公开(公告)号：WO2014118771A1

公开(公告)日：2014-08-07

申请号：PCT/IL2014/050084

申请日：2014-01-23

Applicant: DERIO MEDICAL INSTRUMENTS LTD.

Inventor： SHER, Arieh

IPC: B23B51/08 ,  B23B29/34

CPC classification number: B23B51/0045 ,  B23B2270/04 ,  B24D5/00 ,  B24D99/00

Abstract: A tool for forming undercuts in prefabricated boreholes includes a working head mounted on a driving shaft, both rotate at the same rotational speed. The working head center of gravity is always located eccentric to the driving shaft axis. As a result of the rotation of the driving shaft, centrifugal force is exerted on the working head causing it to slide outwardly relative to the driving shaft axis. The working head moves outwardly until its outer surfaces, which are impregnated with diamonds, come into contact with the borehole wall. With continued operation, the undercut tool grinds the borehole wall to create a widening of the borehole surface with a shape corresponding to the outer surface contour of the working head.

Abstract translation: 用于在预制钻孔中形成底切的工具包括安装在驱动轴上的工作头，它们以相同的转速旋转。 工作头重心始终位于驱动轴轴偏心。 由于驱动轴的旋转，离心力作用在工作头上，使其相对于驱动轴的轴线向外滑动。 工作头向外移动，直到其浸入有钻石的外表面与钻孔壁接触。 在继续操作的情况下，底切工具研磨钻孔壁，以形成对应于工作头的外表面轮廓的形状的钻孔表面的加宽。