Sound Suppressor Using Closed Loop Recirculation

Abstract

The present invention relates a sound suppressing system for a firearm explosion gases with two coaxial tubes mounted on the gun barrel, defining two coaxial chambers, an inner chamber and an outer chamber, communicating at their ends through rear passages and front passages and two end caps, rear end cap and front end cap, and where the gases flow in one direction through the inner chamber and in opposite direction through the outer chamber and create a continuous loop that extends the travel path of the gases and allow for a gradual dissipation of the energy. Only a small portion of the gases, go straight through without being turned around.

I claim: 
     
         1 . A sound suppressing system for a firearm explosion gases with two coaxial tubes  3  and  5  mounted on the gun barrel, defining two coaxial chambers, inner chamber  21  and outer chamber  22 , communicating at their ends through rear passages  9  and front passages  8  and two end caps, rear end cap  1  and front end cap  4 , characterized by:
 Repeated recirculation  17  of the explosion gases taking place in successive opposite directions, direction  11  and direction  14  through each of the two coaxial chambers  21  and  22 , such that through every recirculation cycle  17 =12+13+14+15 the speed, temperature, pressure and energy of the gases are continuously and slowly decreased with low rate energy transfer in noise until the pressure inside the device in all chambers equals the ambient exterior pressure, 
 A helical spiral part  2  in the inner chamber  21  deviating part of the gases toward a spiral and longer path closer to inside wall of the inner tube  3  and spending more of the energy of the explosion gases. 
 
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . (canceled) 
     
     
         5 . A sound suppressing system as recited in  claim 1 , where a rear end cap  1  is equipped with an inlet rear nozzle  6  designed in such a shape as to guide the incoming gases  11  and delay the expansion of the gases over the rear end passages  9 . 
     
     
         6 . A sound suppressing system as recited in  claim 1 , where a front cap  4  of a toroidal inside shape  24  with a center nozzle  10  is used to receive, guide and turn back the incoming jet of gases  13  diverted by the spiral  2  toward the space between the inner tube  3  and outer tube  5 . 
     
     
         7 . A sound suppressing system as recited in  claim 1 , where the current invention uses a helical baffle  2  to impose a corkscrew motion  12  to the gas particles and direct some of the expanding gases away from the central axis  23  of the tubes  3  and  5  and toward the passages  8  and “U”-shaped return wall  24  of front end cap such that the gases will transfer from the inner chamber  21  to the outer chamber  22 . 
     
     
         8 . Any other solution based on a closed loop recirculation of the expanding gases in coaxial, cylindrical chambers where the gases travel in opposite sense through the chambers and a closed loop using end passages, so that the pressure, speed and the temperature are given an opportunity to progressively decrease over each loop and over a longer period of time than the normal explosion would using any combination of the features as per  claim 1 ,  2 ,  3 ,  4 . 
     
     
         9 . (canceled)