Patent US3089969A successfully refreshed from Google Patents.
US3089969A
Expired / Lapsed
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Cooling arrangement for turbogenerators
Assignee: BBC Brown Boveri AG Germany
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Filing: 1956-10-15
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Granted: 1963-05-14
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Expires: 1976-10-15
Abstract
No abstract record available.
Inventors
- 👤 Wiedemann Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:43
CPC Classifications
H; H02; H02K; H02K9/00; H02K9/19; H02K9/197
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A COOLING SYSTEM FOR TURBO-GENERATORS, THE COMBINATION COMPRISING MEANS SEALING A CLOSED SPACE OCCUPIED BY THE ROTOR ELEMENT OF THE TURBO-GENERATOR FROM A CLOSED SPACE OCCUPIED BY THE STATOR ELEMENT OF THE TURBO-GENERATOR AND FROM THE SURROUNDING AIR, MEANS PROVIDING A CLOSED RE-CIRCULATION SYSTEM FOR CIRCULATING A COOLING GAS THROUGH THE ROTOR ELEMENT, MEANS PROVIDING A CLOSED RECIRCULATION SYSTEM FOR CIRCULATING A COOLING LIQUID THROUGH THE STATOR ELEMENT, SAID CLOSED SPACE OCCUPIED BY THE STATOR ELEMENT BEING FILLED WITH AN INCOMBUSTIBLE GAS AND SAID FILLING OF INCOMBUSTIBLE GAS BEING ENTIRELY SEPARATE FROM THE COOLING LIQUID OF THE STATOR COOLING SYSTEM, AND MEANS FOR REGULATING THE PRESSURE OF THE GAS FILLING IN THE SPACE OCCUPIED BY THE STATOR ELEMENT TO MAINTAIN SAID PRESSURE EQUAL TO THE PRESSURE OF THE COOLING GAS CIRCULATING THROUGH THE ROTOR ELEMENT.
Claim 2
Dependent Claim
136 words
IN A COOLING SYSTEM FOR TURBO-GENERATORS, THE COMBINATION COMPRISING MEANS SEALING A CLOSED SPACE OCCUPIED BY THE ROTOR ELEMENT OF THE TURBO-GENERATOR FROM A CLOSED SPACE OCCUPIED BY THE STATOR ELEMENT OF THE TURBO-GENERATOR AND FROM THE SURROUNDING AIR, MEANS PROVIDING A CLOSED RE-CIRCULATION SYSTEM FOR CIRCULATING A COOLING GAS THROUGH THE ROTOR ELEMENT, MEANS PROVIDING A CLOSED RECIRCULATION SYSTEM FOR CIRCULATING A COOLING LIQUID THROUGH THE STATOR ELEMENT, SAID CLOSED SPACE OCCUPIED BY THE STATOR ELEMENT BEING FILLED WITH AN INCOMBUSTIBLE GAS AND SAID FILLING OF INCOMBUSTIBLE GAS BEING ENTIRELY SEPARATE FROM THE COOLING LIQUID OF THE STATOR COOLING SYSTEM, AND MEANS FOR REGULATING THE PRESSURE OF THE GAS FILLING IN THE SPACE OCCUPIED BY THE STATOR ELEMENT TO MAINTAIN SAID PRESSURE EQUAL TO THE PRESSURE OF THE COOLING GAS CIRCULATING THROUGH THE ROTOR ELEMENT.
References Cited (Backward Citations)
US1522333A
Cited
US1657550A
Cited
US1543502A
Cited
US1686027A
Cited
DE657880C
Cited
US2687695A
Cited
US2727161A
Cited
DE896086C
Cited
US2675493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |