Drilling machine for drilling large drilling holes in rock, part

Boring or penetrating the earth – With tool drive prime mover or above-ground mechanical... – Rotary drive for a relatively advancing tool

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Details

74665B, 173163, 475 5, E21B 302

Patent

active

050296558

ABSTRACT:
A drilling machine for drilling large drill holes in rock, especially underground, comprises a support, a rotary drilling drive longitudinally displaceable on the support in a drilling direction and provided with a reducing transmission and drive motors. The reducing transmission including a planetary transmission which is transmissively and selectively connectable with two of the drive motors as a superposed transmission.

REFERENCES:
patent: 2451598 (1948-10-01), Wilson
patent: 3330164 (1967-07-01), Wilson
patent: 3503281 (1970-03-01), Gsching et al.
patent: 4732218 (1988-03-01), Neumaier et al.
patent: 4815546 (1989-03-01), Haney et al.

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