Drive tool for fasteners

作者: Edward T. Arnn

DOI:

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摘要: A drive tool for use in driving a fastener having combination head slots to accommodate either flat-blade screwdriver or Phillips-type screwdriver, the both and blade, foot portions positioned on each of said blade engaging head. Additionally, centering tip is provided that fits into allows be guided proper position by slots.

参考文章(11)
Mark G. Coppejans, Combo screw driver head ,(1995)
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Timothy J. Case, Jeffrey A. Duncan, Kevin T. Stone, Blunt-nosed, self-retaining screwdriver ,(1996)
Edward T. Arnn, Nonslip screw driver ,(1975)
Maxwell A West, Cruciform screw driver ,(1955)
Edward T Arnn, Biting screw driver ,(1974)