Apparatus for forming a socket-shaped end on plastic pipes
Abstract
Abstract AN APPARATUS FOR FORMING A SOCKET ON THE END OF A PLASTIC PIPE COMPRISING A MOLD FORMED BY A HOLLOW OUTER MEMBER AND A CORE POSITIONED WITHIN AND SPACED FROM THE OUTER MEMBER. THE OUTER MEMBER IS FORMED BY TWO SEPARATE SECTIONS MOVABLE RADIALLY WITH RELATIVE TO ONE ANOTHER. THE CORE IS COMPRISED OF TWO PAIRS OF SEPARATE SEGMENTS. ONE PAIR OF THE SEGMENTS IS RETRACTABLE AXIALLY INTO A HOLLOW TUBULAR MANDREL. SITUATED WITHIN THE MANDREL IS AN AXIALLY MOVABLE NOSE KEY FOR POSITIONING THE SEGMENTS IN THE CORE. A HOLDING MEMBER FEEDS THE PIPE UNDER PRESSURE INTO THE SPACE IN THE MOLD BETWEEN THE CORE AND THE OUTER MEMBER FOR FORMING THE SOCKET AND AT THE SAME TIME INCREASING THE PIPE WALL THICKNESS OF SOCKET.
Inventors
- 👤 Karl Heinrich Kuhlemann
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |