Patent ID: 7240584

Claim:
An engine cylinder piston and connecting rod assembly comprising: a piston; a connecting rod; a single piston pin constructed and arranged for connecting together said piston and said connecting rod, said single piston pin being subjected to a load during reciprocation of said connecting rod, resulting in piston pin deflection; and wherein said connecting rod having a first portion assembled into said piston and defining a bore for receipt of said piston pin, said connecting rod having a first end and an opposite second end, said bore extending between said first end and said second end, said bore including a generally cylindrical bore portion, said connecting rod including as part of said bore a first profiled bore section adjacent said first end and a second profiled bore section adjacent said second end, said generally cylindrical bore portion being positioned between said first and second profiled bore sections, each of said first and second profiled bore sections being constructed and arranged with a size, shape, and location so as to approximate the deflection shape of said single piston pin under load.