Patent US4976912A successfully refreshed from Google Patents.
US4976912A
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Apparatus for sealing a container for the storage of radioactive material
Assignee: BRENNELEMENTLAGER GORLEBEN A CORP OF FEDERAL REPUBLIC OF GERMANY GmbH
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Filing: 1989-03-20
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Granted: 1990-12-11
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Expires: 2009-03-20
Abstract
Abstract Apparatus for welding and testing a weld on a cover for a container for radioactive material. Two carriages are mounted on a bridge extending across and above the container. Gas shielded arc welders are mounted on the carriages. The carriages move across the bridge to accurately locate the welder with respect to the joint being welded. The container is mounted on a rotating platform to move the weld area past the welder and the test devices which are fixed when in working position.
Inventors
- 👤 Wolfgang Madle
- 👤 Norbert Gawlik
- 👤 Franz W. Popp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:14
CPC Classifications
G; G21; G21F; G21F7/00; G21F5/00; G21F5/06; G21F5/12; G21F9/00; G21F9/28; G21F9/34; G21F9/36; Y; Y10; Y10S; Y10S220/00; Y10S220/29
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
In an apparatus for sealing a cover to the inner container of a double container assembly for the transport and storage of radioactive material, said apparatus having a horizontal rotating platform for supporting said container assembly including welding and testing devices, the improvement comprising a horizontally moveable bridge mounted on tracks disposed on opposite sides of and above said container assembly, a pair of carriages mounted on said bridge for moving across the bridge, welding and testing devices mounted on said carriages, means for vertically adjusting said welding and testing devices into work or standby positions with respect to said container assembly, said welding device having two gas shielded arc welders with tungsten electrodes positioned opposite each other on one of said carriages, and means for controlling the movement of said carriages independently of each other.
Claim 2
Dependent Claim
136 words
In an apparatus for sealing a cover to the inner container of a double container assembly for the transport and storage of radioactive material, said apparatus having a horizontal rotating platform for supporting said container assembly including welding and testing devices, the improvement comprising a horizontally moveable bridge mounted on tracks disposed on opposite sides of and above said container assembly, a pair of carriages mounted on said bridge for moving across the bridge, welding and testing devices mounted on said carriages, means for vertically adjusting said welding and testing devices into work or standby positions with respect to said container assembly, said welding device having two gas shielded arc welders with tungsten electrodes positioned opposite each other on one of said carriages, and means for controlling the movement of said carriages independently of each other.
Claim 3
Dependent Claim
33 words
The apparatus of claim 1 in which said testing device is mounted on the other of said carriages together with a plasma hot wire welder for applying a cladding layer on said cover.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1 which includes a submerged arc welder mounted on said one carriage.
References Cited (Backward Citations)
US3987666A
Cited
US4330711A
Cited
US4445042A
Cited
US4673814A
Cited
US4596688A
Cited
US4572959A
Cited
US4548785A
Cited
US4594214A
Cited
US8569818B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |