Patent US1917970A successfully refreshed from Google Patents.
US3150822A
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Sealing and centering device for rotary shaft
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1962-02-06
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Granted: 1964-09-29
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Expires: 1982-02-06
Abstract
No abstract record available.
Inventors
- 👤 Dreyfus Gaspard Paul
- 👤 Ertaud Andre
- 👤 Friberg Jean
- 👤 Galley Robert
- 👤 Julia Roger
- 👤 Panossian Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
F; F04; F04D; F04D19/00; F04D19/02; F04D19/04; F04D19/044; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A SEALING AND CENTERING DEVICE FOR A ROTATABLE SHAFT, A ROTATABLE SHAFT, A FIRST HIGH PRESSURE SPACE, A SECOND LOWER PRESSURE SPACE, A FIXED WALL SEPARATING SAID FIRST HIGHER PRESSURE SPACE AND SAID SECOND LOWER PRESSURE SPACE, FIRST AND SECOND PORTIONS OF SAID SHAFT DISPOSED IN THAT ORDER FROM SAID FIRST TO SAID SECOND SPACE, FIRST AND SECOND SLEEVES IN SAID WALL CONFRONTING SAID FIRST AND SECOND PORTIONS, RESPECTIVELY, MEANS FOR ESTABLISHING A PRESSURE CLOSE TO SAID LOWER PRESSURE BETWEEN SAID FIRST AND SECOND SLEEVES, AND HELICAL GROOVE MEANS FORMED IN ONE AT LEAST OF SAID SECOND PORTION AND SLEEVE, SAID FIRST PORTION AND SLEEVE BEING SMOOTH AND SEPARATED BY A CLEARANCE, AND SAID SECOND PORTION AND SLEEVE BEING SEPARATED BY ANOTHER PREDETERMINED CLEARANCE.
Claim 2
Dependent Claim
125 words
IN A SEALING AND CENTERING DEVICE FOR A ROTATABLE SHAFT, A ROTATABLE SHAFT, A FIRST HIGH PRESSURE SPACE, A SECOND LOWER PRESSURE SPACE, A FIXED WALL SEPARATING SAID FIRST HIGHER PRESSURE SPACE AND SAID SECOND LOWER PRESSURE SPACE, FIRST AND SECOND PORTIONS OF SAID SHAFT DISPOSED IN THAT ORDER FROM SAID FIRST TO SAID SECOND SPACE, FIRST AND SECOND SLEEVES IN SAID WALL CONFRONTING SAID FIRST AND SECOND PORTIONS, RESPECTIVELY, MEANS FOR ESTABLISHING A PRESSURE CLOSE TO SAID LOWER PRESSURE BETWEEN SAID FIRST AND SECOND SLEEVES, AND HELICAL GROOVE MEANS FORMED IN ONE AT LEAST OF SAID SECOND PORTION AND SLEEVE, SAID FIRST PORTION AND SLEEVE BEING SMOOTH AND SEPARATED BY A CLEARANCE, AND SAID SECOND PORTION AND SLEEVE BEING SEPARATED BY ANOTHER PREDETERMINED CLEARANCE.
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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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |