Patent ID: 7789782

Claim:
A silent chain comprising link plates each having a pair of pin holes and a pair of teeth, the link plates being disposed in interleaved widthwise rows along the length of the chain, the rows being flexibly connected to one another by connecting pins extending through said pin holes, whereby the link plates of each row are pivotable relative to the link plates of an adjacent row interleaved therewith, wherein at least one link plate in one widthwise row has a side surface facing a side surface of an adjacent link plate in a row of link plates interleaved with, and pivotable relative to, the link plates of said widthwise row, and includes an annular protrusion coaxial with a pin hole therein, the protrusion being in contact with said adjacent link plate, and an annular recess in said side surface of said at least one link plate, said annular recess being coaxial with and adjacent said annular protrusion, in which said annular recess is located radially inward with respect to said annular protrusion, in which said side surface of said adjacent link plate also includes an annular protrusion coaxial with a pin hole therein and an annular recess adjacent, and coaxial and radially inward with respect to, said annular protrusion of said adjacent link plate, said annular protrusions being coaxial with and in contact with each other, and said annular recesses together forming an annular oil reservoir.