Patent ID: 8353435

Claim:
A fastening device that drives one or more fasteners into a workpiece, the fastening device comprising: a tool housing; a multistage solenoid contained in said tool housing, said multistage solenoid includes an armature member that travels through at least a first stage, a second stage and a sense coil disposed therebetween; a driver blade assembly including a driver blade connected to said armature member, wherein said driver blade and said armature member are movable between an extended condition and a retracted condition; a trigger assembly connected to a control module and partially contained within said tool housing, wherein said trigger assembly is operable to activate a driver sequence that moves said driver blade between said retracted condition and said extended condition; and a voltage boosting circuit having a first boost module and a second boost module that charge to a boost voltage when said trigger assembly activates said driver sequence, wherein said first boost module and said second boost module deliver an increased current from a battery to said multistage solenoid at said boost voltage.