Connecting sleeve
Abstract
Abstract A CONNECTING SLEEVE, PARTICULARLY FOR GLASS FIBER REINFORCED PIPES OF SYNTHETIC MATERIAL, WHICH COMPRISES PIPES TO BE CONNECTED HAVING AN OUTER FACE, AND A SLEEVE DEFINING AN INNER WALL. THE OUTER FACE, OF THE PIPE AND THE INNER WALL HAVE OPPOSITELY DISPOSED GROOVES, THE LATTER DEFINING JOINTLY AN ANNULAR SPACE HAVING AN OUTWARDLY LEADING BORE FOR FILLING THE ANNULAR SPACE WITH A HARDENING CAST MASS. THE OUTER FACE OF THE PIPE AND THE INNER WALL HAVE AN ADDITIONAL PAIR OF GROOVES. A RESILIENT RING IS RECEIVED IN THE ADDITIONAL PAIR OF GROOVES. MEANS FOR SECURING THE ENDS OF THE PIPES AGAINST ROTARY AND AXIAL DISPLACEMENT ARE ARRANGED AND A TENSION CAGE SURROUNDS THE SLEEVE. AT THE ENDS OF THE PIPES THE GROOVES CROSS THE ENGAGING FACE OF THE SLEEVE AND THE PIPE WITH CONICAL FACES ALONG A COMMON LINE.
Inventors
- 👤 Walter Schwarz
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |