Michael Best & Friedrich LLP
Powered fastener driver and operating method thereof
A powered fastener driver includes a cylinder and a drive piston within the cylinder being acted on by a driving force resulting from a pressure differential. The powered fastener further includes a drive blade coupled to the drive piston 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. By adopting a self-contained vacuum generating means as described above, the present invention does not rely on any external vacuum source and powered fastener driver can be used and carried with conveniently.
TECHTRONIC POWER TOOLS TECHNOLOGY LIMITED
B B B B
B25C B25C B25C B25C
inventional inventional inventional inventional
Xinghong Jinlin Liguo Jie Edward A. John Henry Essam Hailing Ziqiang
Li Zhou Ma Liu Pomeroy Schnell Johnson Namouz Lin Cao