US3608395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum rotor
Assignee: Studsvik Energiteknik AB
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Filing: 1968-06-17
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Granted: 1971-09-28
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Expires: 1988-06-17
Abstract
Abstract DRUM ROTOR HAVING A ROTATION-SYMMETRICAL, PREFERABLY CYLINDRICAL MANTLE AND AT LEAST ONE END WALL ATTACHED THERETO AND BEING ADAPTED TO BE ROTATED ABOUT ITS AXIS. THE MATERIAL IN THE END WALL HAS A RATIO BETWEEN DENSITY AND MODULE OF ELASTICITY WHICH IS SO MUCH HIGHER THAN THE CORRESPONDING RATIO FOR THE MANTLE THAT THE ELONGATIONS IN THE MANTLE AND THE END WALL IN THE JUNCTURE THEREBETWEEN DUE TO THE CENTRIFUGAL FORCE ARE ESSENTIALLY EQUAL.
Inventors
- 👤 Gunnar Walter Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:15
CPC Classifications
B; B04; B04B; B04B7/00; B04B7/08; B04B7/085; B01; B01D; B01D53/00; B01D53/24; B04B5/00; B04B5/08; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; Y; Y10; Y10S; Y10S494/00; Y10S494/90; Y10T; Y10T74/00; Y10T74/21; Y10T74/2109
Claims Analysis
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |