Patent ID: 8881520

Claim:
A roller bearing sub-assembly, comprising: a first mounting portion; a second mounting portion spaced apart from the first mounting portion; a roller having a circumference and an axial length, and disposed between the first and second mounting portions; a plurality of straps disposed along the axial length of the roller, each of the straps having opposite ends, the plurality of straps connecting the first and second mounting portions to the roller; at least three of the plurality of the straps anchored at one opposite end to the roller; and at least one of the plurality of the straps wrapped over the roller without being anchored thereto, and anchored at one opposite end to the first mounting portion and anchored at another opposite end to the second mounting portion; wherein the configuration of the first mounting portion, the second mounting portion, the roller, and the straps permit relative movement of the first and second mounting portions along a linear distance substantially equal to the circumference of the roller.