Patent ID: 8177531

Claim:
A fluid transportation apparatus, comprising: an elastic tube; a tube frame including a tube guide groove to which the elastic tube is attached such that the elastic tube forms a circular arc; a cam driving wheel including a rotation center inside the circular arc of the elastic tube; a first cam fixed to and rotatable with a center shaft of the cam driving wheel; a second cam rotatably supported by the center shaft of the cam driving wheel, rotation of the second cam about the cam driving wheel being actuated through contact with the first cam during rotation of the first cam; and a plurality of fingers which radially extend from the rotation center between the elastic tube and the first and second cams, wherein: the first and second cams include at least a first condition in which the plurality of fingers release the elastic tube, and a second condition in which at least one of the plurality of fingers closes the elastic tube; and during the second condition, the first and second cams sequentially press the plurality of fingers, and the plurality of fingers sequentially repeat closure and release of the elastic tube from an inlet side to an outlet side of fluid.