Patent US2628572A successfully refreshed from Google Patents.
US2937984A
Expired / Lapsed
US
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Control rod drive
Assignee: Individual
•
Filing: 1956-12-28
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Granted: 1960-05-24
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Expires: 1976-12-28
Abstract
No abstract record available.
Inventors
- 👤 Robert A Chapellier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
G; G21; G21C; G21C7/00; G21C7/06; G21C7/08; G21C7/12; G21C7/14; G21C7/16; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18592
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
IN A NUCLEAR REACTOR HAVING A REACTOR VESSEL HOUSING THE CORE OF THE REACTOR AND HAVING A PRESSURIZED COOLANT CONTAINED THEREIN, THE COMBINATION OF CONTROL ROD DRIVE MEANS COMPRISING AN ELONGATED HOUSING EXTENDING FROM AND OPEN INTO THE VESSEL, A PISTON DISPOSED IN SAID HOUSING COAXIAL THEREWITH FOR MOVEMENT AXIALLY THEREWITHIN AND HAVING A PASSAGEWAY EXTENDING THERETHROUGH CONVEYING THE REACTOR COOLANT TO THE OUTER END THEREOF, SAID PISTON FORMING WITH SAID HOUSING A CHAMBER BOUNDED AT LEAST IN PART AT ONE END BY SAID PISTON AND AT THE OTHER END BY SAID HOUSING, A RESTRICTED PASSAGE ADMITTING THE PRESSURIZED COOLANT TO SAID CHAMBER, SAID PISTON BEING CONSTRUCTED AND ARRANGED SO THAT THE FORCES EXERTED AGAINST SAID PISTON AXIALLY THEREOF BY SAID COOLANT ARE NORMALLY SUBSTANTIALLY BALANCED, MEANS FOR INDEPENDENTLY RELIEVING THE PRESSURE FROM SAID CHAMBER TO THEREBY UNBALANCE THESE FORCES AND CREATE A PREDETERMINED FORCE
References Cited (Backward Citations)
US2660026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |