发明授权
- 专利标题： Rock bolting
- 专利标题（中）： 岩石螺栓
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申请号： US871560申请日： 1992-04-21
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公开(公告)号： US5352065A公开(公告)日： 1994-10-04
- 发明人: Peter D. Arnall , Rataj Mieczyslaw
- 申请人： Peter D. Arnall , Rataj Mieczyslaw
- 申请人地址： AUX Bennetts Green
- 专利权人： The Ani Corporation Ltd.
- 当前专利权人： The Ani Corporation Ltd.
- 当前专利权人地址： AUX Bennetts Green
- 优先权： AUXPK5839 19910426
- 主分类号： E21D20/00
- IPC分类号： E21D20/00 ; E21D21/00 ; F16B31/02 ; E21D21/02 ; F16B31/00
摘要：
A drive nut (3,7) for a rock bolt, incorporating a nut (7) with a crimped protrusion (9), and an insert (3). The protrusion is crimped to form a plurality of lips (8) adapted to retain insert (3) in the head of the nut (7), the crimping being effected by a pressing tool having a number of preferably square bars. By this crimping technique, the drive nut (3,7) can be fabricated in such a way that the breaking torque required to expel the insert (3) from the nut (7) can be limited to a predetermined range.
公开/授权文献
- US5936178A Humidity control device 公开/授权日：1999-08-10
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