发明授权
- 专利标题： Cable bolt head
- 专利标题（中）： 电缆螺栓头
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申请号： US652791申请日： 1996-05-23
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公开(公告)号： US5829922A公开(公告)日： 1998-11-03
- 发明人: Frank Calandra, Jr. , Eugene H. Stewart , Stanley Ponce , John G. Oldsen , John C. Stankus , Brian R. Castle , Robert Nestor
- 申请人： Frank Calandra, Jr. , Eugene H. Stewart , Stanley Ponce , John G. Oldsen , John C. Stankus , Brian R. Castle , Robert Nestor
- 申请人地址： PA Pittsburgh
- 专利权人： Jenmar Corporation
- 当前专利权人： Jenmar Corporation
- 当前专利权人地址： PA Pittsburgh
- 主分类号： E21D21/00
- IPC分类号： E21D21/00
摘要：
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.
公开/授权文献
- US4652514A Optical information recording medium 公开/授权日：1987-03-24
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