Tool driving or impacting – Automatic control of power operated means – Drive means responsive to condition of advance causing or...
Patent
1982-09-27
1984-10-23
Yost, Frank T.
Tool driving or impacting
Automatic control of power operated means
Drive means responsive to condition of advance causing or...
173 38, 173160, 175 27, 408 6, 408 11, B23Q 1500, F21C 516
Patent
active
044782900
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. An infrared source is held stationary with respect to the rod, and a detector moves upwardly with the rod. The detector receives radiation from the source and emits a signal which varies in accordance with the source to detector distance. This signal is used to control the upward thrust applied to the torque motor in accordance with the length of a pinning rod exposed below the roof being bolted. In one embodiment, the detector produces a signal based on the intensity of the received light. In another embodiment, the light is focused on the detector, which comprises a plurality of photodetectors and the signal produced is based on the number of detectors struck by the light.
REFERENCES:
patent: 2437608 (1948-03-01), Long et al.
patent: 3724559 (1973-04-01), Strommes
patent: 3918814 (1975-11-01), Weiser
patent: 4049965 (1977-09-01), Pettigrew
patent: 4320462 (1982-03-01), Lund et al.
patent: 4328872 (1982-05-01), Orthwein
Phan Hien H.
Yost Frank T.
LandOfFree
Anti-buckling device for mine-roof bolting machines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Anti-buckling device for mine-roof bolting machines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-buckling device for mine-roof bolting machines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1594611