Patent ID: 9683688
Date: 2017-06-20
CPC Classifications: F16L

Claim:
1. A threadless pipe coupling comprising: a socket; a plug configured for being inserted into the socket in an insertion direction; a sealing member arranged between a circumferential outer surface of the plug and a cooperating inner surface of a circumferential side wall of the socket, so as to provide a fluid tight seal when the plug is placed in the socket, said sealing member comprising a first seal surface facing in the insertion direction and an oppositely facing second seal surface, wherein a locking member is configured to retain the plug in the socket when the locking member is inserted in a transverse direction being perpendicular to the insertion direction through a slot in the circumferential side wall of the socket to engage around the plug at a location near the second seal surface, and when the locking member is in a mounted position, each of a plurality of ends of the locking member is located between the circumferential outer surface of the plug and the circumferential side wall of the socket as seen in the transverse direction, the locking member comprising a first axial end face and a second axial end face placed oppositely the first axial end face, and the slot being at least partially bound by axial contact surfaces of the socket, wherein each of the axial end faces is angled relative to the transverse direction, and each of the axial contact surfaces is angled relative to the transverse direction for cooperating with the axial end faces, whereby under an axial load acting along the transverse direction, the axial contact surfaces interact with the axial end faces to generate a force acting on the locking member in the transverse direction so as to keep the locking member in an engaged position.