公开(公告)号：US20040016573A1

公开(公告)日：2004-01-29

申请号：US10623766

申请日：2003-07-21

申请人： American Mine Services

发明人： Terry L. Rein SR. ,  Terry L. Rein JR.

IPC分类号： E21B017/07

CPC分类号： E21B17/00 ,  E21B17/04 ,  Y10T403/7098

摘要： A drill steel for use in mine roof bolting operations. To eliminate or reduce the possibility of fracture in drill steels used in the roof bolting operations in mines the square or hexagonal surfaces of such drill steels or the elements such as couplings, collars, and recesses that are to be connected to drill steels are machined rather than forged or welded. Pieces are joined by press fitting for assembly purposes.

摘要翻译： 用于矿山顶板螺栓操作的钻钢。 为了消除或减少在矿山中进行屋顶螺栓连接操作中使用的钻钢中的断裂的可能性，这些钻钢的正方形或六边形表面或与钻钢相连接的诸如联轴器，轴环和凹槽的元件被机械加工 比锻造或焊接。 通过压配接合件用于装配目的。