IMPROVEMENTS IN AND RELATING TO PIPE CONNECTORS

摘要

The pipe conector comprises a male member which has an external frusto-conical surface provided with a thread and a female member having an internal frusto-conical surface provided with a thread. The member are provided with sealing surfaces which are brough into sealing abutment under an axially directed compressive force. The pitch of the thread is varied along the axial length. The surfaces are divided into three portions, an intermediate portion in which the pitches of the threads of the members are the same, and end portions in which the pitches differ. In the end portions closest to the sealing surfaces, the pitch of the thread of the member, which is compressed during full engagement of the members, is greater than the pitch of the thread of the other member.