Patent ID: 8418805

Claim:
A muffler for a vehicle comprising: an inner casing, wherein an inner space of the inner casing is divided by a plurality of baffles to form a plurality of chambers, the inner casing having an entrance defined in one end and an exit defined in the other end, the entrance and the exit communicating with each other; an insulator surrounding a contour of the inner casing; and an outer casing surrounding a contour of the insulator, the outer casing being made of synthetic resin, wherein the inner casing comprises a plurality of covers that are assembled together, portions of the covers that abut against each other are fixed to each other by welding, wherein the inner casing comprises: an upper cover provided on an upper front portion thereof, a lower cover fixed to a lower portion of the upper cover, an upper rim of the lower cover having a shape that is the same as that of the lower rim of the upper cover; a middle cover fixed to a respective rear end portion of the upper cover and the lower cover, a front rim of the middle cover having a shape that is the same as that of a respective rear rim of the upper cover and the lower cover; and an end over fixed to a rear end of the middle cover, a front rim of the end cover a shape that is the same as that of a rear rim of the middle cover.