| 摘要 |
<p>A fastener drive tool (20) for applying a rotational torque to a threaded fastener (48) for driving the fastener (48) into or out of a workpiece. The drive tool (20) has an elongated shank member (24) with a free end (26) which is selectively controllably engagable with a recess (50) formed in the fastener (48). The free end (26) is formed with a recess engaging bit portion (28) and a fastener retaining expansion assembly (30). The expansion assembly (30) includes a compressible member (58). The compressible member (58) is radially outwardly deformed by axial compressive forces applied thereto to create fastener retaining contact on an opposing internal surface (84) of the fastener recess (50) in which it is positioned. <IMAGE></p> |
