A drilling/injection device has a screw thread along the outside and a drill head, with cutting edges, at one end. A central channel conveys a flushing or other medium. The cutting edges are formed by weld beads on the circular area around the channel opening. Several variants are claimed.
申请公布号
DE3877740(D1)
申请公布日期
1993.03.04
申请号
DE19883877740
申请日期
1988.11.25
申请人
FRIEDR. ISCHEBECK GMBH, 5828 ENNEPETAL, DE
发明人
ISCHEBECK, DIPL.-ING., ERNST-FRIEDRICH;ISENBERG, JOACHIM, W-5828 ENNEPETAL, DE
