Patent ID: 6708685
Filing Date: 2004-03-23
Classification: F41B

Abstract:
A compressed gas-powered projectile accelerator, comprising:a housing having a forward end and a rear end, the housing including: a receiver passage adapted to receive a projectile, the receiver passage having a forward end and a rear end, a valve passage in communication with the receiver passage, the valve passage having a first end and a second end, the valve passage adapted to receive compressed gas from a source of compressed gas; a bolt located within the receiver passage having a forward portion and a rear portion, the bolt adapted to move along a length of the receiver passage between a forward position and a rearward position, the bolt biased toward the forward end of the housing by a bolt spring, the bolt having at least one aperture therethrough, the aperture adapted to allow compressed gas to pass between the rear end of the receiver passage and the forward end of the receiver passage when the bolt reaches a preselected position; and, a valve slider located within the valve passage having a first end and a second end, the valve slider adapted to move along a length of the valve passage, the valve slider adapted to selectively allow compressed gas to enter the receiver passage and act upon the bolt for controlling the sliding of the bolt between a forward and rearward position, wherein at or near its rearward position, the bolt opens a flow path for the compressed air to channel to the back of the bolt for urging the bolt toward the forward position, at or near its forward position, the bolt opens an air passage for compressed air to flow through the aperture in the bolt.