Tool driving or impacting – With indicating or signaling means
Patent
1979-04-16
1981-09-22
Mackey, Robert
Tool driving or impacting
With indicating or signaling means
173 36, 173 52, 173147, 175219, 299 33, E21C 1102, E21C 2722, E21D 2000
Patent
active
042904900
ABSTRACT:
A roof drilling and bolting device comprising a mobile chassis and two cabs mounted to the front of the chassis for independent transverse (outward to the side) movement. The cabs have floors and protective canopies. Extensible hydraulic devices position the cabs outwardly of the chassis. Other extensible hydraulic devices raise and lower the cabs relative to the chassis. Mounted to the front of each cab is a drilling assembly including a rectilinear positioning device for drill pods which provides up-down and side-to-side movement of the drill pod in front of the cab. An extensible standard is positioned by a boom which extends forward of the chassis to provide a temporary roof support.
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Barthe Henry P.
Cobb William R.
Mackey Robert
Schroeder Brothers Corporation
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