Patent US645846A successfully refreshed from Google Patents.
Patent US3589829A successfully refreshed from Google Patents.
US3589829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutoff device for steam path of steam turbine
Assignee: Individual
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Filing: 1969-03-13
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Granted: 1971-06-29
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Expires: 1989-03-13
Abstract
Abstract A shutoff device for a steam turbine comprises a stationary annular member fixed in the turbine and having a circumferential array of spaced ports. A rotatable annular member is supported internally of the stationary annular member and which rotatable annular member surrounds the turbine shaft. The rotatable annular member includes a circumferential array of spaced ports also. The rotatable annular member is supported so that it may be moved and the ports thereof may be aligned with the ports of the stationary annular member so as to permit the passage of steam into the turbine portion. The rotatable annular member similarly is rotatable so as to bring its respective ports out of alignment with the ports of the stationary annular member so as to block the passage of steam into the turbine.
Inventors
- 👤 Anatoly Alexandrovic Schetinin
- 👤 Alexandr Konstantinovic Duleev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:55
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01B; F01B25/00; F01B2250/00; F01B2250/002
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
197 words
A shutoff device for a steam turbine, said turbine having a housing and a shaft rotatably supported in the housing, said device comprising a stationary annular member fixed in said housing and surrounding said shaft in spaced relation, said stationary annular member having a plurality of spaced ports in circumferential array, a diaphragm fixed in said housing and including a cylindrical sleeve surrounding said shaft in spaced relation, a rotatable annular member rotatably supported on said cylindrical sleeve and interposed between said cylindrical sleeve and said stationary annular member, said rotatable annular member having a plurality of ports in circumferential array, said rotatable annular member including an annular supporting portion rotatably engageable with said cylindrical sleeve and acting as a partition for preventing steam passing through the ports of the rotatable annular member from transversely engaging the shaft, said rotatable annular member being rotatably supported such that its respective ports are movable into alignment with respective ports of the stationary annular member and further rotatable such that its respective ports are movable out of alignment with respective ports of the stationary annular member and means for rotating said rotatable annular member relative to said stationary annular member.
Claim 2
Dependent Claim
197 words
A shutoff device for a steam turbine, said turbine having a housing and a shaft rotatably supported in the housing, said device comprising a stationary annular member fixed in said housing and surrounding said shaft in spaced relation, said stationary annular member having a plurality of spaced ports in circumferential array, a diaphragm fixed in said housing and including a cylindrical sleeve surrounding said shaft in spaced relation, a rotatable annular member rotatably supported on said cylindrical sleeve and interposed between said cylindrical sleeve and said stationary annular member, said rotatable annular member having a plurality of ports in circumferential array, said rotatable annular member including an annular supporting portion rotatably engageable with said cylindrical sleeve and acting as a partition for preventing steam passing through the ports of the rotatable annular member from transversely engaging the shaft, said rotatable annular member being rotatably supported such that its respective ports are movable into alignment with respective ports of the stationary annular member and further rotatable such that its respective ports are movable out of alignment with respective ports of the stationary annular member and means for rotating said rotatable annular member relative to said stationary annular member.
Claim 3
Dependent Claim
24 words
A shutoff device as claimed in claim 1 including packing elements interposed between the stationary and rotatable annular members and surrounding respective ports thereof.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |