHAFT WITH A SMALL CLEARANCE BETWEEN THE STATOR AND THE SHAFT; SAID SLEEVE BEING IMPERFORATE BETWEEN ITS ENDS; TWO HELICOIDAL GROOVES HAVING OPPOSITE DIRECTIONS OF THREAD FORMED IN THE INTERNAL SURFACE OF SAID SLEEVE, AND PROGRESSING RESPECTIVELY TOWARDS THE TWO EXTREMITIES OF SAID SLEEVE IN THE DIRECTION OF ROTATION OF SAID SHAFT,
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |