Drilling machine for drilling large drilling holes in rock, part

Details Drilling machine for drilling large drilling holes in rock, part Drilling machine for drilling large drilling holes in rock, part

1989-11-15

1991-07-09

Britts, Ramon S.

Boring or penetrating the earth

With tool drive prime mover or above-ground mechanical...

Rotary drive for a relatively advancing tool

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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