Patent US3321372A successfully refreshed from Google Patents.
US3321372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear reactor control mechanism
Assignee: Anglo-Belge Vulcain Sa Ste
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Filing: 1964-12-23
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Granted: 1967-05-23
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Expires: 1984-12-23
Abstract
No abstract record available.
Inventors
- 👤 Challender Ronald Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:30
CPC Classifications
G; G21; G21C; G21C7/00; G21C7/06; G21C7/08; G21C7/12; G21C7/16; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
IN A NUCLEAR REACTOR CONTROL MECHANISM HAVING A MOVABLE REACTIVITY CONTROL ELEMENT AND A FLUID-OPERATED PISTON AND CYLINDER DEVICE FOR MOVEMENT OF SAID ELEMENT, THE IMPROVEMENT WHEREIN SAID DEVICE COMPRISES: A STATIONARY HOLLOW PISTION ROD; A STATIONARY PISTON MOUNTED ON SAID PISTON ROD; A DRIVE CYLINDER CONNECTED TO SAID CONTROL ELEMENT AND MOVABLY MOUNTED ON SAID PISTON; SAID PISTON ROD HAVING APERTURES WHICH COMMUNICATE BETWEEN THE HOLLOW INTERIOR OF SAID PISTION ROD AND THE INSIDE OF SAID DRIVE CYLINDER SO THAT FLUID PRESSURE WITHIN SAID CYLINDER CAN BE ADJUSTED THROUGH SAID HOLLOWPISTON ROD; A RELIEF VALVE LOCATED IN SAID STATIONARY PISTON AND HAVING AN OPEN AND CLOSED POSITION, SAID VALVE HAVING MEANS NORMALLY BIASSING IT INTO SAID OPEN POSITION; AND A PILOT PISTION MOVABLY MOUNTED WITHIN SAID HOLLOW PISTION ROD SO AS TO BE RESPONSIVE TO PRESSURES THEREIN AND LINKED TO SAID RELIEF VALVE FOR MOVING UNDE THE ACTION OF FLUID PRESSURE WITHIN SAID PISTON ROD AND BLOCKING SAID APERTURES WHEN SAID RELIEF VALVE MOVES TO OPEN POSITION AND UNBLOCKING SAID APERTURES WHEN SAID RELIEF VALVE MOVES TO SAID CLOSED POSITION.
Claim 2
Dependent Claim
181 words
IN A NUCLEAR REACTOR CONTROL MECHANISM HAVING A MOVABLE REACTIVITY CONTROL ELEMENT AND A FLUID-OPERATED PISTON AND CYLINDER DEVICE FOR MOVEMENT OF SAID ELEMENT, THE IMPROVEMENT WHEREIN SAID DEVICE COMPRISES: A STATIONARY HOLLOW PISTION ROD; A STATIONARY PISTON MOUNTED ON SAID PISTON ROD; A DRIVE CYLINDER CONNECTED TO SAID CONTROL ELEMENT AND MOVABLY MOUNTED ON SAID PISTON; SAID PISTON ROD HAVING APERTURES WHICH COMMUNICATE BETWEEN THE HOLLOW INTERIOR OF SAID PISTION ROD AND THE INSIDE OF SAID DRIVE CYLINDER SO THAT FLUID PRESSURE WITHIN SAID CYLINDER CAN BE ADJUSTED THROUGH SAID HOLLOWPISTON ROD; A RELIEF VALVE LOCATED IN SAID STATIONARY PISTON AND HAVING AN OPEN AND CLOSED POSITION, SAID VALVE HAVING MEANS NORMALLY BIASSING IT INTO SAID OPEN POSITION; AND A PILOT PISTION MOVABLY MOUNTED WITHIN SAID HOLLOW PISTION ROD SO AS TO BE RESPONSIVE TO PRESSURES THEREIN AND LINKED TO SAID RELIEF VALVE FOR MOVING UNDE THE ACTION OF FLUID PRESSURE WITHIN SAID PISTON ROD AND BLOCKING SAID APERTURES WHEN SAID RELIEF VALVE MOVES TO OPEN POSITION AND UNBLOCKING SAID APERTURES WHEN SAID RELIEF VALVE MOVES TO SAID CLOSED POSITION.
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) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |