US3754114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable welding gun
Assignee: Individual
•
Filing: 1972-01-28
•
Granted: 1973-08-21
•
Expires: 1992-01-28
Abstract
Abstract A rotatable welding gun with an axial expansion means for centering radially a mandrel inside a tube to be welded, a reel for wire of welding metal rigidly fixed to the torch and the mandrel, permitting the weld in front of the torch to be supplied with welding metal during the rotation of the rotatable members.
Inventors
- 👤 J Peyrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:09
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; B23K9/0288; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20213
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
180 words
A rotatable welding gun comprising; a fixed body with a handle, a sheath for a fluid inlet and current supply leads extending inside said handle, a rotatable axial mandrel on one end of said fixed body, a torch disposed radially eccentric with respect to said mandrel, means for axially adjusting the position of said torch, adjustable expansion means for radially centering the mandrel inside a tube to be welded, a reel rigidly fixed to said mandrel from which wire welding metal may be unwound and fed up in front of said torch by roller means which carry said wire metal through a sleeve member up to said torch during rotation of rotatable parts which include a central tube rigidly fixed to said torch and to a driving unit for unwinding the wire, a driving motor for the torch on said fixed body and driving motor for the wire metal, said two motors having output pinions that are coupled together by means of an escaPement mechanism comprising a uni-directional clutch of the free-wheel type and a transmission with a differential action.
Claim 2
Dependent Claim
180 words
A rotatable welding gun comprising; a fixed body with a handle, a sheath for a fluid inlet and current supply leads extending inside said handle, a rotatable axial mandrel on one end of said fixed body, a torch disposed radially eccentric with respect to said mandrel, means for axially adjusting the position of said torch, adjustable expansion means for radially centering the mandrel inside a tube to be welded, a reel rigidly fixed to said mandrel from which wire welding metal may be unwound and fed up in front of said torch by roller means which carry said wire metal through a sleeve member up to said torch during rotation of rotatable parts which include a central tube rigidly fixed to said torch and to a driving unit for unwinding the wire, a driving motor for the torch on said fixed body and driving motor for the wire metal, said two motors having output pinions that are coupled together by means of an escaPement mechanism comprising a uni-directional clutch of the free-wheel type and a transmission with a differential action.
Claim 3
Dependent Claim
92 words
A rotatable welding gun as claimed in claim 1 in which the rotatable parts comprise a welding head round a centering mandrel, a rear unit, the central sleeve joining rigidly together the said welding head and the rear unit, the said rear unit carrying a winding reel for wire of welding metal, a roller driving device for the said wire, a motor for setting in rotation the rotatable parts, the said motor driving a pinion which engages internally on a fixed toothed wheel rigidly fixed to the casing of the said gun.
Claim 4
Dependent Claim
31 words
A rotatable welding gun as claimed in claim 2, in which the said motor for setting the mobile system into rotation is a tacheometric dynamo motor coupled to a pulse emitter.
Claim 5
Dependent Claim
40 words
A rotatable welding gun as claimed in claim 3, in which the said welding wire driving device mounted on the said rear unit carries a driving motor for the wire, a transmission belt, a driving roller and a supporting roller.
Claim 6
Dependent Claim
60 words
A rotatable welding gun as claimed in claim 4, in which the casing carries a fixed-collector with eight tracks on which the corresponding brushes of the rear unit of the mobile system collect the power necessary for the four wires of the tacheometer motor, the two wires of the wire driving motor and the two wires of the pulse emitter.
Claim 7
Dependent Claim
112 words
A rotatable welding gun as claimed in claim 1, in which the said mechanism comprises a toothed wheel engaging with a first motor and freely mounted around the tube driven by a second motor, and a crank handle rigidly fixed to the said tube, a transmission with a differential driving action on the supply rollers of the wire being mounted eccentrically with respect to the tube on the said crank handle, the said mechanism of the free-wheel clutch device type permitting the introduction into the said transmission of a movement controlled by the said toothed wheel when the angular speed of the said wheel exceeds the angular speed of the said tube.
Claim 8
Dependent Claim
98 words
A rotatable welding gun as claimed in claim 6, in which the said crank handle carries three pinions in engagement with each other, the input pinion turning freely on the said tube and the output pinion being connected by the transmission to the welding wire feed rollers, the input pinion being driven in uni-directional rotation with respect to the crank handle by the pawl-clutch device which couples it to the said toothed wheel driven by the first motor when the angular speed of the said wheel becomes greater than that of the tube driven by the second motor.
Claim 9
Dependent Claim
69 words
A rotatable welding gun as claimed in claim 1, in which a controlled atmosphere chamber coupled to the body of the gun comprises a cylindrical wall and at least one longitudinal conduit in the interior of the said cylindrical wall coupling an inlet of protective gas coming from the sheath to a circular collector which diffuses the gas over a frusto-conical layer directly on the zone to be welded.
Claim 10
Dependent Claim
29 words
A welding gun as claimed in claim 8, in which the said cylindrical wall is of quartz, two toric joints ensuring the fluid-tightness of the chamber at its extremities.
Claim 11
Dependent Claim
41 words
A welding gun as claimed in claim 9, in which the said quartz wall is gripped by three claws coupling the body of the gun to an abutment ring, the said ring comprising a collector coupled to the said longitudinal conduits.
Claim 12
Dependent Claim
26 words
A welding gun as claimed in claim 10, in which the said collector is coupled to a circular exhaust nozzle by means of a porous filter.
Claim 13
Dependent Claim
63 words
A gun as claimed in claim 11, in which the said nozzle is flattened to the form of a slot between two lips which incline the frusto-conical layer of gas towards the internal peripheral region of the said abutment ring, and towards the exterior with respect to the body of the gun so as to flow directly over the zone to be welded.
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |