| 摘要 |
<p>A pipe coupling, comprising a sleeve portion (1) having at least one end adapted for the insertion of a pipe (10), said end being provided with a substantially conically shaped supporting surface (3) for a sealing ring (4), and with a pressure ring (5), by means of which - in corporation with the supporting surface (3) - the sealing ring (4) may be compressed around a pipe (10) inserted into the sleeve portion (1), said sealing ring (4) being composed of a circumferentially compressible but in cross section rather undeformable annular core (8), which is more particularly bent of a helical body having substantially circular windings, and a sheath (9) of elastomeric material which forms the proper sealing ring (4) and completely encloses said annular core (8) both cross sectionally and circumferentially. According to the present invention the supporting surface (3) has a progressively decreasing diameter as seen in the pressing direction.</p> |
