Patent US3607639A successfully refreshed from Google Patents.
US3607639A
Expired / Lapsed
US
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Fuel assembly for nuclear reactors
Assignee: ABB Norden Holding AB
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Filing: 1968-07-11
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Granted: 1971-09-21
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Expires: 1988-07-11
Abstract
Abstract A fuel assembly for nuclear reactors is formed of a plurality of substantially parallel fuel rods arranged between a top plate and a bottom member inside a sheathing tube. Spacer elements for these tubes are provided with leaf springs secured to the spacer frames, the free ends of the springs having buttons thereon engaging in holes in the sheathing tube to position the spacer elements in the tube.
Inventors
- 👤 Aart Van Santen
- 👤 Lars-Erik Samskog
- 👤 Lars Tornblom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:45
CPC Classifications
G; G21; G21C; G21C3/00; G21C3/30; G21C3/32; G21C3/33; G21C3/3315; G21C3/3305; G21C3/332; G21C3/334; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
26 words
A fuel assembly according to claim 1, wherein the hole is arranged in the wall of the sheathing tube and the peg on the spring means.
Claim 2
Dependent Claim
15 words
A fuel assembly according to claim 1, wherein the spring means comprises a resilient tongue.
Claim 3
Dependent Claim
27 words
A fuel assembly according to claim 1, wherein the sheathing tube is detachably attached to the top plate and axially movable with respect to the bottom member.
Claim 4
Dependent Claim
45 words
A fuel assembly according to claim 1, wherein the bottom member comprises a separate bottom plate and a separate transition part wherein the sheathing tube is detachably attached to the top plate and rigidly attached to the transition part on which the bottom plate rests.
Claim 5
Dependent Claim
18 words
A fuel assembly according to claim 5, wherein the sheathing tube is rigidly connected to the transition part.
Claim 6
Dependent Claim
17 words
A fuel assembly according to claim 4, wherein the sheathing tube is screwed to the top plate.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |