基本信息:
- 专利标题： Spade bits with angled sides
- 专利标题（中）：铲角配有斜边
- 申请号：US10077884 申请日：2002-02-20
- 公开(公告)号：US20020127071A1 公开(公告)日：2002-09-12
- 发明人： Kailash C. Vasudeva
- 主分类号： B23B051/02
- IPC分类号： B23B051/02
摘要：
A spade drill bit has a shaft and a spade head portion arranged on the shaft. The head portion has a rearward facing bottom edge, two longitudinal sides and a forward facing cutting edge. The cutting edge has a pointed, generally triangularly shaped tip and outer ends. The longitudinal sides of the head portion are bent along a bend in a direction of rotation of the drill bit during operation, so that the outer ends are bent forwards in the rotating direction. The bend runs from a first position at one of the longitudinal sides, closer to the bottom edge than to the cutting edge, and to a second position at the cutting edge between the outer end and the tip.
摘要（中）：
铲钻具有轴和设置在轴上的铲头部。 头部具有向后的底部边缘，两个纵向侧面和向前切割刃。 切削刃具有尖锐的，大致三角形的尖端和外端。 在操作期间，头部的纵向侧面沿着钻头的旋转方向沿着弯曲部弯曲，使得外端沿着旋转方向向前弯曲。 该弯曲部从第一位置延伸到一个纵向侧面，更靠近底部边缘而不是切割边缘，并且在外部端部和尖端之间的切割边缘处的第二位置延伸。
公开/授权文献:
- US06957937B2 Spade bits with angled sides 公开/授权日：2005-10-25