| 摘要 |
A lateral pipe adaptor (20) of the type in which a seal ring (27) is axially compressed between a flange (22) on a sleeve (21) and a movable member (25) urged by screws (33) projecting from an abutment member (31) abutting a shoulder (30) on the sleeve (21), to cause the seal ring (27) to expand radially into sealing engagement with a hole (38) in a main pipe (23), especially a structured wall plastics pipe, is characterized by a plurality of abutment rings (34) for selective interposition between the movable member (25) and the abutment member (31), and by a plurality of spacer rings (35) for selective interposition between the seal ring (27) and the movable member (25), whereby the adaptor is adaptable to a wider range of main pipe thicknesses than the known type, and also a wider range of pipe materials, such as clay and concrete or solid plastics. |
