Patent EP0043973A1 successfully refreshed from Google Patents.
Patent US3629069A successfully refreshed from Google Patents.
US3629069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactor tube end closure
Assignee: Atomic Energy of Canada Ltd AECL
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Filing: 1969-09-22
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Granted: 1971-12-21
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Expires: 1989-09-22
Abstract
Abstract A reactor tube end closure, comprising a cup-shaped closure body having a chamfered edge for engagement with a tapered surface on the inside of a reactor tube. A rotatable threaded spindle secured in the body has an internally threaded collar on it which carries a plurality of outwardly urged, spring-loaded struts. The struts form a collet assembly with each strut having a pad on its outer end for engagement in a recess in the reactor tube. By rotating a serrated wheel on the spindle in one direction the struts can be retracted to disengage the closure from the reactor tube, or by rotating in the other direction urge the seal faces into contact to form a leaktight seal.
Inventors
- 👤 James R Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:58
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/02; G21C13/06; G21C13/067; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
34 words
An end closure according to claim 1, wherein a central rod extends into and is connected to said cup-shaped member, and said threaded spindle is a hollow spindle rotatably mounted about said central rod.
Claim 2
Dependent Claim
44 words
An end closure according to claim 2, wherein said central rod extends out of said cup-shaped member beyond said hollow spindle, and an exposed end portion of said central rod is waisted to provide a gripping portion for a grab of a fueling machine.
Claim 3
Dependent Claim
20 words
An end closure according to claim 1, wherein said cup-shaped body has means for connecting a nuclear fuel stringer thereto.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |