Patent ID: 7305960
Filing Date: 2007-12-11
Classification: F16J

Abstract:
1. Piston ( 1 ) for an internal combustion engine, having a piston head ( 8 ) and having two piston pin bosses disposed on the side of the piston ( 1 ) facing away from the piston head ( 8 ), spaced apart from one another, each of which has a pin bore ( 2 , 3 ) having an inner region ( 7 , 7 ), a center region ( 6 , 6 ), and an outer region ( 5 , 5 ), whereby the inner region ( 7 , 7 ) is configured as a conically shaped profiled bore, and the center region ( 6 , 6 ) is configured as a circular cylinder, wherein the outer region ( 5 , 5 ) has a cross-section with an oval cross-sectional shape on one side, in the direction of the piston head ( 8 ), whereby the great axis of ovality lies at least approximately parallel to the piston axis ( 11 ), and whereby the degree of ovality increases from the border of the center region ( 6 , 6 ) to the outer end of the pin bore ( 2 , 3 ).