Patent ID: 7997955

Claim:
An apparatus for the circumferential interior treatment of pipe elbows, comprising: a base; a pipe support mounted for rotation on the base about a rotational axis; an arm support; an arm having a mounting end and a working end, the mounting end being mounted to the arm support; means for extending the working end of the arm into the pipe support and moving the working end of the arm between selected working positions; a working member positioned at the working end of the arm; and a pipe receiver positioned within the pipe support which rocks to control pitch of a pipe elbow supported by the pipe support to maintain a concentric rotation of the pipe elbow about the working end of the arm where the working member is located, wherein the pipe receiver has a first end, a second end, and outwardly projecting pins which travel along slots in the pipe support, means being provided to raise and lower the first end and the second end of the pipe receiver as the pins travel along the slots.