Patent ID: 8627749

Claim:
A drive apparatus for a rotatable fastener driving tool, comprising: an extending mechanism that is actuated by relative movement, and that has an output member which creates an indexing motion which is applied to a collated strip of fasteners, said extending mechanism including a drive belt which applies rotational motion to said output member; and an elongated feed tube having a first end and a second, opposite end along a longitudinal axis, said feed tube having an open volume therewithin, said first end being open and sized and shaped to receive said extending mechanism, said second end having an opening to receive a rotatable drive bit that extends through said open volume, said feed tube having a slidable surface, said drive bit having a distal end that, along said longitudinal axis, is located a distance P from said first end of the feed tube, said feed tube having a maximum outer width dimension W and a maximum outer height dimension H; wherein: (a) during operation, said extending mechanism is movable with respect to said feed tube, along said slidable surface of the feed tube, which is relative movement that actuates said extending mechanism; and (b) a ratio P/W is in the range of about 0.50 to 1.50.