Patent ID: 8336748

Claim:
A device for driving a plurality of fasteners, the device comprising: a magazine configured to retain the plurality of fasteners; a drive blade configured to contact a fastener retained by the magazine; a driver member configured to impart an expulsion force to the drive blade that propels the drive blade to impact the fastener and expel the fastener from the magazine, the driver member configured to move along a path between a first position where the driver member is spaced apart from the drive blade and prevented from providing an the expulsion force and a second position where the driver member engages the drive blade to impart the expulsion force to the drive blade; a work contact element moveable in a linear direction between an extended position and a depressed position; and a blocking member connected to the work contact element and configured to move in the linear direction when the work contact element is moved in the linear direction, wherein the blocking member is positioned in the path of movement of the driver member and blocks the driver member from moving to the second position when the work contact element is in the extended position; wherein the driver member comprises an actuator, a driver mount and a flywheel, the driver mount being movable along the path between the first and second positions, the flywheel being rotatably mounted to the driver mount and configured to impart the expulsion force to the drive blade, wherein the drive blade includes a driver block, wherein the flywheel is spaced apart from the driver block by the driver mount when the driver mount is in the first position, wherein the flywheel is positioned in engagement with the driver block by the driver mount when the driver mount is in the second position, and wherein the actuator is configured to urge the driver mount to move from the first position toward the second position.