Anti-buckling device for mine-roof bolting machines

Details Anti-buckling device for mine-roof bolting machines Anti-buckling device for mine-roof bolting machines

1981-08-26

1983-02-01

Kunin, Stephen G.

Tool driving or impacting

Automatic control of power operated means

Drive means responsive to condition of advance causing or...

175 27, 227156, 250222R, 408 6, 408 11, B23Q 1500, F21C 516

Patent

active

043710409

ABSTRACT:
The invention comprises generally apparatus for use with an underground mine-shaft roof-bolting machine having a torque motor, a pinning rod held for rotation by the torque motor, a controllable arrangement for exerting upward thrust on the torque motor to force the pinning rod upwardly into the roof of a mine shaft, and a manual control for the upward thrust arrangement. The invention utilizes a light beam to detect buckling of the pinning rod and to disable the upward thrust arrangement.

REFERENCES:
patent: 2077106 (1937-04-01), Rashman
patent: 3724559 (1973-04-01), Stromnes
patent: 3835939 (1974-09-01), McEntire

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