Patent ID: 6017064
Filing Date: 2000-01-25
Classification: F16L

Abstract:
In combination, a main pipe, a lateral pipe and a restraint for relieving the fatigue stress at a joint between the main pipe and the lateral pipe, comprising:an integral restraint body formed of a plastic material and having a generally semi-circular bend intermediate opposite ends thereof for receiving within the bend a side portion of the main pipe remote from the joint;said opposite ends of said body having arcuate sections about axes generally normal to an axis of said semi-circular bend for securement externally about respective opposite sides of the lateral pipe, said main pipe and said lateral pipe being formed of a plastic material and secured to one another independent of said restraint body, and a chemical solvent for welding said arcuate sections about opposite sides of said lateral pipe, whereby, upon securement about the main pipe side portion and the lateral pipe, said body relieves the stress at the joint between the main pipe and the lateral pipe.