Patent US2558760A successfully refreshed from Google Patents.
US3235705A
Expired / Lapsed
US
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Vertical welding
Assignee: Airco Inc
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Filing: 1963-07-19
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Granted: 1966-02-15
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Expires: 1983-07-19
Abstract
No abstract record available.
Inventors
- 👤 Stanley A Agnew
- 👤 Frank G Ferraioli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:25
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/038; B23K9/0209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD OF UPWARD VERTICAL ELECTRIC ARC WELDING STELL WITH A BARE SOLID WIRE CONSUMABLE ELECTRODE CONNECTED TO A SOURCE OF WELDING CURRENT WHEREIN AN ARC IS MAINTAINED BETWEEN SAID ELECTRODE AND A WELD POOL IN A RELATIVELY NARROW GAP BETWEEN THE VERTICALLY ORIENTED SPACED EDGES OF TWO WORKPIECES CONNECTED TO SAID SOURCE, CHARACTERIZED BY FEEDING A MIXTURE OF SUBSTANTIALLY PURE ARGON PLUS 12 TO 27 PERCENT OF CARBON DIOXIDE BY VOLUME TO SHIELD THE ARC, AND RESTRICTING THE ARC LENGTH TO SUCH AN EXTENT THAT IN THE PRESENCE OF THE SAID SHIELDING GAS MIXTURE THE SPREAD OF THE ARC AT THE SURFACE OF THE WELD POOL IS SUCH AS TO ENABLE FORMING AND MAINTAINING A MOLTEN WELD POOL IN THE NARROW GAP BETWEEN SAID WORKPIECES.
Claim 2
Dependent Claim
81 words
IN VERTICAL WELDING APPARATUS FOR WELDING OPEN SEAMS BETWEEN ADJACENT GENERALLY VERTICAL EDGES OF WORKPIECES: THE COMBINATION OF A TRACKLESS WELDING HEAD, AND FLEXIBLE LIFT LINES DISPOSED ONE OT EACH SIDE OF THE WORKPIECES FOR MOVING SAID HEAD; SAID HEAD WHEN IN WORKING POSITION BEING DISPOSED WITH A PORTION EXTENDING THROUGH THE OPEN SEAM AND HAVING PORTIONS ON EACH OF THE OPPOSITE SIDES OF THE WORKPIECES, SAID LIFT LINES BEING CONNECTED TO SAID WELDING HEAD ON OPPOSITE SIDES OF THE WORKPIECES.
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |