A perforation device to open tunnels, galleries or other cavidades anywhere. (Machine-translation by Google Translate, not legally binding)

摘要

A drilling device for opening tunnels, gallery or any other cavities, with a cylindrical shield movable in the direction of drilling and a drilling machine supported therein, especially a whole cutting machine, being provided for expansion organs distributed on the periphery of the shield and props against the walls of the hollow, which serve for the control of orientation of the shield, characterized in that the expansion organs are arranged in the shield running in peripheral direction and forming an acute angle with the longitudinal and horizontal central longitudinal planes of the shield . (Machine-translation by Google Translate, not legally binding)