Patent ID: 11959412
Assignee: CUMMINS INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 6:
7. A piston assembly for an internal combustion engine, the piston assembly comprising:
a piston that is movable along a cylinder bore of the internal combustion engine, the piston including an upper portion and a lower portion, the upper portion of the piston including a crown facing the cylinder bore; and
a piston pin extending along a longitudinal axis transversely to the piston, the piston pin being coupled to the piston below the crown, wherein the piston pin includes an outer surface extending around the longitudinal axis and a flat surface with opposite sides extending a length of the piston pin along the longitudinal axis, the outer surface having a non-circular shape from one side of the flat surface and from an opposite side of the flat surface to a first portion of the outer surface opposite the flat surface so that gaps for receiving fluid are created between the piston pin and the upper portion of the piston in response to the piston moving along the cylinder bore.