#$%^&*AU2013207580A120140227.pdf#####PNEUMATIC ACTUATION ASSEMBLY Abstract An actuator assembly (200) is provided. The actuator assembly (200) includes housing (202) configured for operable engagement by a user, a trigger assembly (204) operably supported on the housing (202), a gas cartridge (210) releasably secured to the housing (202), a valve assembly (220) mounted within the housing (202) for controlling the flow of pressurized gas through the housing (202) and a cylinder actuator (225) operably operably connected to the valve assembly (220). The cylinder actuator (225) includes a piston (328) selectively extendable therefrom configured for depressing a plunger (62). The piston (328) includes a head (328a) having an inlet surface (128a) disposed within an inlet chamber (327a) of the cylinder actuator (225) and an outlet surface (128b) disposed within the outlet chamber (327b) of the cylinder actuator (225). The exposed surface area of the first surface is equal to the exposed surface of the second surface.7/7 325 329b 327b 325b 325a 32a 328b 329328a F] G. 9
