| 摘要 |
<p>PCT No. PCT/FI93/00147 Sec. 371 Date Sep. 9, 1994 Sec. 102(e) Date Sep. 9, 1994 PCT Filed Apr. 6, 1993 PCT Pub. No. WO93/20381 PCT Pub. Date Oct. 14, 1993.A relining pipe for insertion inside sewer lines to repair them. The relining pipe is made up of a number of substantially rigid pipe elements (1), which are interconnected by pipe couplings, the pipe coupling including a female sleeve part (2) and a male locking part (3), at least one of these having a circumferential shoulder surface and the other having a stop surface pressing against the shoulder surface when the pipe elements are pressed against each other, and in the female part and the male part counterparts (5, 16) which snap-lock to each other in order to prevent the pipe elements from becoming detached from each other. The pipe element (1) has, as an extension of the male part (3) towards the female part (2), a shoulder ring (6) which is integral with the element and the outer diameter (D3) of which is approximately the same as the outer diameter (D2) of the female part. This shoulder ring has a shoulder surface (7) against which the stop surface of the outer edge of the female part (2) presses when the pipes are pressed together.</p> |
