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Peristaltic pump with rigid fluoroplastic tubing

  • US 5,482,447 A
  • Filed: 05/24/1995
  • Issued: 01/09/1996
  • Est. Priority Date: 08/05/1994
  • Status: Expired due to Term
First Claim
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1. A peristaltic pump for transporting fluids, said peristaltic pump comprising(a) a pump housing containing a pumptube passageway;

  • (b) a pumptube having inlet and outlet ends extending outside the pump housing, a pumping section contained within the pumptube passageway, and a fluid passageway extending through the pumptube from the inlet end to the outlet end; and

    (c) a plurality of pressure rollers rotatably mounted within the housing, whereby each roller in turn contacts and compresses the pumping section of the pumptube contained within the pumptube passageway so as to transport fluid from the inlet end to the outlet end of the pumptube;

    wherein at least the pumping section of the pumptube comprises an inner tube contained within an outer tube, wherein the inner tube is a first rigid fluoroplastic tubing and the outer tube is a second rigid fluoroplastic tubing such that the outside diameter of the inner tube and the inner diameter of the outer tube are closely matched, and wherein the pumptube is preformed to fit within 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 contact and compress the pumping section of the pumptube essentially along the flattened side of the oval-like shape and wherein the pumping section of pumptube returns to its flattened, oval-like shape when not compressed by the pressure rollers.

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