发明名称 |
Pick with an Interlocked Bolster |
摘要 |
In one aspect of the invention, a pick comprises a front portion with an impact tip brazed to a carbide bolster. The carbide bolster comprises a cavity which is formed in the bolster's base end and which is adapted to interlock with a rear portion of the pick. The rear portion is adapted to be retained within a bore of a holder that is attached to a driving mechanism. The rear portion comprises a locking mechanism adapted to lock its first end within the cavity. The locking mechanism comprises a radially extending catch that is formed in the first end of the rear portion.
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申请公布号 |
US2008106139(A1) |
申请公布日期 |
2008.05.08 |
申请号 |
US20080971965 |
申请日期 |
2008.01.10 |
申请人 |
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发明人 |
HALL DAVID R.;DAHLGREN SCOTT;MARSHALL JONATHAN |
分类号 |
E21C35/18;E21C25/10;E21C35/183 |
主分类号 |
E21C35/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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