Powered fastener driver

A powered fastener driver comprising:

• a housing;
• a cylinder positioned within the housing;
• a piston movable within the cylinder from a top-dead-center (TDC) position to a driven or bottom-dead-center (BDC) position;
• a driver blade attached to the piston for movement therewith along a driving axis from the TDC position toward the BDC position for driving a fastener into a workpiece;
• a lifter operable to move the piston and driver blade, in unison, from the BDC position toward the TDC position;
• a drive unit positioned within the housing and operably coupled to the lifter, the drive unit including a motor having a first output shaft that extends along a motor axis;
• an inner frame positioned within the housing and including a drive unit housing portion in which at least a portion of the drive unit is received;
• a bumper coupled to and extending from the inner frame;
• a workpiece contact assembly coupled to the housing and movable from an extended position to a retracted position in response to contact with a workpiece, the workpiece contact assembly including a biasing element that biases the workpiece contact assembly into the extended position;
• a magazine configured to receive fasteners, the magazine including a first end and a second end opposite the first end;
• and
• a nosepiece assembly coupled to the first end of the magazine and including a channel from which consecutive fasteners from the magazine are driven;
• wherein the workpiece contact assembly is engageable with the bumper in response to an applied force that moves the workpiece contact assembly beyond the retracted position.

A powered fastener driver comprising:

• a magazine assembly configured to receive fasteners, the magazine assembly including a first end and a second end;
• a nosepiece assembly including a channel from which consecutive fasteners from the magazine assembly are driven;
• a pusher assembly slidably coupled to the magazine assembly, the pusher assembly configured to bias the fasteners within the magazine assembly toward the channel, the pusher assembly including
• a pusher body,
• a cover coupled to the pusher body, and
• a dry-fire lockout member coupled to the pusher body, the dry-fire lockout member positioned between the pusher body and cover, the pusher body and the dry-fire lockout member being selectively movable relative to each other, the pusher assembly adjustable between a first state in which the pusher body and the dry-fire lockout member are configured to move together in unison toward the channel, and a second state in which relative movement between the pusher body and the dry-fire lockout member has occurred;
• a pocket disposed at the second end of the magazine assembly that receives at least a portion of the pusher body when the pusher body is adjacent the second end of the magazine assembly;
• and
• a workpiece contact assembly movable relative to the nosepiece assembly between an extended position and a retracted position,
• wherein, in a first position of the dry-fire lockout member relative to the magazine assembly, the workpiece contact element is configured to slide past the dry-fire lockout member in response to movement toward the retracted position, and in a second position, the dry-fire lockout member inhibits movement of the workpiece contact assembly toward the retracted position when a predetermined number of fasteners remain in the magazine assembly, and
• wherein the pusher assembly is configured to transition from the first state to the second state prior to the predetermined number of fasteners in the magazine assembly being reached.