Patent ID: 8863705

Claim:
A hand-held power tool comprising: a two-stroke engine comprising a cylinder with a combustion chamber and a piston disposed in said cylinder and delimiting said combustion chamber; said two-stroke engine comprising a crankcase and a crankshaft that is rotatably supported in said crankcase and driven in rotation by said piston, wherein in at least one position of said piston said crankcase is connected by a transfer passage to said combustion chamber; said two-stroke engine comprising an air passage for supply of combustion air and a mixture passage for supply of fuel/air mixture, wherein said air passage and said mixture passage in operation are at least partially connected to each other; said two-stroke engine comprising a carburetor, wherein a section of said mixture passage is formed in said carburetor and wherein in said carburetor at least one fuel port is provided that opens into said mixture passage; wherein said piston has at least one piston recess for connecting said air passage and said transfer passage; wherein said air passage in at least one position of said piston supplies combustion air to said transfer passage; wherein said mixture passage has a mixture inlet and opens into said crankcase with said mixture inlet that is piston-controlled by said piston; wherein said mixture inlet has a total width extending in a circumferential direction of said cylinder, wherein, upon upward stroke of said piston, said mixture inlet is connected to said crankcase with only a portion of said total width before a connection of said air passage to said transfer passage is established, wherein said portion of said total width is 10% up to 80% of said total width.