| 摘要 |
<p>A drive tool (20a, 20b) which does not require any upper-body force from an operator to install a fastener (28) is disclosed. The drive tool (20a, 20b) includes a top portion (22a) which is engageable with a drive source (24) and a lower portion (26a) which is engageable with a fastener (28). The drive tool (20a, 20b) includes a spring (72a) which is configured to urge the lower portion (26a) and upper portion (22a) away from each other (i.e. relative to movement) and provide that a generally axial force is applied to the fastener (28) engaged with the lower portion (26a) of the tool (20a, 20b). Preferably, the lower portion (26a) of the drive tool (20a, 20b) includes one or more foot pads (30a, 30b) on which an operator may stand, and the spring (72a) becomes compressed when the operator stands on the foot pads (30a, 30b).</p> |
