US3561248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming curved metal bars as automobile bumpers
Assignee: KAWASAKI JUKO KK
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Filing: 1968-05-21
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Granted: 1971-02-09
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Expires: 1988-05-21
Abstract
Abstract FORMING APPARATUS EMPLOYING A PAIR OF ROCKABLE FEMALE DIE MEMBERS AND A SPLIT TYPE MALE DIE ASSEMBLY INCLUDING A PAIR OF SIDE DIE MEMBERS. THE FEMAL DIE MEMBERS SERVE TO ROLL-BEND THE OPPOSITE END PORTIONS OF THE BLANK IN COOPERATION WITH THE SIDE MEMBERS OF THE MALE DIE AS A LATTER IS FORCED TO RISE. SUBSEQUENTLY, UPON EXPANSION OF THE MALE DIE ASSEMBLY, THE INTERMEDIATE PORTION OF THE BLANK WITH ITS END PORTIONS CLAMPED AGAINST THE SIDE MALE DIE MEMBERS IS EFFICIENTLY STRETCH-FORMED ALONG THE CONTOURED SURFACE OF THE MALE IS ASSEMBLY THROUGH PLASTIC DEFORMATION OF THE MATERIAL.
Inventors
- 👤 Michio Bessho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:25
CPC Classifications
B; B21; B21D; B21D7/00; B21D7/02; B21D7/024; B21D7/028
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |