AIR GUN ASSEMBLY AND A PIN FOR FILLING AND BLEEDING A PRESSURE TUBE ASSEMBLY

Original (Chinese)

An air gun assembly includes a gun tube and a pressure tube assembly. The gun tube defines a first aperture. The pressure tube assembly includes a fill block and a cylinder coupled to each other. The fill block defines a second aperture and the cylinder defines a chamber configured to contain compressed gas. The air gun assembly includes a pin disposed through the first aperture and the second aperture to couple together the fill block and the gun tube. The pin defines a channel. The air gun assembly also includes a valve assembly attached to the pin and at least partially disposed inside of the channel. The valve assembly is configured to selectively allow fluid communication into the chamber via the channel.