Compressed gas supply device of an air rifle

A compressed gas supply device of an air rifle with an attachable source of compressed gas, comprising:

• a pressure chamber formed by a cylindrical body, a first end element and a second end element attached to it, wherein the first end element has an exit channel communicating with the rifle barrel;
• a valve and a tie, the tie including a front part, an intermediate part and an end part, wherein the valve and the tie are located on the same axis with the exit channel, and the edges of the first end element surrounding the entrance to the exit channel from the side of the pressure chamber form a valve seat;
• means for supplying compressed gas to the pressure chamber;
• a trigger mechanism,
• characterized in that
• the front part of the tie comprises a valve spring (7), while the valve (6) rests on the valve spring (7) and is moveable forward and backward in relation to the tie,
• in the pressure chamber (1) near the second end element (4) there is a piston (21) and a piston spring (22) on which the piston (21) rests, wherein the piston (21) divides the pressure chamber (1) into a front part located between the first end element (3) and the piston (21), and a rear part located between the piston (21) and the second end element (4), the piston (21) being moveable forward and backward in relation to the second end element (4),
• the piston (21) is made in the form of a cylindrical body and has a center hole (23).