发明授权
- 专利标题： Bit holding system with an opening for removal of broken bits
- 专利标题（中）： 位保持系统，带有打开的位，用于清除断头
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申请号： US13004407申请日： 2011-01-11
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公开(公告)号： US08740314B2公开(公告)日： 2014-06-03
- 发明人: Michael L. O'Neill
- 申请人： Michael L. O'Neill
- 申请人地址： US DE Wilmington
- 专利权人： Joy MM Delaware, Inc.
- 当前专利权人： Joy MM Delaware, Inc.
- 当前专利权人地址： US DE Wilmington
- 代理机构： Michael Best & Friedrich LLP
- 主分类号： E21C35/19
- IPC分类号： E21C35/19 ; E21C35/18 ; E21C35/187
摘要：
A cutting tool assembly including a bit holder having a forward portion, a rearward portion, and a generally planar mounting surface between the forward and rearward portions. The forward portion defines a front aperture having an axis inclined relative to the mounting surface, and the rearward portion defines a rear aperture open to the front aperture. A cutting bit is mounted in the front aperture and includes a rearward end accessible through the rear aperture of the bit holder rearward portion.