Patent ID: 8388026
Filing Date: 2013-03-05
Classification: F16L

Abstract:
1. A repair coupling suitable for joining a first pipe in fluid tight communication with a second pipe, the repair coupling comprising: (a) a hollow body having a first open end, a second open end, an exterior surface, an interior surface and a longitudinal axis, the body defining a linear passageway between the first open end of the body and the second end of the body, the linear passageway having an interior diameter, the interior surface of the body, proximate to the first open end of the body, defining a peripheral, helical body edge terminating in a body edge locking lug; (b) a hollow tubular insert slidably disposed within the body, the tubular insert having a first open end, a second open end, an exterior surface, an interior surface, an external diameter and a longitudinal axis, the tubular insert defining a linear passageway between the first open end of the tubular insert and the second open end of the tubular insert, the exterior surface of the tubular insert defining a peripheral, helical insert edge terminating in an insert edge locking lug; and (c) a sealing element for sealing the exterior surface of the tubular insert with the interior surface of the body; wherein the tubular insert is slidable between (i) a first insert position wherein the helical insert edge is in contract with the helical body edge, and (ii) a second insert position wherein the helical insert edge is spaced apart from the helical body edge; and wherein, when the insert is in the first insert position, the rotation of the body in a first direction causes the body edge locking lug to engage the insert edge locking lug and to thereby rotate the tubular insert, and the rotation of the body in a direction opposite to the first direction causes the tubular insert to travel towards the second open end of the body.