A fitting for a liner pipe formed of polyethylene
Abstract
Abstract A fitting for a liner pipe formed of plastic material such as polyethylene, the fitting having an enlarged shoulder, a boss, and a stud with circumferentially extending spaced-apart steps or ribs insertable in the end of the liner pipe. The shoulder is circumferentially beveled at one edge. A pliable compression ring is forced and compressed against the adjacent walls of a pipe within which the liner pipe is arranged and the fitting, to provide an effective seal and connection between the fitting and the pipe. The liner pipe is inserted upon the stud within a sleeve press-fitted on the boss, the sleeve and liner pipe being crimped to engage between the steps to provide connection between the liner pipe and the stud.
Inventors
- 👤 Sol S Eliot
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |