<p>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.</p>
申请公布号
CA2194818(C)
申请公布日期
2006.03.21
申请号
CA19972194818
申请日期
1997.01.10
申请人
JENNMAR CORPORATION
发明人
CALANDRA, FRANK, JR.;STEWART, EUGENE H.;PONCE, STANLEY;OLDSEN, JOHN G.;NESTOR, ROBERT;STANKUS, JOHN C.;CASTLE, BRIAN R.