Patent US3733251A successfully refreshed from Google Patents.
US3733251A
Expired / Lapsed
US
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Control rod release mechanism
Assignee: Combustion Engineering Inc
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Filing: 1971-06-22
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Granted: 1973-05-15
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Expires: 1991-06-22
Abstract
Abstract A control rod release mechanism utilizing a pneumatically actuated mechanical gripper device located immediately above the reactor core region and remotely connected to the control rod drive mechanism. the pneumatic system includes a pressure source which exerts a force on a gripper actuating member in a direction to initiate positive gripping action of control rod extension shaft by the gripper device. The actuating member is spring biased towards a positive grip release initiating position so that release of the pressure of the pneumatic system will always serve to disconnect the control rod extension shaft from the gripper device.
Inventors
- 👤 J Gilbertson
- 👤 R Gorsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:53
CPC Classifications
G; G21; G21C; G21C7/00; G21C7/06; G21C7/08; G21C7/12; Y; Y02; Y02E; Y02E30/00; Y02E30/30
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |