Structure of a muffler at the rear of exhaust pipe

Abstract

The present invention discloses an improved structure of a muffler at the rear end of an exhaust pipe, mainly comprising a tapered inner pipe inside a tapered conical outer pipe, and a plurality of silencing holes being disposed on the wall of the inner pipe, and a silencing cotton wrappers around and covers the external rim of the inner pipe, and a sleeve being disposed in the inner pipe proximate to the rear end of the inner pipe. The front end of such sleeve is a tapered conical pipe, and the rear end slight extends to the outside of the rear end of the external pipe. A decorative lid covers the rear end surface of the external pipe, and a gas-receiving pipe having a French connector being soldered to the front end of the external pipe, and an n-shaped fixing bracket having a fixing hole on it being soldered to an appropriate position on the external surface of the external pipe proximate to the rear end. The assembly of the foregoing components enables the muffler to increase the output torque of the engine, reduce the noise, and provides an easy installation for all sorts of vehicles.

What is claimed is:  
     
         1 . A muffler structure at the rear end of an exhaust pipe, mainly comprising a converging tapered external pipe disposed in a diverging tapered inner pipe; a plurality of densely distributed silencing holes being disposed on the wall of said inner pipe; a silencing cotton being wrapped around the external edge of the inner pipe; a sleeve being coupling to the internal edge proximate to the rear end of the inner pipe; and a converging tapered conical pipe opening at the front end of said sleeve; and the rear end slightly extends outside the rear edge surface of the external pipe.  
     
     
         2 . A muffler structure at the rear end of an exhaust pipe as claimed in  claim 1 , wherein the front end of said external pipe being mounted to a gas-receiving pipe with a French connector, and the diameter of the opening of the gas-receiving pipe is smaller than the diameter of the opening at the front end of the inner pipe.  
     
     
         3 . A muffler structure at the rear end of an exhaust pipe as claimed in  claim 1 , wherein the external wall of said external pipe proximate to an appropriate position at its rear end being soldered with an n-shaped fixing bracket.  
     
     
         4 . A muffler structure at the rear end of an exhaust pipe as claimed in  claim 1 , wherein the rear edge surface of said external pipe being coupled to a decorative lid, and the center of said decorative lid forming an diverging conical hole, and a ringed groove being disposed in an appropriate depressed position of the decorative lid, and the ringed groove having a penetrating hole, thereby a screw being mounted to the soldered nut at the rear edge of the external pipe.