专利名称：Thread tap 发明人：Alfred C. Roth 申请号：US07/328370申请日：19890324
公开号：US05037251A 公开日：
电影 弱点
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鄙视英文19910806
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prence是什么意思>mean的歌词摘要：The prent invention relates to an improved thread-tapping device which permits both conventional and non-conventional driving means to be ud to drive the tap to form threads in a hole. The improved thread tap has a conventional t of flats arranged in a square configuration with each flmunchkins
at being spaced about the circumference of the shank at approximately 90 degrees with respect to one another. This first t of flats extends longitudinally at or about a free end of the shank of the thread tap in the direction of the cutting portion of the thread tap. Positioned between this first t and the cutting portion is a cond mounting ction which has a plurality of flats divisible by three. This cond t of flats is circumferentially spaced about the shank of the thread tap and longitudinally extends from about the terminus of the first t in the direction of the cutting portion. The first t of flats is conventional and can be mounted within a conventional tap driving device. The cond t of flats is arranged to receive and be clamped within a non-conventional tap driving device.
法人代表英文申请人：ROTH; ALFRED C.
代理人：Dykema Gostt
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