SYSTEM FOR MAKING HOLES IN EXISTING WATER NETWORKS UNDER PRESSURE

摘要

This is a device for rapidly opening holes in main pipelines under pressure by use of an electric reduction gear or hydraulic engine or even a compressed air motor, using a rotating, moving shaft with a cutting tool ("tumbler"). The device has a two-part iron base, with a special flange that fits on various sizes of gate valve to obtain (supply) water.