Seal for telescopic pipes used in shaft systems in civil engineering is annular and has inner and outer walls linked by transverse strip, all made from more rigid material than flexible sealing profiles inserted on inner sides of walls

摘要

The seal (5) for two telescopic pipe sections (1, 2) is annular and has an inner (7) and outer (6) walls linked by a transverse strip (8). All of these are made from a more rigid material than flexible sealing profiles (11, 17) inserted on the inner sides of the walls.