| 摘要 |
A sealing ring (10) for sealing an annular gap between a concrete pipe socket (44) and a concrete pipe spigot end (48) comprises a radially outer holding portion (14) for connecting the sealing ring (10) in the concrete, a radially inner sealing portion (16) comprising a sealing layer (18) for contacting the spigot end (48) and an axially outer inserting portion (20). A plurality of cavities (26, 28, 30) being separated by ribs (32, 34) is provided in the sealing ring (10). The sealing ring (10) is formed of at least a first material and a second material, the first material having a lower hardness than the second material. The sealing portion (10) and the ribs (32, 34) are made of the first material and said holding portion (14) is made of said second material. |
