Patent ID: 7870852

Claim:
A pneumatically powered projectile launching device, comprising: a body; a bolt located within the body and having a cylindrical back portion in which a backward facing working surface is formed at its rear end, a cylindrical middle portion having an outer diameter greater than that of the back portion, and a cylindrical front portion having an outer diameter greater than that of the middle portion; a first gas chamber located within the body, the first gas chamber having an opening through which the bolt extends into the first chamber and can move forward and backward thereby changing the volume of the first gas chamber, the bolt having a backward facing; and a gas valve located within the body to selectively release compressed gas into the first chamber, wherein the compressed gas, once released into the chamber, a) applies pressure on the backward facing working surface of the bolt to move the bolt forward, and then b) passes through a passage in the bolt to pneumatically force the projectile to leave the device.