| 摘要 |
A pipe coupling comprises a cylindrical coupling member fabricated of shape memory alloy and a foil as a metallic member of low melting point attached to an internal surface of the cylindrical coupling member, a melting point of the foil being lower than that of materials of a pipe to be joined to the pipe coupling and of the coupling member. Further, a pipe coupling comprises a cylindrical coupling member fabricated of shape memory alloy, at least two pieces of ring protrusions formed on an internal surface of the cylindrical coupling member, and metallic member of low melting point which is attached to an internal surface of the cylindrical coupling member between the ring protrusions, a melting point of the metallic member of low melting point being lower than that of materials of a pipe to be joined and of the coupling member. Furthermore, a pipe coupling comprises a cylindrical coupling member fabricated of shape memory alloy, a ring stopper formed at a central portion of the cylindrical coupling member in the axial direction thereof, and metallic member of low melting point attached to an internal surface of the cylindrical coupling member both sides of the ring stopper, a melting point of the metallic member of low melting point being lower than that of materials of a pipe to be joined and of the coupling member.
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