US3714389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of butt welding a tubing to a base metal
Assignee: Denso Corp
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Filing: 1971-02-12
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Granted: 1973-01-30
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Expires: 1991-02-12
Abstract
Abstract A METHOD OF BUTT-WELDING A TUBING TO A METALLIC VESSEL. A TUBING OF A METAL IS AXIALLY PRESSED BY A PAIR OF MOLD MEMBERS HAVING AXIALLY AND RADIALLY CONFINED CAVITY PORTIONS. THE PRESSED TUBING IS CAUSED TO HAVE RADIALLY OUTWARD BUCKLING DEFORMATION WHICH THE CAVITY PORTIONS COOPERATE TO SHAPE INTO A FLANGE. ANOTHER PIECE OF A METAL IS PREPARED AND IS FORMED THEREIN WITH A RECESS. THE THREE MEMBERS ARE ASSEMBLED TOGETHER WITH SAID FLANGE BEING RECEIVED IN SAID RECESS AND SANDWICHED BETWEEN THE TWO OTHER MEMBER. THEREAFTER, BUTT-WELDING IS PERFORMED TO SIMULTANEOUSLY WELD SAID FLANGE TO THE TWO OTHER MEMBERS.
Inventors
- 👤 T Torii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:43
CPC Classifications
B; B23; B23K; B23K33/00; B23K11/00; B23K11/08; B23K11/093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |