Piston and rod assembly with displacement features

Claim 1

A piston and rod assembly including compression adjustment shims comprising a piston having a crown and skirt depending therefrom, a pin supported at its opposite ends by said piston, the support at each end comprising a separate pair of directly abutting bearing blocks with a hole therethrough for supporting the respective pin end, a plurality of shims between the uppermost bearing block and the crown, and a pair of screws extending through said bearing blocks and shims and threadingly engaged in said crown, a piston rod at one end thereof having means fitted onto said pin and at the other end of said rod defining a pair of spaced feet members, a crankshaft bearing assembly comprising a pair of directly abutting bearing blocks defining a crankshaft opening therethrough, the upper crankshaft bearing block defining a spaced pair of generally right angled shoulders defined by walls supporting a respective plurality of shims therein, said spaced pair of piston rod feet members respectively engaging both a wall of said spaced pair of crankshaft shoulders and said shims, and a pair of screws each respectively passing through said crankshaft bearing blocks and shims and threadingly engaging a respective one of said pair of feet members.