Patent ID: 6918359
Filing Date: 2005-07-19
Classification: F02B

Abstract:
1. A portable, manually-guided implement, comprising: an internal combustion engine having a cylinder with a combustion chamber having an exhaust gas outlet, wherein said combustion chamber is delimited by a piston that drives a crankshaft that is rotatably mounted in a crankcase, wherein a cylinder plane, which contains a cylinder axis, approximately divides said exhaust gas outlet, wherein a respective transfer channel is provided on opposite sides of said cylinder plane and each connects said crankcase with said combustion chamber, wherein a first end of each transfer channel opens into said combustion chamber via an inlet window, and a second end thereof is open towards said crankcase, wherein both of said transfer channels are connected to an air duct that supplies essentially fuel-free combustion air, wherein a carburetor is provided and has a flow channel which, upstream of a butterfly valve therein, is connected to a clean chamber of an air filter, and, downstream of said butterfly valve, is connected to an intake channel of said engine, wherein a housing wall is disposed between said carburetor and said cylinder, wherein said housing wall is part of a housing of said implement and separates said carburetor from said cylinder, and wherein a duct section of said air duct is formed in said housing wall as a rigid duct.