Cutting head for drift advancing machines and process for...

Details Cutting head for drift advancing machines and process for... Cutting head for drift advancing machines and process for...

E - Fixed Constructions

21

C

262/10.1

E21C 35/22 (2006.01) E21C 35/23 (2006.01)

Patent

CA 1198456

ABSTRACT OF THE DISCLOSURE For the supply of water to nozzles on the circum- ference of a cutting head there are, within a cutting head composed of individual discs, provided bores extending in direction to the axis of rotation of the cutting head. The individual annular discs are connected one with the other by welding, the weld beads extending over a radial area of the cutting head which is greater than the diameter of the bores. The bores extend through the weld beads.

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