Patent ID: 8555850

Claim:
A piston assembly for an engine of a vehicle, the piston assembly comprising: an annular body having an outer side surface defining a groove; and a ring assembly disposed within the groove, the ring assembly including: a first compression ring including a first ring outer face defining an outer first ring diameter; and a second compression ring overlaid adjacent the first compression ring and including a second ring outer face defining an outer second ring diameter; wherein the outer second ring diameter is larger than the outer first ring diameter when both the first compression ring and the second compression ring are disposed in a radially uncompressed condition; and wherein the first compression ring includes a first ring cut defining a first ring gap extending radially across the first compression ring, and the second compression ring includes a second ring cut defining a second ring gap extending radially across the second compression ring, wherein the second ring gap is larger than the first ring gap when both of the first compression ring and the second compression ring are disposed in the radially uncompressed condition.