Tunnel boring machine

Details Tunnel boring machine Tunnel boring machine

1991-12-04

1993-07-20

Bagnell, David J.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

405138, E21D 910, F16C 1710

Patent

active

052287521

ABSTRACT:
Tunnel boring machine whose driving shaft (4) adjacent to the boring head (6) is journalled in a bearing (12) which is intended to take up only radial forces. Shaft (4) is at its other end journalled in bearings (13,14) which take up both radial and axial forces.

REFERENCES:
patent: 3383138 (1968-05-01), Scaravilli et al.
patent: 4189186 (1980-02-01), Snyder
patent: 5125719 (1992-06-01), Snyder

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