POWERED FASTENER DRIVER

原文（中国語）

A powered fastener driver includes a drive blade movable from a top-dead-center (TDC) position to a driven or bottom-dead-center (BDC) position for driving a fastener into a workpiece, a piston coupled to the drive blade, a drive unit for providing torque to move the drive blade, a rotary lifter configured to receive torque from the drive unit in a first rotational direction for returning the drive blade from the BDC position toward the TDC position, and a gas spring assembly having a master supply cylinder in which gas is compressed by the piston in response to being moved from the BDC position toward the TDC position, a drive cylinder having a flange against which an end of the master supply cylinder is abutted, and an end cap secured to the master supply cylinder to apply a clamping force to the flange against the end of the master supply cylinder.