发明名称 INSULATING SCREWDRIVER HAVING WEAR IDENTIFICATION FUNCTION
摘要 An insulating screwdriver includes a handle, a drive shank having a first end mounted in the handle and a second end protruding outwardly from the handle, an insulating jacket mounted on the second end of the drive shank, and an identification insulating sleeve mounted between the second end of the drive shank and the insulating jacket. Thus, when the insulating jacket is worn out or broken due to friction or hit, the identification insulating sleeve is still located outside of the drive shank to provide a secondary insulating effect to the drive shank so as to protect the user when operating the drive shank.
申请公布号 US2009095138(A1) 申请公布日期 2009.04.16
申请号 US20080211806 申请日期 2008.09.16
申请人 LIN JACK 发明人 LIN JACK
分类号 B25B15/00 主分类号 B25B15/00
代理机构 代理人
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