Fastener driving device

A fastener driving device (10) includes a nose assembly (22) carried by a housing (12) that has a reservoir (14). The nose assembly (22) has a fastener drive track (24). At least a portion of the fastener drive track (24) is defined by a movable portion (28) of the nose assembly (22). A fastener driver (42) is movably mounted in the housing (12) and configured to enter the drive track (24) and drive successive leading fasteners (32) into a workpiece (WP). A head valve (58) is constructed and arranged to be actuated so as to allow the pressurized gas to move the fastener driver (42) through an operating cycle. An actuator (64) is constructed and arranged to actuate the head valve (58). The actuator (64) includes a trigger valve (66) constructed and arranged to allow passage of the pressurized gas from the reservoir (14) to a chamber (70) above the head valve (58), and a contact valve (68) operatively connected to the movable portion (28) of the nose assembly (22).