POWERED FASTENER DRIVER AND OPERATING METHOD THEREOF

摘要

A powered fastener driver (10) includes a cylinder (50) and a drive piston (54) within the cylinder (50) being acted on by a driving force resulting from a pressure differential. The powered fastener further includes a drive blade (42) coupled to the drive piston (54) and operable to drive a fastener, and an adjustable valve for selectively introducing air from ambient atmosphere into the cylinder, thereby changing the pressure differential acting on the drive piston (54). By adopting a self-contained vacuum generating means as described above, the driver does not rely on any external vacuum source and can be used and carried with conveniently.