Patent ID: 7722092

Claim:
A pipe joint device, comprising: flanges mounted to ends of pipes to be coupled together or ends of both a pipe and a pipe joint to be coupled together, each flange having at least one ring groove around an outer circumferential surface thereof; a packing mounted to the flanges and having inner rings protruding from and integrally formed around an inner circumferential surface of the packing to closely engage with the ring grooves of the flanges; and a clamp having a packing seat to seat the packing therein, with a support sidewall formed by a radial inward extension of each side of the clamp, the clamp being divided into a plurality of clamp parts so that the clamp parts are placed around the packing and are fastened together by a locking member, wherein the packing comprises a main channel formed along a central line of an outer circumferential surface of the packing, and the clamp comprises a central rib formed on the packing seat to correspond to the main channel.