Patent ID: 8205591

Claim:
A piston ( 10 ) for an internal combustion engine, having a piston head ( 11 ) and a piston skirt ( 16 ) with pin bosses ( 17 ), which are each provided with a pin bore ( 18 ) for accommodating a piston pin, wherein the pin bosses ( 17 ) form a trapezoid-shaped support, in which inner surfaces ( 19 ) of the pin bosses ( 17 ) form an acute angle (α) relative to a center axis (M) of the piston, wherein each pin bore ( 18 ) is configured as a shaped bore that is widened at least in its inner region, in such a manner that the widening becomes larger in a direction of an inner end ( 18 ″) of the pin bore ( 18 ), forming facets ( 120 , 220 ) which run around the complete inner surface of the pin bore ( 18 ), and wherein the facets ( 120 , 220 ) enclose an acute angle (α, β) relative to the center axis (M) of the piston.