Patent ID: 7523820

Claim:
A rolling element chain comprising a belt assembly being resilient and having two parallel bars, and each parallel bar having an inner side; multiple supporting surfaces being formed continually on and along the inner side of the parallel bar, and each supporting surface of one parallel bar corresponding to one supporting surface of the other parallel bar and having two ends; and two rolling surfaces being opposite to one another and being perpendicular to the inner side of the parallel bar; and multiple clamping assemblies being formed between the parallel bars to form multiple roller holes on the belt assembly, wherein two adjacent clamping assemblies being formed respectively between the ends of corresponding supporting surfaces of the parallel bars, and each clamping assembly having multiple clamping protrusions being formed in a line between the parallel bars and alternately protruding oppositely away from the rolling surfaces of the belt assembly, and each clamping protrusion having a proximal end, wherein the proximal ends of adjacent clamping protrusions are adjacent to each other; a distal end being larger than the proximal end of the clamping protrusion, wherein the distal ends of the adjacent clamping protrusions protrude oppositely; a roller surface; and at least one apex, and each of the at least one apex being formed on the roller surface of the clamping protrusion from the proximal to the distal end and being formed by protruding two adjacent inclined surfaces from the roller surface of the clamping protrusion.