Patent ID: 6464018
Filing Date: 2002-10-15
Classification: B23B

Abstract:
A portable handheld drilling machine defining a longitudinal axis and said portable handheld drilling machine comprising:an internal combustion engine having an engine block and a crankshaft; a transmission housing accommodating a transmission therein; said transmission having an input shaft driven by said crankshaft and having an output shaft accommodating a chuck thereon; said crankshaft having an end facing away from said transmission; an engine housing for accommodating said engine therein and said engine housing having a housing spiral formed therein; a cooling air blower mounted on said end of said crankshaft for moving cooling air though said engine housing via said spiral; said engine including a cylinder, crankcase, carburetor and exhaust-gas muffler and said engine housing surrounding said cylinder, said crankcase, said carburetor and said exhaust-gas muffler; said engine housing having a handle formed thereon for holding and guiding said machine; said engine housing having a front end and a rear end in the direction of said longitudinal axis; said engine housing being open in said front and rear ends; said transmission housing being attached to said engine block; said transmission housing projecting in the direction of said longitudinal axis through said front end with a peripherally extending play (v); said housing spiral being disposed in said rear end with a peripherally extending play (u); and, said engine housing having a handle formed thereon for holding and guiding said machine and said handle extending bridge-like over said rear end of said engine housing.