Patent ID: 8516930

Claim:
A fastener-driving sleeve assembly adapted to be driven by a rotary driving tool to thereby rotate a fastener, the rotary driving tool having a non-circular driving head, said fastener-driving sleeve assembly comprising; a connecting sleeve made of metal and having a tool-connecting portion and a fastener-connecting portion, said tool-connecting portion having a head-receiving hole adapted to engage fittingly the driving head of the rotary driving tool so as to allow for co-rotation of said connecting sleeve with the driving head, said fastener-connecting portion having a fastener-receiving hole adapted to engage fittingly the fastener so as to allow for co-rotation of the fastener with said connecting sleeve; and a reinforcing ring made of metal and sleeved fixedly on said fastener-connecting portion of said connecting sleeve: wherein: said fastener-connecting portion of said connecting sleeve further has a flange extending radially and outwardly therefrom to define an annular large shoulder surface, and a frustoconical intermediate portion defining an annular small shoulder surface facing said large shoulder surface; and said reinforcing ring having a front end surface abutting against said large shoulder surface, and defines a central bore having a frustoconical intermediate portion that engages fittingly said frustoconical intermediate portion of said connecting sleeve, said reinforcing ring further having an annular shoulder surface that defines an end of said frustoconical intermediate portion of said central bore and that abuts against said small shoulder surface of said connecting sleeve, such that a portion of said reinforcing ring disposed between said front end surface and said annular shoulder surface is confined between said large and small shoulder surfaces of said connecting sleeve, so as to prevent removal of said reinforcing ring from said connecting sleeve.