Bulging apparatus
Abstract
Abstract AN APPARATUS FOR RADIALLY BULGING A TUBULAR MATERIAL BY GIVING AXIS PRESSURE FROM BOTH ENDS OF THE TUBULAR MATERIAL BY MEANS OF A PAIR OF ANNULAR MEMBERS WHICH ARE SLIDABLY MOUNTED IN A CYLINDRIDAL MEMBER OF WHICH ONE END IS OPENED THROUGH WHICH A PRESSURE FLUID IS FED INTO THE BORE OF THE TUBULAR MATERIAL. WHEN THE PRESSURE FLUID IS PUMPED INTO THE BORE OF THE TUBULAR MATERIAL, THE PRESSURE CAUSES THE TUBE TO BULGE AND THE ANNULAR MEMBERS TO MOVE AXIALLY TOWARD EACH OTHER. THUS A SINGLE SOURCE OF PRESSURE WORKS TO BULGE THE TUBULAR MATERAL AS WELL AS TO REDUCE THE LENGTH OF THE TUBE. BY PROVIDING AN ADDITIONAL ANNULAR MEMBER OR MEMBERS, A PLURALITY OF BULGES MAY BE FORMED ON THE TUBULAR MATERIAL.
Inventors
- 👤 Masanobu Nakamura
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |