US3841547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic welding assembly
Assignee: Zeta International Engineering Inc
•
Filing: 1972-08-21
•
Granted: 1974-10-15
•
Expires: 1992-08-21
Abstract
Abstract An automatic welding assembly is adapted to weld around pipes at a job site in situations where very little radial clearance is available at the weld position. The welding apparatus includes a collet device which clamps onto the free end of the pipe, and a support assembly rotatable on the collet and located for the most part beyond the free end of the pipe outside the region of restricted radial clearance. The support assembly includes an extensible carrier and a welding head is supported by the carrier. The carrier is extensible axially alongside the pipe to position the welding head at the correct position for effecting the circumferential welding pass within the region of restricted radial clearance. The collet includes a gear and a drive motor on the support assembly has a pinion meshing with the gear to rotate the support assembly. Provision is made for adjusting the angularity of the welding head and mechanism is also provided to traverse the welding head back and forth during the circumferential path.
Inventors
- 👤 J Bartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:14
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; B23K9/0282; B23K9/0286
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
252 words
A welding assembly adapted to be affixed to and supported on an end of a tubular member to be welded while effecting a circumferential weld therearound at a position disposed axially from said end thereof, comprising in combination: support means adapted to receive and affix to said end of a tubular member; a table surmounting said support means; means interconnecting said table and said support means for rotatably mounting said table about a first axis substantially coincidental with the axis of the tubular member; a pair of elongate support members fixed to said table radially outwardly of said first axis and extending parallel to said first axis; an extensible carrier bar slidably received in each support member to project beyond said table alongside the tubular member; a carrier foot interconnecting those ends of said carrier bars projecting beyond said table; a carrier body mounted on said carrier foot about a tilting axis lying in a plane transverse to the tubular member; a welding head support member mounted on said carrier body; means for adjustably positioning said carrier body about said tilting axis; a welding head fixed to said welding head support member; means supported from said table for feeding welding wire to said welding head; means for selectively extending said carrier bars to position the welding head along the tubular member; and drive means carried by said table and reacting with said support means to rotate said table about its axis thereby to move said welding head circumferentially around the tubular member.
Claim 2
Dependent Claim
252 words
A welding assembly adapted to be affixed to and supported on an end of a tubular member to be welded while effecting a circumferential weld therearound at a position disposed axially from said end thereof, comprising in combination: support means adapted to receive and affix to said end of a tubular member; a table surmounting said support means; means interconnecting said table and said support means for rotatably mounting said table about a first axis substantially coincidental with the axis of the tubular member; a pair of elongate support members fixed to said table radially outwardly of said first axis and extending parallel to said first axis; an extensible carrier bar slidably received in each support member to project beyond said table alongside the tubular member; a carrier foot interconnecting those ends of said carrier bars projecting beyond said table; a carrier body mounted on said carrier foot about a tilting axis lying in a plane transverse to the tubular member; a welding head support member mounted on said carrier body; means for adjustably positioning said carrier body about said tilting axis; a welding head fixed to said welding head support member; means supported from said table for feeding welding wire to said welding head; means for selectively extending said carrier bars to position the welding head along the tubular member; and drive means carried by said table and reacting with said support means to rotate said table about its axis thereby to move said welding head circumferentially around the tubular member.
Claim 3
Dependent Claim
53 words
A welding assembly as defined in claim 1 including guide means mounting said welding head support member for in and out movement with respect to said carrier body, and transversing means on said carrier body for reciprocating said welding head support member back and forth along said guide means during a welding operation.
Claim 4
Dependent Claim
27 words
A welding assembly as defined in claim 2 wherein said traversing means includes an adjustable eccentric for varying the reciprocating stroke of said welding head support member.
Claim 5
Dependent Claim
207 words
An automatic welding assembly comprising, in combination: collet means adapted clampingly to engage an end portion of a tubular member which is to be welded circumferentially at a position axially displaced from said end portion; a support assembly rotatably mounted on said collet means and disposed in major part beyond said end portion of the tubular member, said support assembly including drive means interacting with said collet means to rotate the support assembly and effect a circumferential welding pass around said tubular member aud extensible carrier means for establishing the axial position at which said welding pass is made; and a welding head supported by said extensible carrier means; said support assembly including a platform disposed in a plane perpendicular to the axis of said tubular member and projecting radially outwardly of said collet means, and a pair of parallel uprights fixed to said platform radially outwardly of said collet means and extending parallel to said axis of the tubular member; said extensible carrier means including a pair of carrier bars slidably received in said uprights, means for selective extension and retraction of said carrier bars relative to said uprights, and a carrier foot interconnecting said carrier bars, said welding head being mounted on said carrier foot.
Claim 6
Dependent Claim
207 words
An automatic welding assembly comprising, in combination: collet means adapted clampingly to engage an end portion of a tubular member which is to be welded circumferentially at a position axially displaced from said end portion; a support assembly rotatably mounted on said collet means and disposed in major part beyond said end portion of the tubular member, said support assembly including drive means interacting with said collet means to rotate the support assembly and effect a circumferential welding pass around said tubular member aud extensible carrier means for establishing the axial position at which said welding pass is made; and a welding head supported by said extensible carrier means; said support assembly including a platform disposed in a plane perpendicular to the axis of said tubular member and projecting radially outwardly of said collet means, and a pair of parallel uprights fixed to said platform radially outwardly of said collet means and extending parallel to said axis of the tubular member; said extensible carrier means including a pair of carrier bars slidably received in said uprights, means for selective extension and retraction of said carrier bars relative to said uprights, and a carrier foot interconnecting said carrier bars, said welding head being mounted on said carrier foot.
Claim 7
Dependent Claim
111 words
An automatic welding assembly as defined in claim 4 including a bracket fixed to said carrier foot, a plate pivotally connected to said bracket about a pivot axis transverst to the extension and retraction path of the carrier foot, means for selectively adjusting the position of said plate about said pivot axis, a pair of parallel guide rods fixed to said plate and having their axes contained in a plane perpendicular to said pivot axis, a welding head support block slidably engaged with said guide rods, and second drive means for reciprocating said support block back and forth on said guide rods, said welding head being carried by said support block.
Claim 8
Dependent Claim
45 words
An automatic welding assembly as defined in claim 5 wherein said second drive means comprises a drive motor fixed to said plate and having an output shaft, an eccentric driven by said output shaft, and said support block having a cam recess receiving said eccentric.
Claim 9
Dependent Claim
26 words
An automatic welding assembly as defined in claim 6 wherein said eccentric is adjustable selectively to establish the stroke of reciprocatory movement of said support block.
References Cited (Backward Citations)
US3062949A
Cited
US3159734A
Cited
US3025386A
Cited
US3215812A
Cited
US3688076A
Cited
US3708099A
Cited
US3776449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |