US3415977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance welding
Assignee: United States Atomic Energy Commission
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Filing: 1966-09-23
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Granted: 1968-12-10
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Expires: 1986-09-23
Abstract
No abstract record available.
Inventors
- 👤 Stuart A Bush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:09
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/3009
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
THE METHOD OF JOINING TOGETHER OPPOSITELY DISPOSED WALL PORTIONS OF A TUBULAR MEMBER AND EFFECTING A HERMETIC SEAL IN A TUBULAR MEMBER BY RESISTANCE WELDING COMPRISING THE STEPS OF, POSITIONING A TUBULAR MEMBER TO BE WELDED WITH ITS LONGITUDINAL TUBULAR AXIS GENERALLY PARALLEL TO THE FORGING LENGTH OF AND INTERMEDIATE A PAIR OF RESISTANCE WELDING ELECTRODES, APPLYING A FORCE TO AT LEAST ONE OF THE ELECTRODES TO SQUEEZE TOGETHER BETWEEN THEM AND FLATTEN AND AT LEAST PARTIALLY JOIN TOGETHER SAID WALL PORTIONS OF THE TUBULAR MEMBER AND SIMULTANOUSLY WITH SAID SQUEEZING APPLYING AN ELECTRIC CURRENT BETWEEN THE ELECTRODES AND THROUGH SAID TUBULAR MEMBER, ROTATING THE TUBULAR MEMBER SO AS TO POSITION SAID FLATTENED AND FORGED WALL PORTIONS GENERALLY PARALLEL TO AND INTERMEDIATE SAID PAIR OF ELECTRODES WITH THE ELECTRODES SPANNING THE WIDTH OF THE FLATTENED INTERIOR DIAMETER OF SAID TUBULAR MEMBER AT A LOCATION INTERMEDIATE AND SPACED FROM LONGITUDINALLY SPACED ENDS THEREOF, AND APPLYING A FORCE TO AT LEAST ONE OF THE ELECTRODES TO FURTHER SQUEEZE TOGETHER PORTIONS OF OPPOSITELY DISPOSED WALL PORTIONS OF THE PREFLATTENED AREA OF THE TUBULAR MEMBER AND SIMULTANEOUSLY WITH SAID FURTHER SQEEZING APPLYING AN ELECTRIC CURRENT BETWEEN THE ELECTRODES AND THROUGH SAID PORTION OF FLATTENED TUBULAR MEMBER TO EFFECT A HERMETIC WELDED SEAL IN SAID TUBULAR MEMBER.
Claim 2
Independent Claim
212 words
THE METHOD OF JOINING TOGETHER OPPOSITELY DISPOSED WALL PORTIONS OF A TUBULAR MEMBER AND EFFECTING A HERMETIC SEAL IN A TUBULAR MEMBER BY RESISTANCE WELDING COMPRISING THE STEPS OF, POSITIONING A TUBULAR MEMBER TO BE WELDED WITH ITS LONGITUDINAL TUBULAR AXIS GENERALLY PARALLEL TO THE FORGING LENGTH OF AND INTERMEDIATE A PAIR OF RESISTANCE WELDING ELECTRODES, APPLYING A FORCE TO AT LEAST ONE OF THE ELECTRODES TO SQUEEZE TOGETHER BETWEEN THEM AND FLATTEN AND AT LEAST PARTIALLY JOIN TOGETHER SAID WALL PORTIONS OF THE TUBULAR MEMBER AND SIMULTANOUSLY WITH SAID SQUEEZING APPLYING AN ELECTRIC CURRENT BETWEEN THE ELECTRODES AND THROUGH SAID TUBULAR MEMBER, ROTATING THE TUBULAR MEMBER SO AS TO POSITION SAID FLATTENED AND FORGED WALL PORTIONS GENERALLY PARALLEL TO AND INTERMEDIATE SAID PAIR OF ELECTRODES WITH THE ELECTRODES SPANNING THE WIDTH OF THE FLATTENED INTERIOR DIAMETER OF SAID TUBULAR MEMBER AT A LOCATION INTERMEDIATE AND SPACED FROM LONGITUDINALLY SPACED ENDS THEREOF, AND APPLYING A FORCE TO AT LEAST ONE OF THE ELECTRODES TO FURTHER SQUEEZE TOGETHER PORTIONS OF OPPOSITELY DISPOSED WALL PORTIONS OF THE PREFLATTENED AREA OF THE TUBULAR MEMBER AND SIMULTANEOUSLY WITH SAID FURTHER SQEEZING APPLYING AN ELECTRIC CURRENT BETWEEN THE ELECTRODES AND THROUGH SAID PORTION OF FLATTENED TUBULAR MEMBER TO EFFECT A HERMETIC WELDED SEAL IN SAID TUBULAR MEMBER.
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) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |