Patent US3620066A successfully refreshed from Google Patents.
US3620066A
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US
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Metal bending method and machine therefor
Assignee: Individual
•
Filing: 1969-06-25
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Granted: 1971-11-16
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Expires: 1989-06-25
Abstract
Abstract A METHOD OF BENDING METAL WHICH CONSISTS IN APPLYING PRESSURE TO THE AREA WHERE BENDING IS TO BE EFFECTED, THE FORCE OF THE PRESSURE HAVING A VALUE WHICH APPROXIMATES THAT AT WHICH THE BENDING OCCURS, THE METHOD ALSO INCLUDING AUGEMENTING SUCH PRESSURE, PREFERABLY MANUAL, TO EFFECT THE ULTIMATE DEGREE OF BENDING OF THE METAL, SUCH METHOD BEING PERFORMED BY A MACHINE INCLUDING A DEVICE FOR APPLYING PRESSURE, PREFERABLY A HYDRAULIC DEVICE, AND ANOTHER DEVICE, PREFERABLY MANUALLY POWERED, FOR AURGMENTING THE FORCE OF THE FIRST MENTIONED DEVICE, BUT AT A LESSER PRESSURE VALUE.
Inventors
- 👤 Neville T Henkel
- 👤 Harry Wright
- 👤 Herman W Scharer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:35
CPC Classifications
B; B21; B21D; B21D3/00; B21D3/10; B21D7/00; B21D7/06; Y; Y10; Y10S; Y10S72/00; Y10S72/702
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |