Patent ID: 8262375

Claim:
A rotor for a tube pump comprising: a rotor element; a plurality of first swing portions, each first swing portion having a base portion supported rotatably by the rotor element about an axis defined by a shaft disposed on the rotor; a plurality of arm-shaped second swing portions, each second swing portion corresponding to a first swing portion and having a base end supported rotatably by the corresponding first swing portion about an axis defined by a swing shaft; wherein each second swing portion has a roller supported rotatably on a free end thereof; a plurality of first buffer members, each first buffer member inserted between a first side surface of each second swing portion and a receiving plate mounted on the rotor element; a plurality of second buffer members, each second buffer member inserted between a second side surface of each second swing portion and a receiving plate mounted on the corresponding first swing portion; wherein each second swing portion is biased in opposite directions by corresponding first and second buffer members, each second swing portion being suspended therebetween; and wherein a resilient tube is squeezed by at least one of the rollers when the rotor element is rotated in a normal counter-clockwise direction or a reverse clockwise direction, so that liquid in the resilient tube is transferred.