Tool for longitudinally subdividing sewer pipes

摘要

The invention relates to a tool for longitudinally subdividing buried sewer pipes having an asymmetric, generally oval cross section, made substantially of a support shoe opposing a cutting blade acting in the direction of the pipe axis. The device also has two side cutting blades and is moved through the old pipe by means of a rod and a cylindrical calibration mandrel.

主权项

1. A tool for longitudinally subdividing an underground sewer pipe of asymmetrical cross section, comprising:
a tubular support including an annular wall defining an opening; a support shoe arranged on the tubular support, the support shoe shaped as a circle sector and configured to conform to and rest against a curved inside of an old pipe, opposite a sole of the old pipe; a first cutting blade arranged on the tubular support in opposition to the support shoe for cutting the sole of the old pipe; and two second side cutting blades arranged on the tubular support at a distance to the first cutting blade.