US3743812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-centering clamp for butt-welding tubes
Assignee: Individual
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Filing: 1971-08-16
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Granted: 1973-07-03
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Expires: 1991-08-16
Abstract
Abstract Self-centering welding clamp fitted with a rotating drum on which a filler-metal wire supply reel or spool is designed to feed the weld ahead of the electrode, said wire being driven by knurled wheels at a certain speed in one direction or another between an angled coupling connected to the fixed body of the clamp and a flexible sheath embedded inside the rotating drum by means of a system of synchronization between the motor of the drum and that of the knurled wheels in order to permit, in buttwelding two tubes by circular welding, to recharge the weld as desired with filler-metal.
Inventors
- 👤 J Peyrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:08
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; B23K9/0282; B23K9/0286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
207 words
A self-centering welding clamp comprising support body means for supporting the clamp, a rotating drum mounted for rotation on said support body means, a welding torch mounted for movement with said rotating drum, and means for feeding filler-metal wire at said welding torch at a predetermined speed regardless of direction and speed of rotation of said drum including said above mentioned rotating drum, supply reel means to supply filler-metal wire mounted on said support body means, motor means to drive said drum connected to said drum and mounted on said support body means, angled coupling means connected to said support body means to feed the filler-metal wire to said rotating drum, a pair of friction roller means for feeding the wire to said rotating drum through said angled coupling means at a variable speed during rotation of said drum in one direction and for withdrawing the wire through said angled coupling means at a variable speed during rotation of said drum in an opposite direction including a pair of friction rollers, and means connected to drive at least one of said pair of friction rollers, and a flexible sheath means in said rotating drum to receive the wire passing between said angled coupling meaNs and said sheath.
Claim 2
Dependent Claim
207 words
A self-centering welding clamp comprising support body means for supporting the clamp, a rotating drum mounted for rotation on said support body means, a welding torch mounted for movement with said rotating drum, and means for feeding filler-metal wire at said welding torch at a predetermined speed regardless of direction and speed of rotation of said drum including said above mentioned rotating drum, supply reel means to supply filler-metal wire mounted on said support body means, motor means to drive said drum connected to said drum and mounted on said support body means, angled coupling means connected to said support body means to feed the filler-metal wire to said rotating drum, a pair of friction roller means for feeding the wire to said rotating drum through said angled coupling means at a variable speed during rotation of said drum in one direction and for withdrawing the wire through said angled coupling means at a variable speed during rotation of said drum in an opposite direction including a pair of friction rollers, and means connected to drive at least one of said pair of friction rollers, and a flexible sheath means in said rotating drum to receive the wire passing between said angled coupling meaNs and said sheath.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |