| 摘要 |
<p>The end of a thermoplastic pipe (2) is heated and = expanded by a spigot to a diameter big enough to accept an insert (6), = which is held in place by then compressing the pipe to form a groove = shape (5). The removable sealing ring (4) is carried in a ring groove in = the insert (6). Sealing material (7) is placed between the pipe and the = insert and the joint can be assisted by adhesive and a clamping ring = (8). Independent claims are included for the = following: (1) An ring-shaped insert (6) for a recess formed in a pipe = end into which a sealing ring (4) can be subsequently placed; (2) A pipe = sleeve with a recess for an insert which carries a removable sealing = ring. The section of the insert can be a segment of a sphere, = trapeze-shaped, or rectangular and triangular. It can be in one piece or = made up several sections.</p> |
