Patent US3227418A successfully refreshed from Google Patents.
US3227418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable clearance seal
Assignee: General Electric Co
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Filing: 1963-11-04
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Granted: 1966-01-04
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Expires: 1983-11-04
Abstract
No abstract record available.
Inventors
- 👤 West Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:07
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F01D11/14; F01D11/20; F01D11/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
AN AXIAL FLOW TURBOMACHINE COMPRISING: A CYLINDRICAL OUTER CASING, SAID OUTER CASING HAVING MEANS FORMING A PLURALITY OF HELICAL GROOVES ON THE INNER SURFACE THEREOF; AN ANNULAR SHAPED SHROUD, FITTING WITHIN SAID CASING AND HAVING OUTER RADIALLY EXTENDING PROJECTIONS INTERFITTING WITH SAID CASING GROOVES TO SUPPORT SAID SHROUD, SAID SHROUD FORMING AN AXIALLY EXTENDING GAS PASSAGE HAVING ONE END OF A LARGER DIAMETER THAN THE OTHER; A ROTOR SUPPORTED FOR ROTATION WITHIN SAID SHROUD, SAID SHROUD AND ROTOR HAVING THEIR ADJACENT PORTIONS LYING IN STRAIGHT PARALLEL LINES INTERCEPTING THE AXIS OF ROTATION OF SAID ROTOR AT AN ACUTE ANGLE, SUCH THAT UPON ROTATION OF EITHER SAID LINES DEFINE A TRUNCATED CONE; MEANS TO ROTATE SAID SHROUD, WHEREIN BY ROTATION SAID SHROUD IS MOVED AXIALLY TO VARY THE RADIAL CLEARANCE BETWEEN IT AND SAID ROTOR.
Claim 2
Dependent Claim
134 words
AN AXIAL FLOW TURBOMACHINE COMPRISING: A CYLINDRICAL OUTER CASING, SAID OUTER CASING HAVING MEANS FORMING A PLURALITY OF HELICAL GROOVES ON THE INNER SURFACE THEREOF; AN ANNULAR SHAPED SHROUD, FITTING WITHIN SAID CASING AND HAVING OUTER RADIALLY EXTENDING PROJECTIONS INTERFITTING WITH SAID CASING GROOVES TO SUPPORT SAID SHROUD, SAID SHROUD FORMING AN AXIALLY EXTENDING GAS PASSAGE HAVING ONE END OF A LARGER DIAMETER THAN THE OTHER; A ROTOR SUPPORTED FOR ROTATION WITHIN SAID SHROUD, SAID SHROUD AND ROTOR HAVING THEIR ADJACENT PORTIONS LYING IN STRAIGHT PARALLEL LINES INTERCEPTING THE AXIS OF ROTATION OF SAID ROTOR AT AN ACUTE ANGLE, SUCH THAT UPON ROTATION OF EITHER SAID LINES DEFINE A TRUNCATED CONE; MEANS TO ROTATE SAID SHROUD, WHEREIN BY ROTATION SAID SHROUD IS MOVED AXIALLY TO VARY THE RADIAL CLEARANCE BETWEEN IT AND SAID ROTOR.
References Cited (Backward Citations)
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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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |