Pneumatic gun

Abstract

The present invention relates to a pneumatic gun capable of coating the bullets projected from it with a desired color for identification purpose. The pneumatic gun includes a gun body, a trigger, a gun barrel, a gas tank and a dye coating device. The dye coating device is mounted within the gun barrel, so that a bullet projected from the pneumatic gun is coated with dye having a desired color when passing through the dye coating device. As a result, the object hit by the bullet is stained with the color and can be easily identified.

What is claimed is: 
     
         1 . A pneumatic gun, comprising:
 a gun body;   a trigger pivotally mounted to the gun body;   a gun barrel extending from the gun body and having a free end formed with an outlet opening, wherein the trigger is connected to and cooperates with the gun barrel to project bullets from the outlet opening;   a gas tank installed within the gun body; and   a dye coating device mounted within the gun barrel and comprising a dye coating module, wherein the dye coating module comprises a bullet passage tube and a dye powder reservoir surrounding the bullet passage tube and the bullet passage tube is disposed in communication with the dye powder reservoir via a plurality of apertures, and wherein the bullet passage tube has a front end connected to the outlet opening of the gun barrel.   
     
     
         2 . The pneumatic gun according to  claim 1 , wherein the dye coating device further comprises a unidirectional check module mounted at the rear of the dye coating module, and wherein the unidirectional check module comprises at least one backflow-proof filter formed with a plurality of radially arranged incisions. 
     
     
         3 . The pneumatic gun according to  claim 2 , wherein the at least one backflow-proof filter comprises a convex portion protruding toward the free end of the gun barrel. 
     
     
         4 . The pneumatic gun according to  claim 2 , further comprising an inner tube mounted within the internal space of the outer tube to accommodate the unidirectional check module and the dye coating module, so that the inner tube and the bullet passage tube cooperatively define the dye powder reservoir. 
     
     
         5 . The pneumatic gun according to  claim 4 , wherein the inner tube comprises an upper half and a lower half, both being formed on the inner walls thereof with recesses for positioning the unidirectional check module and the bullet passage tube, and wherein the upper half is coupled to the lower half by a buckle element. 
     
     
         6 . The pneumatic gun according to  claim 5 , wherein the buckle element comprises one or more first clip portions and one or more second receiver portions, and wherein the respective first clip portions are received by and engage the respective receiver portions. 
     
     
         7 . The pneumatic gun according to  claim 2 , wherein the unidirectional check module further comprises a first fastener member and a second fastener member, and wherein the at least one backflow-proof filter is sandwiched in position between the first fastener member and the second fastener member. 
     
     
         8 . The pneumatic gun according to  claim 7 , wherein the first fastener member is provided with one or more third clip portions and the second fastener member is provided with one or more fourth receiver portions, and wherein the respective third clip portions are received by and engage the respective fourth receiver portions.