Patent ID: 8011441
Filing Date: 2011-09-06
Classification: B25C

Abstract:
1. A method for controlling a fastener driving tool, said method comprising: (a) providing a fastener driving tool that includes: (i) a housing, (ii) a system controller, (iii) a fastener driving mechanism that moves a driver member toward an exit end of the mechanism, (iv) a prime mover that moves a lifter member which moves said driver member away from said exit end of the mechanism, (v) a latch control device that is automatically controlled by said system controller, said latch control device, when commanded, being configured to move a latch member which has a catching surface, (vi) a safety contact element, (vii) a user-actuated trigger, and (vii) a fastener; (b) initiating a driving cycle by pressing said exit end against a workpiece and actuating said trigger, thereby: (c) actuating said prime mover, thereby moving said lifter member and causing said driver member to move away from said exit end toward a ready position; (d) then automatically de-activating said latch control device, which allows a mechanical biasing of said latch member to move the catching surface of the latch member to a position that interferes with movements of said driver member; and (e) automatically de-activating said latch control device after a predetermined time interval has occurred after a beginning of a driving stroke, thereby allowing a mechanical biasing of said latch member to move the catching surface of the latch member to a position that interferes with movements of said driver member, even if said driver member has not reached a full driving stroke position at said exit end, and thereby allowing a user to safely clear a jam condition of the tool.