Expandable seal for a controlled deflection roll
Abstract
Abstract A CONTROLLED DEFLECTION ROLL HAS A NON-ROTATIVE SHAFT AND A SURPERIMPOSED ROLL SHELL WITH SPACE BETWEEN THE TWO, END AND LONGITUDINALLY EXTENDING SEALS DIVIDING THIS SPACE INTO TWO COMPARTMENTS INTO ONE OF WHICH LIQUID IS INTRODUCED UNDER PRESSURE SO THAT WHEN THE ROLL SHELL IS WORKING AGAINST A COUNTER ROLL UNDER PRESSURE THE DEFLECTION OF THE ROLL SHELL IS CONTROLLED BY THE PRESSURE ON THE LIQUID WITH CONSEQUENT OPPOSITE BEAM FLEXURE OF THE SHAFT. AT LEAST THE LONGITUDINALLY EXTENDING SEALS ARE HOLLOW AND INFLATABLE AND ARE EXPANDABLE BY FLUID PRESSURE CONTROLLED TO PROVIDE THE SEALING PRESSURE DESIRED INDEPENDENTLY OF THE PRESSURE OF THE LIQUID CONTROLLING THE DEFLECTION OF THE ROLL SHELL.
Inventors
- 👤 Peter Hold
- 👤 Dominic A D Amato
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |