Method of cutting apertures in lining in underground pipes

Details Method of cutting apertures in lining in underground pipes Method of cutting apertures in lining in underground pipes

1984-11-09

1986-03-25

Briggs, William R.

Metal working

Method of mechanical manufacture

Shaping one-piece blank by removing material

166 55, 409132, 409143, B23P 1700, B23C 302, E03F 306

Patent

active

045773882

ABSTRACT:
A method for re-establishing side connections to an underground pipe after the same has been lined with a rigid lining of synthetic resin is disclosed, and in the method a cutter of the unit located in the pipeline moves in accordance with a pre-programmed contour which matches the contour of the side connection, thereby effectively and quickly to re-establish the side connection.
The pre-programmed arrangement may be generated by sensing the side connection profile prior to the lining operation.

REFERENCES:
patent: 4197908 (1980-04-01), Davis et al.
patent: 4442891 (1984-04-01), Wood

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