Patent ID: 7708115

Claim:
A muffler for an internal combustion engine comprising: (a) a housing having an inlet end with an inlet opening formed for a flow of exhaust gases into said housing and an outlet end with an outlet opening formed for a discharge of exhaust gases from said housing; (b) at least a first chamber, an intermediate and a last chamber sequentially arranged within said housing, said intermediate chamber containing a deflection element chosen from a group including: (i) a hollow pyramid; and (ii) a dome-shaped partition; (c) a non-perforated pipe passing longitudinally from said inlet opening through said first chamber so as to open only at its downstream end solely into said intermediate chamber, thereby directing said exhaust gases toward said deflection element; and (d) a perforated pipe extending through said last chamber, said perforated pipe having an upstream opening into said intermediate chamber and configured to channel said exhaust gas to said outlet opening.