US3235269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sealing a turbine or compressor shaft
Assignee: ABB Stal AB
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Filing: 1963-05-23
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Granted: 1966-02-15
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Expires: 1983-05-23
Abstract
No abstract record available.
Inventors
- 👤 Olesen Carsten Balslev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:32
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F01; F01D; F01D11/00; F01D11/02; F01D11/04; F01D11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
219 words
THE METHOD OF SEALING A TURBINE OR COMPRESSOR SHAFT BY MEANS OF A SEALING ARRANGEMENT LOCATED BETWEEN A CHAMBER CONTAINING VAPOUR SUCH AS HEAVY WATER (D2O) AND A BEARING, AND COMPRSING A SERIES OF CLEARANCE SEALS, WHICH CLEARANCE SEALS ARE SEPARATED FROM ONE ANOTHER BY CHAMBERS I, II, III AND IV IN SEQUENCE FROM THE BEARING AND LOCATED AROUND THE SHAFT, CHARACTERIZED IN THAT AIR OF ATMOSPHERIC PRESSURE IS ADMITTED TO THE CHAMBER II AND THAT AIR MIXED WITH OIL, FORMED BY OIL LEAKING TO THE CHAMBER I IN ONE DIRECTION ALONG THE SHAFT FROM THE BEARING, AND BY ATMOSPHERIC AIR LEAKING FROM THE CHAMBER II IN THE OPPOSITE DIRECTION, IS WITHDRAWN BY A FAN, MAINTAINING A PRESSURE LOWER THAN ATMOSPHERIC IN THE CHAMBER I, ADMITTING DRY BLOCKING AIR INTO THE CHAMBER III AT A PRESSURE HIGHER THAN ATMOSPHERIC AND WHICH AIR LEAKS ALONG THE SHAFTS PARTLY TO THE CHAMBER II AND PARTLY TO THE CHAMBER IV, TO WHICH LATTER CHAMBER D2O VAPOUR ALSO LEAKS FROM THE VAPOUR CHAMBER, AND THAT AIR AND D2O VAPOUR ARE WITHDRAWN FROM THE CHAMBER IV TO A LEAKAGE CONDENSER FROM WHICH D2O IS DISCHARGED AND D2O SATURATED AIR IS DRAWN INTO A DRYING DEVICE FROM WHICH D2O IS DISCHARGED AND DRY AIR IS ADMITTED TO THE CHAMBER III, WHICH DRY ATMOSPHERE IS ADDED.
Claim 2
Independent Claim
219 words
THE METHOD OF SEALING A TURBINE OR COMPRESSOR SHAFT BY MEANS OF A SEALING ARRANGEMENT LOCATED BETWEEN A CHAMBER CONTAINING VAPOUR SUCH AS HEAVY WATER (D2O) AND A BEARING, AND COMPRSING A SERIES OF CLEARANCE SEALS, WHICH CLEARANCE SEALS ARE SEPARATED FROM ONE ANOTHER BY CHAMBERS I, II, III AND IV IN SEQUENCE FROM THE BEARING AND LOCATED AROUND THE SHAFT, CHARACTERIZED IN THAT AIR OF ATMOSPHERIC PRESSURE IS ADMITTED TO THE CHAMBER II AND THAT AIR MIXED WITH OIL, FORMED BY OIL LEAKING TO THE CHAMBER I IN ONE DIRECTION ALONG THE SHAFT FROM THE BEARING, AND BY ATMOSPHERIC AIR LEAKING FROM THE CHAMBER II IN THE OPPOSITE DIRECTION, IS WITHDRAWN BY A FAN, MAINTAINING A PRESSURE LOWER THAN ATMOSPHERIC IN THE CHAMBER I, ADMITTING DRY BLOCKING AIR INTO THE CHAMBER III AT A PRESSURE HIGHER THAN ATMOSPHERIC AND WHICH AIR LEAKS ALONG THE SHAFTS PARTLY TO THE CHAMBER II AND PARTLY TO THE CHAMBER IV, TO WHICH LATTER CHAMBER D2O VAPOUR ALSO LEAKS FROM THE VAPOUR CHAMBER, AND THAT AIR AND D2O VAPOUR ARE WITHDRAWN FROM THE CHAMBER IV TO A LEAKAGE CONDENSER FROM WHICH D2O IS DISCHARGED AND D2O SATURATED AIR IS DRAWN INTO A DRYING DEVICE FROM WHICH D2O IS DISCHARGED AND DRY AIR IS ADMITTED TO THE CHAMBER III, WHICH DRY ATMOSPHERE IS ADDED.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |