SCREW HOLDING SCREWDRIVER BIT AND COMBINATION THER

专利名称：SCREW HOLDING SCREWDRIVER BIT AND

COMBINATION THEREOF WITH SCREWS

发明人：Totsu, Katsuyuki申请号：EP03712978.0申请日：20030327公开号：EP1502706A1公开日：20050202

专利附图：

摘要：A screw holding screwdriver bit capable of effectively preventing a come-outfrom occurring by improving the structure of the blade portions thereof, capable ofbeing manufactured in a simple structure at a low cost, and capable of remarkably

increasing a working efficiency by allowing an appropriate and rapid screw tighteningoperation at all times, and the combination thereof with screws, the driver bit including aplurality of blade portions (12) having generally vertical end edge portions (13) formed atthe tip ends (12a) thereof, wherein one of the blade portions (12) is cut out in the axialdirection of the bit, a guide passage (16) of a specified length is provided in a shaft (11)portion continued generally on the extension of the cutout portion (15) of the bladeportion, and an elastic piece (18) allowed to elastically abut on a bit engagement groovein a screw head and having a screw holding function by the interaction thereof with theblade portion fitted in the bit engagement groove is inserted in the guide passage.

申请人：Totsu, Katsuyuki

地址：32-13, Oshiage 1-chome, Sumida-ku Tokyo 131-0045 JP

国籍：JP

代理机构：HOFFMANN - EITLE

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