Patent US3200235A successfully refreshed from Google Patents.
US3200235A
Expired / Lapsed
US
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Heavy duty spot welding apparatus and method
Assignee: AO Smith Corp
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Filing: 1963-06-19
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Granted: 1965-08-10
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Expires: 1983-06-19
Abstract
No abstract record available.
Inventors
- 👤 William A Faust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:11
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN HEAVY DUTY SPOT WELDING APPARATUS ADAPTED TO ESTABLISH A BURN-THROUGH SPOT WELD IN A PAIR OF OVERLAPPED HEAVY GAUGE PLATES, COMPRISING, (A) MEANS TO SUPPORT AN ELECTRODE IN ALIGNMENT WITH THE POSITIONN TO BE SPOT WELDED FOR A SELECTED TIME PERIOD, (B) MEANS ESTABLISHING A SHIELDING GAS PASSAGEWAY ABOUT SAID ELECTRODE FOR DIRECTING A SHIELDING GAS CONCENTRICALLY AND AXIALLY ABOUT THE ELECTRODE, AND (C) A NOZZLE ENCIRCLING THE ARC TIP PORTION OF THE ELECTRODE AND BEING SPACED FROM THE WORK A PREDETERMINED DISTANCE TO ALLOW RELATIVELY UNIMPEDED GAS FLOW FROM THE ARC, SAID GAS FLOW BEING SELECTED TO PREVENT DAMAGING CONCENTRATION OF HEAT WITHIN THE SPOT WELD REGION.
Claim 2
Dependent Claim
109 words
IN HEAVY DUTY SPOT WELDING APPARATUS ADAPTED TO ESTABLISH A BURN-THROUGH SPOT WELD IN A PAIR OF OVERLAPPED HEAVY GAUGE PLATES, COMPRISING, (A) MEANS TO SUPPORT AN ELECTRODE IN ALIGNMENT WITH THE POSITIONN TO BE SPOT WELDED FOR A SELECTED TIME PERIOD, (B) MEANS ESTABLISHING A SHIELDING GAS PASSAGEWAY ABOUT SAID ELECTRODE FOR DIRECTING A SHIELDING GAS CONCENTRICALLY AND AXIALLY ABOUT THE ELECTRODE, AND (C) A NOZZLE ENCIRCLING THE ARC TIP PORTION OF THE ELECTRODE AND BEING SPACED FROM THE WORK A PREDETERMINED DISTANCE TO ALLOW RELATIVELY UNIMPEDED GAS FLOW FROM THE ARC, SAID GAS FLOW BEING SELECTED TO PREVENT DAMAGING CONCENTRATION OF HEAT WITHIN THE SPOT WELD REGION.
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |