Patent US3131939A successfully refreshed from Google Patents.
US3131939A
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Shaft seal for gas-filled machine
Assignee: BBC Brown Boveri AG Germany
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Filing: 1961-10-12
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Granted: 1964-05-05
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Expires: 1981-10-12
Abstract
No abstract record available.
Inventors
- 👤 Cuny Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:24
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/02; F01D11/04; F16; F16J; F16J15/00; F16J15/16; F16J15/40; H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/124; Y; Y10; Y10S; Y10S277/00; Y10S277/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
SEALING DEVICE FOR SEALING THE ROTATABLE SHAFT OF A GAS-FILLED MACHINE, PARTICULARLY HYDROGEN-COOLED TURBOGENERATOR, UTILIZING AN ANNULAR PRESSURE CHAMBER LOCATED IN A SLEEVE MEMBER SURROUNDING THE SHAFT AND SUPPLIED WITH DEGASSED SEALING LIQUID, CHARACTERIZED IN THAT ON AT LEAST ONE SIDE OF SAID PRESSURE CHAMBER AN ADDITIONAL ANNULAR CHAMBER IS PROVIDED WHICH IS IN COMMUNICATION WITH SAID FIRST ANNULAR CHAMBER BY WAY OF AN ANNULAR GAP BETWEEN THE SHAFT AND SAID CHAMBERS, SAID SECOND CHAMBER BEING SUPPLIED WITH SEALING LIQUID CONTAINING A GAS.
Claim 2
Dependent Claim
83 words
SEALING DEVICE FOR SEALING THE ROTATABLE SHAFT OF A GAS-FILLED MACHINE, PARTICULARLY HYDROGEN-COOLED TURBOGENERATOR, UTILIZING AN ANNULAR PRESSURE CHAMBER LOCATED IN A SLEEVE MEMBER SURROUNDING THE SHAFT AND SUPPLIED WITH DEGASSED SEALING LIQUID, CHARACTERIZED IN THAT ON AT LEAST ONE SIDE OF SAID PRESSURE CHAMBER AN ADDITIONAL ANNULAR CHAMBER IS PROVIDED WHICH IS IN COMMUNICATION WITH SAID FIRST ANNULAR CHAMBER BY WAY OF AN ANNULAR GAP BETWEEN THE SHAFT AND SAID CHAMBERS, SAID SECOND CHAMBER BEING SUPPLIED WITH SEALING LIQUID CONTAINING A GAS.
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 |