Patent ID: 6128799
Filing Date: 2000-10-10
Classification: B08B,E03F

Abstract:
A conduit interior smoothing device comprising a device body containing a fluid pressure motor having a cutter mounted on a projecting output shaft, said motor further adapted to be driven with a high-pressure fluid, a moving means attached to the body for forcedly advancing the smoothing device, a removed debris discharge means attached to the body, said removed debris discharge means further adapted to use said high-pressure fluid, and a guiding means attached to the body for guiding the smoothing device in a longitudinal direction of a conduit line, said guiding means further has at least three device front guide rollers and at least three device rear guide rollers, at least one of each of the at least three front guide rollers and at least three rear guide rollers are attached to a lower half of the smoothing device and at least one of each of the at least three front guide rollers and at least three rear guide rollers are attached to an upper half of the smoothing device, and all said front guide rollers disposed on the lower half of the smoothing device are engaged with the smoothing device body via a spring as irregularity absorbing means and movable in a radial direction of the conduit line and said guide rollers attached to the upper half of the smoothing device are fastened to the smoothing device by a fluid pressure cylinder and are movable in the radial direction of the conduit line, and said fluid pressure cylinder also adapted to be operated by the high-pressure fluid.