US3621182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary welding gun
Assignee: Individual
•
Filing: 1969-11-28
•
Granted: 1971-11-16
•
Expires: 1989-11-28
Abstract
Abstract A rotary welding gun comprising a handle, an intake of gas utilized to prevent any oxidation of the weld, an inlet of cooling water, an electric current input, all the intakes being contained in a conduit in the interior of the handle, a built-in motor driving an axial shaft, a positioning mandrel projecting towards the exterior round the said axial shaft at its free extremity opposite to that of the motor, a centering means, a torch-mounted eccentric radially with respect to said mandrel, axial-adjusting means for the position of the torch, expansion means adjustable in relation to the mandrel so as to center said mandrel radially with respect to the internal surface of a tube to be welded, at the same time permitting rotation of the mandrel inside the tube.
Inventors
- 👤 Jean-Pierre Peyrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:20
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; B23K9/0288
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
A rotary welding gun comprising a handle, an inlet for the intake of gas utilized to prevent any oxidation of the weld, an inlet of cooling water, an inlet for electric current input, all said inlets being contained in a conduit in the interior of the handle, a built-in motor driving an axial shaft, a positioning rotational joining mandrel projecting towards the exterior around the said axial shaft at its free extremity opposite to that of the motor, a centering means controlling said mandrel from a distance, a torch mounted eccentric radially with respect to the rotational axis of the centering position of said mandrel, axial adjusting means for the position of the torch, expansion means adjustable in relation to the mandrel at its extremities on two levels inside a pipe to be welded so as to center from far away said mandrel radially with respect to the internal surface of the pipe to be welded, at the same time permitting rotation of expansion means of the mandrel against the internal wall of the pipe.
Claim 2
Dependent Claim
175 words
A rotary welding gun comprising a handle, an inlet for the intake of gas utilized to prevent any oxidation of the weld, an inlet of cooling water, an inlet for electric current input, all said inlets being contained in a conduit in the interior of the handle, a built-in motor driving an axial shaft, a positioning rotational joining mandrel projecting towards the exterior around the said axial shaft at its free extremity opposite to that of the motor, a centering means controlling said mandrel from a distance, a torch mounted eccentric radially with respect to the rotational axis of the centering position of said mandrel, axial adjusting means for the position of the torch, expansion means adjustable in relation to the mandrel at its extremities on two levels inside a pipe to be welded so as to center from far away said mandrel radially with respect to the internal surface of the pipe to be welded, at the same time permitting rotation of expansion means of the mandrel against the internal wall of the pipe.
Claim 3
Dependent Claim
79 words
A welding gun as claimed in claim 1, in which said centering means controls two bearings of balls disposed at said two levels by means of a sleeve included between said two ball bearings, said ball bearings being housed between two conical rings respectively provided, on the one hand, on the extremities of the sleeve and on the other hand, on the extremity of said shaft connected to said centering means and on the periphery of said joining mandrel.
Claim 4
Dependent Claim
78 words
A welding gun as claimed in claim 1 and further comprising a torch support, a torch extremity, an electrode, the position of said torch with respect to the parts to be welded being fixed axially by means of a stop integral with the gun which is abutting with the pipe to be welded before the closing of the clamp and a threaded mounting permitting the electrode to be displaced axially inside the gun with respect to said stop.
Claim 5
Dependent Claim
22 words
A welding gun as claimed in claim 1, and further comprising an adjusting knob for controlling the said expansion of the mandrel.
Claim 6
Dependent Claim
72 words
A welding gun as claimed in claim 4, in which said adjusting knob is located at the breech of the gun so as to displace said axial shaft axially with respect to said mandrel and thus to force said balls radially towards the exterior with respect to the sleeve, so as to apply the external surface of the balls against the internal surface of the pipe while permitting said balls to rotate.
Claim 7
Dependent Claim
23 words
A welding gun as claimed in claim 1, in which said torch is totally compacted inside the external diameter of the rotational parts.
Claim 8
Dependent Claim
27 words
A welding gun as claimed in claim 1 in which said expansion means comprises a spring to allow sufficient elasticity to said bearings during their rotational path.
Claim 9
Dependent Claim
13 words
A welding gun as claimed in claim 1 comprising a transparent quartz tube.
Claim 10
Dependent Claim
22 words
A welding gun as claimed in claim 1 comprising a rotating mercury contact for the alimentation of the current of said torch.
References Cited (Backward Citations)
US3125669A
Cited
US3134894A
Cited
US3159734A
Cited
US2908805A
Cited
US3142745A
Cited
US3207408A
Cited
US3345494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |