Patent ID: 7695024
Filing Date: 2010-04-13
Classification: F16L

Abstract:
1. A coupling arrangement for connecting pipe shaped sections comprising: a first pipe section, presenting an essentially longitudinal axial direction, which pipe wall presents an inner side having a first inner circumference and an outer side having a first outer circumference a coupling device arranged to connect said first pipe section with a second pipe section, said coupling device comprising two shanks, each shank provided with a free, distal end wherein said first pipe section is arranged to receive and surround a second pipe section with a second outer circumference, which is smaller than the first inner circumference of the first pipe section, so that the second pipe section at least partly can be introduced into the first pipe section and both pipe sections thereby form an overlapping region when connected said first pipe section is provided with a through hole in the pipe wall in the part of the first pipe section which, when connected with the second pipe section, form the overlapping region said coupling device is arranged to at least partly enclose and be in contact with the first pipe section in the overlapping region wherein the coupling device is adapted to protrude into and through the through hole in the first pipe section said coupling device further adapted to be able to change between a first position for locking of the connection, wherein said coupling device causes a protruding part on the inner side of the first pipe section, and a second position for release of the connection wherein the coupling device essentially not is protruding on the inner side of the first pipe section said coupling device is at least at one of its free, distal ends of the shanks attached slidably along the first pipe section in a direction essentially perpendicular to the axial direction of the pipe section so as to be able to perform a rotating movement around the longitudinal axis of the pipe section said coupling device is further provided with a protuberance which, when pressed upon in a turning direction around the longitudinal axis of the first pipe section, displaces one of the ends of the coupling device along the first pipe section in a direction essentially perpendicular to the axial direction of the pipe section in a rotational movement along the circumference of the pipe section in such a way that the part protruding through the inner side of the first pipe section of the coupling device will move towards the outer side pipe wall in a partly radially, outwards direction and partly rotational movement around the longitudinal axis of the pipe section in order to change the coupling device between the first, locked position and the second, releasing position; said first pipe section includes a pair of arc shaped disks disposed on an outer side of the first pipe section and have a plane perpendicular to the axial direction of the first pipe section and each disc comprises an inner side facing the coupling device and an outer side turned away from the coupling device, the discs having edges which are facing radially outward with respect to the first pipe section and are provided with shoulders said coupling device further comprising a pair of shanks extending from a central part of the coupling device and are configured to attach the coupling device to the first pipe section, the shanks include pins disposed at ends of the shanks and are configured to stretch in an axial direction in such a way that both ends thereof reach past the arc shaped discs and rests upon the edges of the discs and are configured to travel between the shoulders of the edges of the discs and hooks located at a lower predefined position forming a stop.