Patent ID: 6494693
Filing Date: 2002-12-17
Classification: F04B,F05C

Abstract:
A peristaltic pump for transporting fluids, said peristaltic pump comprising:(a) a pump housing containing a pumptube passageway for receiving a pumptube having inlet and outlet ends extending outside the pump housing; (b) a plurality of pressure rollers rotably mounted within the pump housing to in turn roll along a pumping section of the pumptube so as to transport fluid from the inlet end to the outlet end of the pumptube; (c) guide cams attached to the pump housing at respective ends of the pumping section for guiding the inlet and outlet ends of the pumptube out of the pump housing; (d) and an inelastic strap biased against the guide cams and the pressure rollers along the pumping section of the pumptube to prevent excessive expansion of the pumptube between the pressure rollers at the outlet end when exposed to a counter pressure; wherein at least the pumping section of the pumptube comprises a single rigid fluoroplastic tubing preformed to fit within the pumptube passageway such that the pumptube within the pumping section is flattened into an oval-like shape with an oval-shaped fluid passageway such that the pressure rollers compress the pumping section of the pumptube essentially along the flattened side of the oval-like shape without contacting the pumping section.