| 摘要 |
<p>Leaktight end sealing plug for a prefabricated conduit member (1) having conducting bars (3, 4, 5, 6) housed in recesses which are leaktight except at the ends of the conduit, from the sides of which there project a pair of retracting locking teeth (10) to permanently lock the plug, comprising: a pair of shells (13, 14) of plastics material leaktightly joined together and forming an enclosure with an open mouth, a seal (21) housed in the enclosure, close to the mouth, for leaktight connection with the end of the conduit member inserted therein, means (35, 36) in the enclosure for permanent engagement of the end of the conduit with teeth (10) and disengaging means (37, 38, 39) to act on the exterior of the enclosure onto the locking teeth (10) and cause them to disengage.</p> |
