Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1996-05-23
1998-11-03
Graysay, Tamara L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
4052591, E21D 2100
Patent
active
058299220
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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Dywidag Systems International. USA, Inc.: Dywidag Passive Cable Bolt publication: Feb. 1994: 1 Sheet.
Stephen C. Tadolini and Jamie L. Gallagher: Cable Bolts for Longwall Gate Entry Support: pp. 77-89.
Calandra, Jr. Frank
Castle Brian R.
Nestor Robert
Oldsen John G.
Ponce Stanley
Graysay Tamara L.
Jenmar Corporation
Lagman Frederick L.
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