Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1996-01-11
2000-05-02
Graysay, Tamara L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
4052591, E21D 2100
Patent
active
060564822
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 drive head formed on the first end, the drive head having a plurality of driving faces on an exterior surface thereof. The drive head may be formed integrally with the multi-strand cable in one embodiment of the present invention. An alternative embodiment of the present invention forms a drive head as a separate member. With a separate drive head, a barrel and wedge assembly may be attached to the cable wherein the drive head 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.
Oldsen John G.
Ponce Stanley
Stankus John C.
Graysay Tamara L.
Jennmar Corporation
Lagman Frederick L.
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