US3609854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of friction welding
Assignee: National Institute for Materials Science
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Filing: 1968-07-30
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Granted: 1971-10-05
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Expires: 1988-07-30
Abstract
Abstract THE DISCLOSURE PROVIDES A METHOD OF AND AN APPARATUS FOR FRICTION WELDING WORKPIECES IN WHICH A FIRST WORKPIECE IS SECURED TO A FIRST DRIVE SHAFT AND A SECOND WORKPIECE IS SECURED TO A SECOND FREELY ROTATABLE SHAFT, THE FIRST DRIVE SHAFT IS ROTATED AT A CONSTANT SPEED, THE FREE END OF THE SECOND WORKPIECE IS CONTACTED TO THE FREE END OF THE FIRST WORKPIECE BY THE AXIAL FORCE SO AS TO FREELY ROTATE THE SECOND WORKPIECE AND ACCELERATE THE ROTATION OF THE SECOND WORKPIECE TO REACH THE ROTATIONAL SPEED OF THE FIRST WORKPIECE, AND DURING WHICH PERIOD A WELD IS COMPLETED, AND SIMULTANEOUSLY, FLASH FORMING AT THE JOINT OF WORKPIECES DURING FRICTION WELDING CAN BE REMOVED.
Inventors
- 👤 Atsushi Hasui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:13
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/12; B29; B29C; B29C37/00; B29C37/02; B29C37/04; B29L; B29L2023/00; B29L2023/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |