| 主权项 |
1. A peristaltic pump for flowing fluid through a lumen of a tube, the tube defining a diameter, the pump comprising:
a plurality of pistons linearly arranged adjacent to each other in a straight configuration, each of the plurality of pistons defining opposed first and second ends, each of the plurality of pistons traversable between extended and retracted positions; a plurality of lifters, each lifter being pivotable about a pivot axis; a platen disposed adjacent to the first ends of the plurality of pistons, the platen generally parallel to the plurality of pistons wherein a gap between the first end of one of the plurality of pistons and the platen is about equal to or more than a diameter of the tube when the piston is traversed to the retracted position and the gap is smaller than the diameter of the tube when the piston is traversed to the extended position; a rotatable cam shaft generally parallel to the plurality of pistons; a plurality of cams mounted to the rotatable cam shaft, each of the cams having a cam lobe, the cam lobes of the plurality of cams disposable adjacent to second end portions of the lifters with the second ends of the pistons positioned in between the second end portions of the lifters and the pivot axis of the lifters so that as the cam shaft rotates, the lobes raise the lifters which provide a mechanical advantage to traverse the pistons to the extended position, the plurality of cams are angularly displaced with respect to the adjacent cam, the plurality of pistons being sequentially traversed to the extended position to flow fluid through the tube.
|
