US3552753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High efficiency static seal assembly
Assignee: Westinghouse Electric Corp
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Filing: 1968-06-26
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Granted: 1971-01-05
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Expires: 1988-06-26
Abstract
Abstract AN ANNULAR STATIC SHIELD IS PROVIDED AT THE ENTRANCE TO THE STATOR OF AN AXIAL FLOW TURNINE. THE SEAL INCLUDES TWO ADJACENT SPRING LOADED SEGMENTED RINGS SO ARRANGED IN A SEAL HOUSING THAT THE GAPS BETWEEN SEGMENTS OF THE HIGH PRESSURE RING OVERLAP THE GAPS BETWEEN SEGMENTS OF THE LOW PRESSURE RING. THE SEGMENTS OF THE LOW PRESSURE RING ARE ORIENTED CIRCUMFERENTIALLY TO BE IN LINE WITH THE GAPS IN THE INNER SHROUD OF A STATOR VANE SEGMENT. THUS, A RADIAL OFFSET BETWEEN TWO ADJACENT SHROUD ENDS WILL NOT PUSH THE SEGMENTS OF THE LOW PRESSURE SEAL AWAY FROM CONTACT WITH THE SHROUD SEALING SURFACE.
Inventors
- 👤 George M Mierley Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:56
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |