Patent ID: 6431430
Filing Date: 2002-08-13
Classification: B25C,B25F

Abstract:
A combination of a battery operated multi-stroke fastening device and a coil of collated roofing nails for being driven into a workpiece by said fastening device, such that said fastening device comprises:a housing; a nose assembly carried by the housing and defining a drive track; a fastener feed pawl that moves successive fasteners into said drive track; a cylinder guide track mounted within said housing, said cylinder guide track having a forward end and a rearward end; a driver assembly including a plunger disposed in slidably sealed relation with said cylinder guide track, said driver assembly being movable forwardly through said cylinder drive track during a fastener impacting drive stroke, said driver assembly including a driver member connected with said plunger and movable through said drive track during alternating fastener impacting drive strokes and return strokes to impart a plurality of impacts upon a fastener to be driven into the workpiece so as to drive the fastener into the workpiece; a piston disposed in slidably sealed relation with said cylinder guide track, said piston being rearwardly spaced from said plunger of said driver assembly, an air space being disposed between said piston and said driver assembly and resiliently coupling said plunger with said piston during said alternating fastener impacting drive strokes and return strokes; and a motor operatively connected with said piston and constructed and arranged to drive said piston forwardly and rearwardly through said cylinder guide track to effect said alternating fastener impacting drive strokes and return strokes; a rechargeable battery that powers said motor; such that said coil of collated roofing nails comprises a plurality of roofing nails interconnected by a collation material, each of said nails having a shank portion with a shank diameter of about 0.120â€³Â±0.0015â€³ and a head portion with a head diameter of about 0.350â€³ to 0.438â€³, each of said nails being made from steel which is coated with a thermoplastic material that serves as a lubricant which facilitates driving of said nails into a workpiece so as to reduce the energy required to drive said nails into said workpiece.