Patent US3234352A successfully refreshed from Google Patents.
US3234352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding of metal edge portions
Assignee: AMF Inc
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Filing: 1963-07-23
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Granted: 1966-02-08
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Expires: 1983-07-23
Abstract
No abstract record available.
Inventors
- 👤 Morris Jack
- 👤 Wallace C Rudd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:22
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/04; B23K13/043; B23K13/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
METHOD OF WELDING TOGETHER TWO ELONGATED SHEET METAL PORTIONS WITH A LONGITUDINALLY EXTENDING LAPPED SEAM, COMPRISING: LONGITUDINALLY ADVANCING THE PORTIONS WITH THE EDGE PORTIONS WHICH ARE TO BE LAP WELDED TOGETHER IN OVERLYING SPACED RELATIONSHIP, BRINGING SAID EDGE PORTIONS GRADUALLY INTO SUPERPOSED CONTACT WITH EACH OTHER ALONG NARROW LAPPED SURFACES AT A WELD POINT, HEATING SAID LAPPED SURFACES IN ADVANCE OF SAID WELD POINT BY PASSING SAME THROUGH AN ELECTRICAL HEATING ZONE AND SUBJECTING SAME TO FLOWS OF HIGH-FREQUENCY ELECTRICAL CURRENT TO HEAT SAME TO WELDING TEMPERATURE AT SAID WELD POINT, CHARACTERIZED BY PROVIDING ELEMENTS AGAINST THE NON-CONTIGUOUS SURFACES OF SAID LAPPED METAL PORTIONS AT OR NEARLY ADJACENT THE WELD POINT FOR APPLYING SUFFICIENT PRESSURE THERETO TO SUBSTANTIALLY COMPRESS SUCH LAPPED PORTIONS AS SAID PORTIONS ARE ADVANCED PAST SAID WELD POINT WHILE HEATING THE SURFACE OF AT LEAST ONE OF SAID ELEMENTS SUFFICIENT TO AVOID CHILLING OF SAID LAPPED PORTIONS.
Claim 2
Dependent Claim
150 words
METHOD OF WELDING TOGETHER TWO ELONGATED SHEET METAL PORTIONS WITH A LONGITUDINALLY EXTENDING LAPPED SEAM, COMPRISING: LONGITUDINALLY ADVANCING THE PORTIONS WITH THE EDGE PORTIONS WHICH ARE TO BE LAP WELDED TOGETHER IN OVERLYING SPACED RELATIONSHIP, BRINGING SAID EDGE PORTIONS GRADUALLY INTO SUPERPOSED CONTACT WITH EACH OTHER ALONG NARROW LAPPED SURFACES AT A WELD POINT, HEATING SAID LAPPED SURFACES IN ADVANCE OF SAID WELD POINT BY PASSING SAME THROUGH AN ELECTRICAL HEATING ZONE AND SUBJECTING SAME TO FLOWS OF HIGH-FREQUENCY ELECTRICAL CURRENT TO HEAT SAME TO WELDING TEMPERATURE AT SAID WELD POINT, CHARACTERIZED BY PROVIDING ELEMENTS AGAINST THE NON-CONTIGUOUS SURFACES OF SAID LAPPED METAL PORTIONS AT OR NEARLY ADJACENT THE WELD POINT FOR APPLYING SUFFICIENT PRESSURE THERETO TO SUBSTANTIALLY COMPRESS SUCH LAPPED PORTIONS AS SAID PORTIONS ARE ADVANCED PAST SAID WELD POINT WHILE HEATING THE SURFACE OF AT LEAST ONE OF SAID ELEMENTS SUFFICIENT TO AVOID CHILLING OF SAID LAPPED PORTIONS.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |