Pipe lining apparatus
Abstract
Abstract WARDLY OF THE SPRAY WHEREBY THE HEAD IS MAINTAINED IN A COAXIAL POSITION RELATIVE TO THE PIPE AS IT IS DRAWN THROUGH THE LATTER. DISCLOSED IS A MOTOR DRIVEN DRUM FOR DRAWING A SUPPLY HOSE AND AN APPLICATOR HEAD THROUGH A PIPE. THE HOSE COMMUNICATES THROUGH THE DRUM WITH A RESERVOIR CONTAINING COATING MATERIAL AND SUPPLIES THE LATTER TO THE APPLICATOR HEAD FOR COATING THE WALL OF A PIPE. THE APPLICATOR HEAD HAS A PLURALITY OF NOZZLES MOUNTED FOR ROTATION UNDER CENTRIFUGAL FORCE TO PROVIDE A CONICAL SPRAY FOR APPLYING THE COATING TO THE WALL AS THE HEAD IS DRAWN THROUGH THE PIPE. A PLURALITY OF CENTERING VANES ARE CARRIED AT CIRCUMFERENTIALLY SPACED POSITIONS ABOUT THE HEAD AND ARE SPRING BIASED TO ENGAGE THE INNER WALL FOR-
Inventors
- 👤 Milton P Huff
- 👤 Sidney J Sullivan Jr
- 👤 Wayne E Bailey
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |