Patent ID: 7647863

Claim:
Piston pin bearing for pistons of an internal combustion engine, having pin bores ( 2 ) in which a piston pin is mounted, whereby the pin bores have a mantle surface ( 2 . 1 ) having a highly oval shape in extending over a region delimited by the pin boss equator—pin boss zenith—pin boss equator, and a mantle surface ( 2 . 2 ) having a circular-cylindrical shape extending over a region delimited by the pin boss equator—pin boss nadir—pin boss equator, whose mantle lines ( 3 , 4 ) running in the nadir and the zenith are oriented parallel to one another, wherein the mantle line ( 3 ) of the highly oval mantle surface running in the pin boss zenith runs at an incline relative to the pin boss axis (X) on the piston side, from radially outside to radially inside, at an angle (b), in such a manner that the greatest ovality defined by its oval diameter occurs at the inner ends ( 7 ) of the pin bores, in each instance, and does not exceed a predetermined value of the oval diameter.