Patent US3566638A successfully refreshed from Google Patents.
US3566638A
Expired / Lapsed
US
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Screwdown system for a rolling mill
Assignee: JONES & LAMSON WATERBURY FARREL CORP A CORP OF DE
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Filing: 1968-05-29
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Granted: 1971-03-02
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Expires: 1988-05-29
Abstract
Abstract A HYDRAULIC SCREWDOWN SYSTEM FOR A ROLLING MILL. IN PARTICULAR, THERE IS PROVIDED A DOUBLE-ACTING HYDRAULIC CYLINDER HAVING ITS PISTON POSITION TO EFFECT MILL ADJUSTMENT IN ACCORDANCE WITH A CONTROL SIGNAL. IN ONE EMBODIMENT A DISPLACEMENT TRANSDUCER IS UTILIZED TO GENERATE THE CONTROL SIGNAL AND IN ANOTHER OF THE EMBODIMENTS, A PRESSURE TRANSDUCER IS UTILIZED IN GENERATING CONTROL SIGNALS.
Inventors
- 👤 Robert Herbst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:37
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/16; B21B31/20; B21B31/32; B21B37/00; B21B37/58; B21B37/62
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |