| 摘要 |
<p>A peristaltic pump (10) for pumping liquids through a resilient tube (58). One embodiment of the pump includes a curved concave platen (26) against which the resilient tube is placed. In a second embodiment, the pump is a linear pump having a generally planar platen (80). In the first and second embodiments a lobe cam (30) is positioned adjacent to the platen and tube. A plurality of pump fingers (48) are mounted between the tube and cam in a manner permitting radial movement of the pump fingers in the first embodiment and linear movement in the second embodiment. The lobe end presses the tube sufficiently to occlude the tube and prevent back flow without ever pressing and damaging the tube. A transverse pinch finger (66) is provided on each pump finger, extending from the tube pressing face of each pump finger. At the tube occluding position, the pump finger nearly occludes the tube and the pinch finger completes occlusion without pressing the tube beyond the fully occluded position.</p> |
