专利名称：Deep drilling tool发明人：Karl Burgsmuller申请号：US05/907865申请日：19780519公开号：US04268197A公开日：19810519
摘要：The deep drilling tool for workpieces includes a drill bit having an orifice with atleast one cutting edge, and a hollow drill stem connectable to the drill bit. The interior ofthe stem is divided by a longitudinal partition in at least two separate passages. Onepassage communicates with the orifice of the bit whereas the end part of the or eachother passage communicates through openings in the wall of the stem with the exteriorsurface of the tool. The free end of the stem is provided with inlet means for feedingpressure fluid into the or each other passage, whereas the used pressure fluid togetherwith the drilling chips is discharged through the bit orifice and the first-mentionedpassage.
申请人：BURGSMUELLER; KARL
代理人：Michael J. Striker
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