CONNECTION DEVICE FOR FLUID MEDIUM PIPES, AND REMOVAL TOOL FOR THAT DEVICE Russian patent published in 2012 - IPC F16L37/91 

FIELD: machine building.

SUBSTANCE: device includes joint coupling and shutoff sleeve rigidly attached to joint coupling and serving for installation of spring retaining ring with inner teeth and rings for pushing of teeth in joint coupling and shutoff sleeve so that during pipe connection the spring retaining ring with inner teeth can clamp the pipe wall after the pipe passes through the shutoff sleeve, ring for pushing of teeth and spring retaining ring with inner teeth. Ring for pushing of teeth is in sliding contact with shutoff sleeve with possibility of its straight-line movement along longitudinal axis of connected or disconnected pipe. Shutoff sleeve is installed inside joint coupling, and upper end of the ring for pushing of teeth is located mainly on one and the same level with upper end of joint coupling or buried into it when pipes are connected, and when inner teeth are pushed off by means of ring for pushing of teeth, upper end of that ring is buried into joint coupling 6.

EFFECT: easier removal of pipe and prevention of quick wear and tear of and damage to upper part of ring for pushing of teeth.

7 cl, 7 dwg