Excavating and propelling machine for laying pipelines undergrou

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement

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405141, 175 53, 299 31, 299 45, F16L 100

Patent

active

045346763

ABSTRACT:
An excavating and propelling machine for laying pipelines underground has a plum-pudding stone crusher device comprising a plurality of rod-shaped rotary teeth formed integrally on the rear face of a disk-shaped rotating cutter head in a manner of extending radially at uniform intervals spaced apart from one another and a plurality of rod-shaped stator teeth formed integrally on the front surface of an annular front face plate in a manner of extending radially at uniform intervals space apart from one another. The rotary teeth and the stator teeth are disposed in the vicinity of each other.

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patent: 4332420 (1982-01-01), Coski

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