| 摘要 |
A peristaltic pump is provided with drive gear mechanisms so that the pump rollers are respectively driven about their support axes in a rotatable direction opposite to that in which the support discs are driven. The result is that a forward motion is applied to fluid within the pump tubing while an opposite or rearward motion is applied to the tubing itself. The rate of the rearward motion may be controlled to be at least as great as, or greater than, the rate of the forward motion. The result is a reduction in the stretching forces otherwise applied to the consumable or replaceable length of pump tubing through which fluids are driven. The benefits from such result are increased life (i.e., usage time) for the length of pump tubing before it must be replaced, and simultaneously improved fluid delivery rate accuracy for a longer period of time as compared to the loss of accuracy which otherwise occurs due to tube stretching. Applying such methodology successfully improves tube life and enhances fluid delivery rate accuracy regardless of the type of tube material utilized, and regardless of the relative speed of operation (for example, high or low) of the pump.
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