Portable earth boring machine

Details Portable earth boring machine Portable earth boring machine

1974-11-29

1976-02-24

Purser, Ernest R.

Boring or penetrating the earth

Automatic control

173 2, 175 61, 175 73, 175 45, 299 1, E21B 710

Patent

active

039399265

ABSTRACT:
A portable earth boring machine for the horizontal boring of shafts and the insertion of pipeline casing sections in installations where excavation from the surface is undesirable. The machine is characterized by a steering head particularly adapted for rock drilling operations which head is positioned at the front of the casing with such steering head being automatically controlled so as to directionally control the direction of extension of the pipeline as the drilling operation progresses.

REFERENCES:
patent: 3415329 (1968-12-01), Marlind
patent: 3526285 (1970-09-01), Adkins et al.
patent: 3767836 (1973-10-01), Geis et al.
patent: 3851716 (1974-12-01), Barnes
patent: 3857449 (1974-12-01), Kimura

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