| 摘要 |
1 - Pipe coupling including a pipe connection provided with external (144) and/or internal (154) threade and intended to receive a coupling member equipped with complemental internal and/or external threads, the pipe connection and/or the coupling member being provided in the area of the threads with a reccess (145) for a cylindrical surface, fitting the recess and formed with an optional type of thread, the threaded cylndrical surface being pierced by one or more slits (146) extending substantially axially and dividing the cylindrical surface into one or more arcuate surfaces, and wherein the recess is provided with a radially projecting abutment (147) fitting in grooves (148) in the cylindrical surfaces for preventing or restricting peripherial rotation of these surfaces, the recess alternatively being provided with a slot in which there fits a radially projecting abutment on the cylindrical surface. 2 - Coupling as claimed in Claim 1 C, characterized in that cylindrical surface is divided into two or more arcuate surfaces kept together by elastic or resilent material (156), for enabling a diameter increase or decrease of the cylindrical surface when it is inserted in the recess on the connection and/or the coupling member. |
