Patent US3592997A successfully refreshed from Google Patents.
US3592997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal forming
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1966-11-09
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Granted: 1971-07-13
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Expires: 1986-11-09
Abstract
Abstract A method of sealing a metallic tubular workpiece by rotating the workpiece relatively to a welding torch arranged transversely with respect to the axis of the workpiece, the speed of rotation of the workpiece relative to the torch being increased while the current fed to the torch is reduced so that the workpiece is cut into two portions, at least one having a sealed end closure formed by recasting of the metal of the workpiece melted by the torch.
Inventors
- 👤 Philip Ian Durie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:03
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/06; G21C3/10; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
108 words
A method of sealing a metallic tubular workpiece using a welding torch arranged transversely with respect to the axis of the workpiece characterized in that the workpiece is supported to either side of the torch and in that with relative rotation being established between the torch and the workpiece and an arc being struck between the torch and the workpiece, the relative speed of rotation is increased while the current fed to the torch is reduced so that the workpiece is cut into two portions, at least one having a sealed end closure formed by recasting of the metal of the workpiece in the region of the arc.
Claim 2
Independent Claim
108 words
A method of sealing a metallic tubular workpiece using a welding torch arranged transversely with respect to the axis of the workpiece characterized in that the workpiece is supported to either side of the torch and in that with relative rotation being established between the torch and the workpiece and an arc being struck between the torch and the workpiece, the relative speed of rotation is increased while the current fed to the torch is reduced so that the workpiece is cut into two portions, at least one having a sealed end closure formed by recasting of the metal of the workpiece in the region of the arc.
Claim 3
Dependent Claim
26 words
A method of sealing a metallic tubular workpiece as claimed in claim 1 wherein the workpiece is fitted either side of the torch with metal chills.
Claim 4
Dependent Claim
87 words
A method of sealing a metallic tubular workpiece as claimed in claim 1 wherein a second weld run is made with the torch set at the edge of the sealed end closure as formed By the method of claim 1, an arc being struck between the torch and the edge of the sealed end closure, and relative rotation being established between the workpiece and the torch, the relative speed of rotation of the torch and workpiece being increased while the current fed to the torch is reduced.
Claim 5
Dependent Claim
15 words
A tubular workpiece having a sealed end closure made by the method of claim 1.
Claim 6
Dependent Claim
15 words
A tubular workpiece having a sealed end closure made by the method of claim 2.
Claim 7
Dependent Claim
15 words
A tubular workpiece having a sealed end closure made by the method of claim 3.
Claim 8
Independent Claim
112 words
A method of sealing a metallic tubular nuclear reactor fuel element sheath using a welding torch arranged transversely with respect to the axis of the sheath characterized in that the sheath is supported to either side of the torch and in that with relative rotation being established between the torch and the sheath and an arc being struck between the torch and the sheath, the relative speed of rotation is increased while the current fed to the torch is reduced so that the sheath is cut into two portions, at least one having a sealed end closure formed by recasting of the metal of the sheath in the region of the arc.
Claim 9
Independent Claim
112 words
A method of sealing a metallic tubular nuclear reactor fuel element sheath using a welding torch arranged transversely with respect to the axis of the sheath characterized in that the sheath is supported to either side of the torch and in that with relative rotation being established between the torch and the sheath and an arc being struck between the torch and the sheath, the relative speed of rotation is increased while the current fed to the torch is reduced so that the sheath is cut into two portions, at least one having a sealed end closure formed by recasting of the metal of the sheath in the region of the arc.
Claim 10
Dependent Claim
30 words
A method of sealing a metallic tubular nuclear reactor fuel element sheath as claimed in claim 7 wherein the sheath is fitted either side of the torch with metal chills.
Claim 11
Dependent Claim
91 words
A method of sealing a metallic tubular nuclear reactor fuel element sheath as claimed in claim 7 wherein a second weld run is made with the torch set at the edge of the sealed end closure as formed by the method of claim 7, an arc being struck between the torch and the edge of the sealed end closure, and relative rotation being established between the sheath and the torch, the relative speed of rotation of the torch and sheath being increased while the current fed to the torch is reduced.
References Cited (Backward Citations)
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Cited
US2309561A
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US2313068A
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US2322444A
Cited
US2397717A
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US3067321A
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |