Patent ID: 6553707
Filing Date: 2003-04-29
Classification: F41B,F41C

Abstract:
A butt structure for a pneumatic gun which has a cartridge firing mechanism located in a duct, an impact spring located behind a hammer, and a retain rod located behind the impact spring for anchoring the impact spring, the butt being located on a rear end of the duct of the cartridge firing mechanism, comprising:a butt frame; a sleeve housed in the butt frame being extendable and retractable therein, and having a front end with the peripheral surface thereof formed a screw section and a lateral side formed a first slot; a pneumatic control means including an adjusting ring, a push rod and a retain element for anchoring the push rod, the adjusting ring being coupled with the screw section and having an inner peripheral surface formed a retain trough, the retain element having an aperture formed on a lateral side to couple with a pin; and an inner tube fixedly housed in the sleeve having a front end to couple with an anchor section located on the rear end of the duct and a second slot formed on a lateral side thereof corresponding to the first slot; wherein the retain element and the push rod of the pneumatic control means are housed in the inner tube, the pin of the retain element being extended through the first slot and the second slot and engaging with the retain trough, the push rod having a front end pressing the retain rod of the cartridge firing mechanism, the adjusting ring being movable on the screw section for driving the pin to move the retain element to press the retain rod for controlling the strength of the impact spring thereby to adjust cartridge firing power.