US3275786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed butt welding method and apparatus
Assignee: Airco Inc
•
Filing: 1965-01-15
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Granted: 1966-09-27
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Expires: 1985-01-15
Abstract
No abstract record available.
Inventors
- 👤 Everett H Cushman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:29
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/06; B23K9/073; B23K9/0737; B23K9/02; B23K9/025; B23K9/0253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THE METHOD OF ELECTRIC ARC FUSION WELDING OF A SUBSTANTIALLY STRAIGHT SEAM IN NON-MAGNETIC MATERIAL, USING A SUBSTANTIALLY NON-CONSUMING ARC ELECTRODE RELATIVELY PROGRESSIVELY MOVED ALONG THE SEAM TO BE WELDED, WHICH METHOD COMPRISES THE STEPS OF (A) APPLYING MAGNETIC FORCES IN THE ARC ZONE TO SHAPE THE ARC FLAME INTO A FORM ELONGATED ALONG A GIVEN LONG AXIS AND CONSTRICTED IN THE DIRECTION PERPENDICULAR TO SAID AXIS, (B) SHIELDING THE ARC ZONE FROM THE AMBIENT ATMOSPHERE WITH INERT SHIELDING GAS TO WHICH HAS BEEN ADDED 5 TO 30 PERCENT OF HYDROGEN, (C) APPLYING THE THUS SHAPED AND SHIELDED ARC TO THE SEAM WITH THE ARC FLAME ALIGNED WITH ITS LONG AXIS ALONG THE LINE OF THE SEAM, AND (D) APPLYING ELECTRIC POWER TO THE ARC AT A RATE SUITABLE TO SECURE COMPLETE PENETRATION OF THE WELD THROUGH THE WORK.
Claim 2
Independent Claim
139 words
THE METHOD OF ELECTRIC ARC FUSION WELDING OF A SUBSTANTIALLY STRAIGHT SEAM IN NON-MAGNETIC MATERIAL, USING A SUBSTANTIALLY NON-CONSUMING ARC ELECTRODE RELATIVELY PROGRESSIVELY MOVED ALONG THE SEAM TO BE WELDED, WHICH METHOD COMPRISES THE STEPS OF (A) APPLYING MAGNETIC FORCES IN THE ARC ZONE TO SHAPE THE ARC FLAME INTO A FORM ELONGATED ALONG A GIVEN LONG AXIS AND CONSTRICTED IN THE DIRECTION PERPENDICULAR TO SAID AXIS, (B) SHIELDING THE ARC ZONE FROM THE AMBIENT ATMOSPHERE WITH INERT SHIELDING GAS TO WHICH HAS BEEN ADDED 5 TO 30 PERCENT OF HYDROGEN, (C) APPLYING THE THUS SHAPED AND SHIELDED ARC TO THE SEAM WITH THE ARC FLAME ALIGNED WITH ITS LONG AXIS ALONG THE LINE OF THE SEAM, AND (D) APPLYING ELECTRIC POWER TO THE ARC AT A RATE SUITABLE TO SECURE COMPLETE PENETRATION OF THE WELD THROUGH THE WORK.
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |