Patent US3553992A successfully refreshed from Google Patents.
US3553992A
Expired / Lapsed
US
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System for automatically decelerating rolling mills
Assignee: Pittsburgh National Bank
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Filing: 1968-04-24
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Granted: 1971-01-12
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Expires: 1988-04-24
Abstract
Abstract DESCRIBED IS A SYSTEM FOR AUTOMATICALLY DECELERATING A ROLLING MILL FROM A HIGH SPEED TO A PRESET LOW SPEED SUCH THAT THE END OF A COIL BEING ROLLED APPROACHES THE BITE OF THE ROLLING MILL ROLLS WHEN THE PRESET LOW SPEED IS REACHED. AT THE SAME TIME, THE ROLLING MILL SCREWS ARE AUTOMATICALLY RAISED WHEN THE STRIP SPEED APPROACHES PRESET LOW SPEED TO PERMIT THE TRAILING END OF THE COIL TO PASS THROUGH THE MILL.
Inventors
- 👤 Samuel S Harbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:58
CPC Classifications
B; B21; B21B; B21B37/00; B21B37/46
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |