Patent US3130294A successfully refreshed from Google Patents.
US3130294A
Expired / Lapsed
US
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Method for pre-heating a joint to be arc-welded
Assignee: Air Liquide SA
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Filing: 1960-11-25
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Granted: 1964-04-21
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Expires: 1980-11-25
Abstract
No abstract record available.
Inventors
- 👤 Regnauld Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:29
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/235
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A METHOD FOR PRE-HEATING A METAL JOINT WHICH IS TO BE ARC-WELDED, WHICH COMPRISES SUBJECTING THE EDGES OF SAID JOINT TO AT LEAST ONE INERT-GAS SHIELDED AUXILIARY ARC OF THE NON-CONSUMABLE ELECTRODE TYPE, PLACING SAID AUXILIARY ARC LESS THAN 10 CENTIMETERS AHEAD OF THE MAIN WELDING ARC AND STABILIZING SAID AUXILIARY ARC TO AN EXTENT SUFFICIENT FOR PERMITTING SUBSTANTIALLY UNIFORM AND CONTROLLABLE HEAT INPUT FROM SAID AUXILIARY ARC TO DEFINITE AREAS OF BOTH EDGES OF SAID JOINT.
Claim 2
Independent Claim
77 words
A METHOD FOR PRE-HEATING A METAL JOINT WHICH IS TO BE ARC-WELDED, WHICH COMPRISES SUBJECTING THE EDGES OF SAID JOINT TO AT LEAST ONE INERT-GAS SHIELDED AUXILIARY ARC OF THE NON-CONSUMABLE ELECTRODE TYPE, PLACING SAID AUXILIARY ARC LESS THAN 10 CENTIMETERS AHEAD OF THE MAIN WELDING ARC AND STABILIZING SAID AUXILIARY ARC TO AN EXTENT SUFFICIENT FOR PERMITTING SUBSTANTIALLY UNIFORM AND CONTROLLABLE HEAT INPUT FROM SAID AUXILIARY ARC TO DEFINITE AREAS OF BOTH EDGES OF SAID JOINT.
References Cited (Backward Citations)
US2743342A
Cited
US2756311A
Cited
US2907864A
Cited
US2806124A
Cited
US2858411A
Cited
US2905805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |