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1. 发明授权

US3763942A Auger head 失效
标题翻译：奥格尔头
公开(公告)号：US3763942A
公开(公告)日：1973-10-09
申请号：US3763942D
申请日：1972-02-25
申请人： CONTRACTING & MATERIAL CO
发明人： LEVITT M
IPC分类号： E21B10/44 , E21B9/02
CPC分类号： E21B10/44
摘要： An auger or boring head, especially for horizontal rock and earth drilling having a circular ring of circumferentially spaced tool bits or teeth, a plurality of spokes or fins with leading ends carrying tool bits or cutting teeth in convex curved or arcuate contours from a central cutting point forwardly of the ring to the periphery of the ring. The cutting teeth on the ring project radially outward from the periphery thereof and are tilted forwardly in the direction of rotation of the auger head. The cutting teeth on the spokes or fins project forwardly, are tilted toward the direction of rotation of the head and are also tilted backwardly to present the tip end of each tooth in a straight forward direction to the surface which it is cutting. In addition, the teeth are staggered so that successive teeth will not have the same cutting track. A head or socket is provided in the center of the auger head for connection to a drill rod or stem. Large open areas are provided through the ring between the spokes or fins, and the earth or rock cut by the head is free to flow through these spaces to a spiral conveyor which preferably has it leading edge behind one of the spokes or fins.

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