Mechanical truss wrench

Details Mechanical truss wrench Mechanical truss wrench

1995-02-09

1996-04-09

Schoeppel, Roger J.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

4053021, E21D 2102

Patent

active

055055621

ABSTRACT:
A mechanical truss wrench for use with a mine roof bolting machine. The wrench includes a casing having a locking bracket pivotably secured to the exterior. An input shaft extends into the casing and is positioned at a right angle to an output shaft extending out of the casing. The lower end of the input shaft is secured to the torquing member of the mine roof bolting machine. In operation, a socket on the output shaft is engaged with a head of a horizontally extending torquing bolt or similar tensioning mechanism of a truss-type mine roof utilizing U-bolts. The input shaft is rotated about a vertical axis to operate a gear train to rotate the output shaft and the socket to torque the bolt. A locking member with tabs coacts with the legs of a U-bolt or similar tensioning mechanism to prevent the casing from rotating about the axis of the input shaft and a guiding member is provided to assist in guiding the torquing bolt into the socket.

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