Patent ID: 6318243
Filing Date: 2001-11-20
Classification: F02F,F05C,F16J

Abstract:
A piston for use in a cylinder of an internal combustion engine having a piston rod, with a pin receiving opening therein, and a pin for insertion into the pin receiving opening, said piston comprising:a piston crown comprising:a top portion having an inner surface wherein said inner surface has a plurality of depressions, each depression extending partially, but not fully, through the inner surface of the piston crown thereby increasing the surface area of said inner surface and the rate of heat dissipation from said inner surface and decreasing the weight of said piston crown;a cylindrical rim extending from said top portion; anda pair of pin bosses disposed at least partially within said rim and extending from said inner surface, each of said pin bosses having an opening formed therethrough for receiving an end of the pin.