Tool driving or impacting – With indicating or signaling means
Patent
1974-11-22
1976-04-20
Leppink, James A.
Tool driving or impacting
With indicating or signaling means
173 52, 299 10, E21C 1102, E21C 2722
Patent
active
039512150
ABSTRACT:
Apparatus for drilling holes and installing roof bolts therein for the support of a mine roof includes a prime mover operably connected to a mobile body portion having a pair of spaced apart individually operated drill units. Each drill unit is movably supported on a horizontal frame portion of the mobile body portion by a carriage. The carriage is reciprocally mounted on a plurality of parallel spaced transversely extending beam members that are rigidly secured to the horizontal frame portion. A fluid actuated piston cylinder assembly connected to the carriage is operable to transversely move the carriage with the drill unit along a path transverse to the longitudinal axis of the mobile body portion for drilling holes at preselected spaced intervals in the mine roof. The movement of the carriage is remotely controlled from an operator's station that is protected by an overhead canopy. After drilling a transverse row of bolt holes and installing roof bolts therein, a telescoping mechanism connected to the body portion is forwardly extended a preselected distance and parallel to the longitudinal axis of the mobile body portion. Roof and ground engaging jacks positioned on the end portion of the telescoping mechanism are actuated to rigidly brace the telescoping mechanism. The telescoping mechanism is retracted and the entire mobile drilling machine is forwardly advanced a preselected distance for positioning the drill units to drill a subsequent transverse row of bolt holes parallel to and spaced from the previous row of drilled holes. Fluid activated roof support and ground engaging jacks are also provided on the mobile body portion to support the mine roof and brace the machine during the drilling and bolting operations.
REFERENCES:
patent: 3375880 (1968-04-01), Pyles et al.
patent: 3768574 (1973-10-01), Long
patent: 3834761 (1974-09-01), Ray et al.
patent: 3842610 (1974-10-01), Willis et al.
Leppink James A.
Price, Jr,. Stanley J.
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