Patent ID: 6986533
Filing Date: 2006-01-17
Classification: F16L

Abstract:
1. A pipe coupling for connecting pipes with each other, the pipe coupling comprising: a connection tube having changing inner and outer diameters, the connection tube including holding shoulders formed at opposite predetermined inner portions of the connection tube and maximum diameter portions formed at both side portions of the connection tube outside of the holding shoulders, each of the holding shoulders limiting a depth by which each of the pipes can be inserted, the maximum diameter portions respectively having an inner diameter much larger than an outer diameter of the pipes, the connection tube having an inner diameter which decreases in a direction toward both mouths of the connection tube from the maximum diameter portions; snap rings inserted inside of the mouths of the connection tube in a compressed state; packing members, each of which is tightly disposed in each of the maximum diameter portions; jaw couplings inserted in the mouths of the connection tube, each of the jaw couplings being assembled with a plurality of fixing jaws and having engaging protuberances, the fixing jaws respectively having serrations formed at a surface to be in contact with each of the pipes, the fixing jaws being arranged in a circumferential direction of each of the jaw couplings, each of the engaging protuberances having a width smaller than an interval of a spaced portion of each of the snap rings, the engaging protuberances being engaged with inner ends of the snap ring; and elastic members inserted between the jaw couplings and the packing members.