公开(公告)号：US06309159B1

公开(公告)日：2001-10-30

申请号：US09698016

申请日：2000-10-30

申请人： Steven Lee Weaver ,  Michael Andrew McLean ,  Eric Ivan Johnson

发明人： Steven Lee Weaver ,  Michael Andrew McLean ,  Eric Ivan Johnson

IPC分类号： F16B2500

CPC分类号： E21D21/0026 ,  E21D21/0053

摘要： An elongate roof bolt includes a bolt body having an axially extending central bore and defining a leading end. The leading end includes a pair of axially extending abutment elements formed by machining. Each abutment element includes an abutment face for engagement with a drill tip on opposite sides thereof, to transmit rotary forces during drilling. The drill tip extends across the leading end of the bolt body and is bonded to the abutment elements by welding, soldering or brazing. The bore opens out of said bolt bonded adjacent said leading end.

摘要翻译： 细长的屋顶螺栓包括具有轴向延伸的中心孔并限定前端的螺栓本体。 前端包括通过机械加工形成的一对轴向延伸的邻接元件。 每个邻接元件包括用于在其相对侧上与钻头接合的邻接面，以在钻孔期间传递旋转力。 钻头尖端延伸穿过螺栓本体的前端，并通过焊接，焊接或钎焊与抵接元件结合。 在与所述前端相邻的所述螺栓上开孔。