Patent ID: 9291159
Filing Date: 2016-03-22
CPC Classification: F04B

Claim Text:
1. A roller assembly comprising: a central section with a hub, the central section having a plurality of pivots located around the central section and the roller assembly rotating about the hub on a rotation axis of the hub, wherein the plurality of pivots are located around a periphery of the central section: a plurality of arms, each arm having a roller end and a pivot end, the pivot ends coupled to the central section at the plurality of pivots such that each arm is capable of pivoting independently with respect to the central section, the roller ends and pivot ends of each arm located a distance of at least one roller width away from each other; a plurality of rollers, one roller coupled to each of the roller ends of the plurality of arms, wherein the rollers are located interior the periphery of the central section: wherein the plurality of rollers and arms are located around the central section such that the pivot is located a distance away from the roller; and wherein a rotational axis of each roller is perpendicular to the rotation axis of the hub.