发明申请
- 专利标题： SNAP RINGED BIT RETAINER RING
- 专利标题（中）： SNAP RINGED位保持环
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申请号： US12022764申请日： 2008-01-30
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公开(公告)号： US20080185187A1公开(公告)日： 2008-08-07
- 发明人: Justin Scott , Shantanu Swadi , Lance Underwood
- 申请人： Justin Scott , Shantanu Swadi , Lance Underwood
- 申请人地址： US TX Houston
- 专利权人： SMITH INTERNATIONAL, INC.
- 当前专利权人： SMITH INTERNATIONAL, INC.
- 当前专利权人地址： US TX Houston
- 主分类号： E21B17/043
- IPC分类号： E21B17/043
摘要：
A bit retainer system includes a bit having a head and a shank, a driver sub disposed around the shank of the bit and adapted to engage a hammer case, a bit retainer disposed around the shank of the bit and abutting an upper end of the driver sub, wherein the bit retainer includes a split ring with a circumferential groove, and a secondary retainer disposed around the bit retainer, wherein the secondary retainer includes a snap ring configured to engage the circumferential groove.