Device for the continuous prebending, particularly, of hot-rolled pipes
Abstract
Abstract A DEVICE FOR THE CONTINUOUS PREBENDING, PARTICULARLY, OF HOT-ROLLED PIPES WHICH ARE TO BE WOUND ON A SUBSEQUENT DEVICE, INCLUDES A MULTI-ROLL SYSTEM HAVING A COMMON DRIVE WHICH IS COUPLED WITH THE SUPPORTING FRAME OF THE DEVICE. THE SUPPORTING FRAME MOUNTS A MAGAZINE CONTAINING A PLURALITY OF BENDING AND CALIBRATING ROLLS ARRANGED IN PAIRS FOR BENDING A PIPE PASSED THEREBETWEEN. THE MAGAZINE IS SLIDABLY MOUNTED ON THE FRAME SO IT MAY BE SHIFTED ALONG THE FRAME. ONE COOPERATING PAIR OF A CALIBRATING ROLLER AND A BENDING ROLLER IS MOUNTED ON A MOVABLE HOLDER OF THE MAGAZINE. THE HOLDER IS PIVOTALLY MOUNTED THAT IT WILL BE SHIFTED TO VARY THE BENDING CURVE RADIUS OF OPERATION OF THE ROLLERS IN ACCORDANCE WITH THE SHIFTING MOVEMENT OF THE MAGAZINE ON THE FRAME. TO ACCOMPLISH THIS, THE HOLDER IS CONNECTED TO A LEVER HAVING A ROLLER WHICH IS CONFINED IN A SLOT DEFINED ON THE FRAME.
Inventors
- 👤 Gerhard Steck
- 👤 Hans-Dieter Weitermann
Bibliographic Details
Claims Analysis
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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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |