Abstract: A sweep ell production apparatus (10) receives extruded plastic pipe (98) from an extruder (96). The plastic pipe (98) is passed through a curved sizing sleeve (100) which imparts a curvature to the plastic pipe (98) while at the same time sizing the pipe wall thicknesses and exterior diameter. After the pipe (98) passes through the sizing sleeve (100) a clamp (84) is secured about the periphery of the pipe (98). The clamp (84) is driven by means of a motor (34) which causes the clamp (84) to travel along an arc (112) which corresponds with the radius of curvature of the sizing sleeve (100). As the clamp (84) draws pipe (98) along the arc (112) of travel, the pipe (98) is set to have the desired radius of curvature. After a selected arc length of pipe (98) is produced, the pipe section is cut to produce the desired sweep ell.

Abstract: A sweep ell production apparatus (10) receives extruded plastic pipe (98) from an extruder (96). The plastic pipe (98) is passed through a curved sizing sleeve (100) which imparts a curvature to the plastic pipe (98) while at the same time sizing the pipe wall thicknesses and exterior diameter. After the pipe (98) passes through the sizing sleeve (100) a clamp (84) is secured about the periphery of the pipe (98). The clamp (84) is driven by means of a motor (34) which causes the clamp (84) to travel along an arc (112) which corresponds with the radius of curvature of the sizing sleeve (100). As the clamp (84) draws pipe (98) along the arc (112) of travel, the pipe (98) is set to have the desired radius of curvature. After a selected arc length of pipe (98) is produced, the pipe section is cut to produce the desired sweep ell.

Abstract: Disclosed is a method and apparatus for repairing a buried main having connected lateral service conduits. In the method, a main is opened and cleaned of debris. Thereafter, an elongated conduit liner is axially inserted into a length of the buried main. The lateral service conduits are opened and cleaned from a point remote from their connection to the main. A dispenser is axially inserted through the service conduit to a point adjacent to the connection. At the connection, polyurethane material is dispensed into a portion of the service conduit and in the annular space between the main and the liner. Thereafter, the dispenser means is removed from the service conduit and the polyurethane material is allowed to set. A cutter apparatus is axially inserted into the service conduit and is manipulated to form a port through the polyurethane material and the wall of the liner to connect the service conduit to the liner.

Abstract: Disclosed is a method and apparatus for repairing a buried main having connected lateral service conduits. In the method, a main is opened and cleaned of debris. Thereafter, an elongated conduit liner is axially inserted into a length of the buried main. The lateral service conduits are opened and cleaned from a point remote from their connection to the main. A dispenser is axially inserted through the service conduit to a point adjacent to the connection. At the connection, polyurethane material is dispensed into a portion of the service conduit and in the annular space between the main and the liner. Thereafter, the dispenser means is removed from the service conduit and the polyurethane material is allowed to set. A cutter apparatus is axially inserted into the service conduit and is manipulated to form a port through the polyurethane material and the wall of the liner to connect the service conduit to the liner.