Patent ID: 7131563
Filing Date: 2006-11-07
Classification: B25B,B25C

Abstract:
1. A nail driver bumper comprising an inner pad and an outer pad which are made of heat-resisting elastomer material; the nail driver bumper being assembled within a bottom of a cylinder; a nail-beating piston being installed within the cylinder to isolate the cylinder into an upper chamber and a lower chamber as the nail-beating piston moves; a bottom of the nail-beating piston being formed with a nail-beating rod; a central hole is formed on the inner pad for receiving the nail-beating rod; a central hole is formed on the outer pad, the inner pad being embedded into the central hole of the outer pad; a lower side of the lower chamber having a seat which is fixed to a bottom of a driver body; the seat having a hole for receiving the nail-beating rod; a gap formed between the seat hole and the nail-beating rod for ventilating air; a plurality of axial ribs arranged between the inner pad and the outer pad; the axial ribs being arranged to have a radiation pattern; an axial slot being formed between two adjacent axial ribs; and a top of each axial slot being communicated to the lower chamber; an axial channel and a radial channel being formed at a lower end of each axial slot; the axial channel and radial channel of each axial slot being communicated with the axial slots and the central hole of the inner pad so as to communicate with the lower chamber; thus forming a plurality of air paths between the inner pad and the outer pad in the bumper which is communicated to the lower chamber and the gap.