US3783230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gun for welding tubes on a tube plate
Assignee: Individual
•
Filing: 1972-08-10
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Granted: 1974-01-01
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Expires: 1992-08-10
Abstract
Abstract A rotatable welding gun comprising an electron gun, a secondary vacuum chamber around the said gun and a primary vacuum chamber at the level of the joint to be welded, a centering mandrel, a sealing plug at the free extremity of said mandrel and an annular sealing joint on the periphery of said primary vacuum chamber, in order to weld automatically the tubes of a heat exchanger on the bottom plates.
Inventors
- 👤 J Peyrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:36
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/301; B; B23; B23K; B23K15/00; B23K15/04; H01J37/02; H01J37/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
138 words
A rotatable portable welding gun for welding a tube extending from a plate at a joint to said plate comprising an electron gun, means to rotate said electron gun connected to said electron gun, a secondary vacuum chamber around said electron gun, a primary vacuum chamber at a level of a joint to be welded having an opening over the tube to be welded, a centering mandrel extending from and aligned with an opening in said primary vacuum chamber, a sealing joint on said mandrel and an annular sealing joint on the periphery of the opening in said primary vacuum chamber, value means connecting said vacuum chambers, said vacuum chambers substantially coaxial with said centering mandrel and located together with said rotating means and said sealing joints on the opposite end of said mandrel from its free end.
Claim 2
Dependent Claim
138 words
A rotatable portable welding gun for welding a tube extending from a plate at a joint to said plate comprising an electron gun, means to rotate said electron gun connected to said electron gun, a secondary vacuum chamber around said electron gun, a primary vacuum chamber at a level of a joint to be welded having an opening over the tube to be welded, a centering mandrel extending from and aligned with an opening in said primary vacuum chamber, a sealing joint on said mandrel and an annular sealing joint on the periphery of the opening in said primary vacuum chamber, value means connecting said vacuum chambers, said vacuum chambers substantially coaxial with said centering mandrel and located together with said rotating means and said sealing joints on the opposite end of said mandrel from its free end.
Claim 3
Dependent Claim
36 words
A welding gun in accordance with claim 1 further characterized by said electron gun being displaced radially with respect to the axis of said mandrel and connected to rotate about the center axis of said mandrel.
Claim 4
Dependent Claim
46 words
A welding gun in accordance with claim 1 further characterized by said value means comprising a flat isolation valve for said secondary vacuum chamber, located between said secondary and primary vacuum chambers, said valve always being in an open position during rotation of said electron gun.
Claim 5
Dependent Claim
54 words
A welding gun in accordance with claim 3 further characterized by said isolation valve including a slide, a jack attached to said slide, means to push against said jack in contact with said jack at least a portion of the time during rotation of said electron gun, spring means to oppose said pushing means.
Claim 6
Dependent Claim
38 words
A welding gun in accordance with claim 4 further characterized by a support means for said slide and said jack having a hole therethrough aligned with the beam of said electron gun to allow passage of said beam.
Claim 7
Dependent Claim
30 words
A welding gun in accordance with claim 7 further characterized by said valve closing said hole only at a determined radial starting position of the rotating of said electron gun.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |