专利名称：Retaining Element for a Jack Element发明人：David R. Hall,Francis Leany,Joe Fox,Tyson J.
Wilde,Boyd Black
申请号：US11774645申请日：20070709
公开号：US20080011521A1公开日：20080117
专利附图：
摘要：A drill bit having a bit body intermediate a shank and a working face having atleast one cutting insert. A bore is formed in the working face co-axial within an axis ofrotation of the drill bit. A jack element is retained within the bore by a retaining element
that intrudes a diameter of the bore.
申请人：David R. Hall,Francis Leany,Joe Fox,Tyson J. Wilde,Boyd Black
地址：Provo UT US,Salem UT US,Spanish Fork UT US,Spanish Fork UT US,Provo UT US
国籍：US,US,US,US,US
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