Shrunk fit tube coupling
Abstract
Abstract A UNION BETWEEN A FITTING AND A CONVOLUTED PLASTICS HOSE COMPRISING AN IRRADIATED SHRINK-DOWN MATERIAL FOR THE FITTING AND A HOLLOW RIGID CYLINDRICAL FERRULE OF NYLON OR ALUMINIUM ALLOY WITHIN A SMOOTH NON-CONVOLUTED END OF THE HOSE WHEREBY THE FERRULE RESTRAINS DEFORMATION OF THE HOSE END WHEN THE FITTING IS SHRUNKEN OVER IT. THE CONVOLUTIONS ARE REMOVED FROM THE HOSE END AND THE END IS FORMED WITH AN EXTERNAL DIAMETER EQUAL TO THE EXTERNAL DIAMETER OF THE CONVOLUTIONS BY STRETCHING THE END OF THE HOSE OVER A HEATED MANDREL AND APPLYING A TOOL TO THE HOSE END EXTERIOR SURFACE. THE FITTING IN ITS PRE-FORMED EXPANDED STATE AND THE HOSE MAY BE SO POSITIONED WITH RESPECT TO ONE ANOTHER THAT AFTER SHRINKING AN END EDGE OF THE FITTING LIES IN THE SPACE BETWEEN TWO NEIGHBOURING CONVOLUTIONS. AN EPOXY RESIN ADHESIVE LAYER MAY BE PROVIDED BETWEEN THE FERRULE AND THE SMOOTH INTERIOR SURFACE OF THE HOSE END, OR BETWEEN THE FITTING AND THE SMOOTH EXTERIOR SURFACE OF THE HOSE END, OR BOTH.
Inventors
- 👤 Brian Benson
- 👤 Ian Martin Cleare
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) | 1974-03-01 | 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 |