Frank Calandra - Pittsburgh PA Eugene H. Stewart - Pittsburgh PA Stanley Ponce - Cresson PA John G. Oldsen - Butler PA John C. Stankus - Canonsburg PA Brian R. Castle - Rolla MN Robert Nestor - Albright WV
Assignee:
Jenmar Corporation - Pittsburgh PA
International Classification:
E21D 2100
US Classification:
4053022
Abstract:
A plurality of designs for mine roof bolts is disclosed. Each mine roof bolt includes a flexible multi-strand cable having a first and second end with a drivehead formed on the first end, the drivehead having a plurality of driving faces on an exterior surface thereof. The drivehead is a separate member. A barrel and wedge assembly is attached to the cable wherein the drivehead is utilized substantially for rotating the cable.
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