Fastening tool assembly

A fastening tool assembly comprising:

• a housing having a first end and a second end, with a contact surface extending from the first end to the second end to contact a workpiece, and a fastener outlet provided at the first end of the housing, through the contact surface to dispense fasteners from the outlet;
• a magazine sleeve fixed longitudinally within the housing;
• a magazine body having a proximal end and a distal end spaced apart from the proximal end, the magazine body being received within the magazine sleeve to translate longitudinally to a retracted position whereby the proximal end is adjacent the housing outlet to store fasteners within the sleeve and to convey the fasteners to the fastener outlet, and to translate to an extended position whereby the body extends at least partially out of the sleeve and external of the housing for receipt of fasteners to the body;
• a bracket operably connected to the magazine body distal end for longitudinal translation and partial rotation relative to the body;
• a biasing member connected to the bracket and the magazine body for biasing the bracket longitudinally away from the magazine body distal end;
• a latch mounted to the housing to engage the bracket in the retracted position of the magazine body to lock the bracket to the housing, and consequently to maintain the magazine body in the retracted position, wherein the latch is movable to a disengaged position wherein the bracket is biased away from the magazine body;
• a knife mounted in the housing for translation relative to the outlet for a loaded position and an unloaded position to drive a fastener from the magazine body through the outlet during translation to the unloaded position;
• a biasing member mounted in the housing and operably connected to the knife to bias the knife to the unloaded position;
• a lever pivotally connected proximate to the first end of the housing spaced apart from the contact surface, the lever having a proximal end operably engaged with the knife in the unloaded position, and a distal end extending from the housing, so that application of an external force to the lever distal end towards the housing pivots the lever relative to the housing, thereby translating the knife from the unloaded position to the loaded position, whereby the lever proximal end disengages from the knife permitting the biasing member to return the knife to the unloaded position to consequently drive a fastener through the outlet, wherein rotation of lever distal end away from the housing reengages the lever proximal end with the knife;
• a handle pivotally connected to the first end of the housing and operably engaged with the lever distal end, such that rotation of the handle towards the housing rotates the lever towards the housing;
• and
• a roller directly connected to the lever and the handle for permitting translation of the lever relative to the handle as the lever and the handle are pivoted relative to the housing;
• wherein the roller is pivotally connected to the lever;
• wherein the handle includes a follower path formed underneath the handle for engagement with the roller;
• wherein the follower path is formed underneath the handle at a distal end of the handle;
• wherein the biasing member is further defined as a first biasing member;
• and
• wherein the fastening tool assembly further comprises a second biasing member cooperating with the latch and the housing to bias the latch into engagement with the bracket.