Patent ID: 6955043

Claim:
A muffler assembly for an internal combustion engine of a portable handheld work apparatus, the engine having a cylinder and an exhaust-gas stub and the muffler assembly comprising: an exhaust-gas muffler having a muffler housing including first and second half shells connected substantially fluid tight to each other and said first and second half shells conjointly defining an interior space; said muffler housing further including a partition wall partitioning said interior space into first and second chambers; an exhaust-gas inlet opening into said interior space and being connected to said exhaust-gas stub of said engine; an exhaust-gas outlet for conducting exhaust gas out of said interior space, wherein said exhaust-gas outlet is defined by a plurality of outlet openings; and, wherein said exhaust-gas muffler includes a plurality of resonance tubes disposed forward of corresponding ones of said outlet openings as seen in flow direction of the exhaust gas.