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公开(公告)号:US3710879A
公开(公告)日:1973-01-16
申请号:US3710879D
申请日:1970-07-24
摘要: A drilling apparatus, especially for boring holes in the earth, having a drill as an integral unit including a first portion for starting the hole, a second portion for reaming the hole, and a third portion for maintaining the hole cylindrical. The drill is selectively fastened to a conventional auger. Extension plates may be attached to the third portion for drilling holes of different diameters. As an alternate embodiment, the first portion of the drill may include an auger, the drill and the auger being formed from a flat stock.
摘要翻译: 一种钻孔装置,特别是用于地球中的钻孔,具有作为整体单元的钻头,其包括用于启动孔的第一部分,用于铰孔的第二部分和用于保持孔圆柱形的第三部分。 钻头选择性地固定到常规螺旋钻上。 延伸板可以附接到第三部分,用于钻出不同直径的孔。 作为替代实施例,钻头的第一部分可以包括螺旋钻,钻头和螺旋钻由扁平坯料形成。