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Roller pump rotor with integral spring arms

  • US 4,184,815 A
  • Filed: 03/14/1977
  • Issued: 01/22/1980
  • Est. Priority Date: 03/14/1977
  • Status: Expired due to Term
First Claim
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1. A fluid pump comprising a base, an upstanding wall on said base, a rotor rotatably mounted on said base, drive means for rotating said rotor, said rotor being formed from a plastic material in a generally circular shape in its plan view with an outer wall generally parallel to and spaced from said upstanding wall to define a tube containing path therebetween, a resilient tube fixedly disposed in said path, said rotor containing at least one integral spring arm formed therein by removing material from the generally circular rotor in the form of an arcuate slot extending inwardly from the periphery of said rotor along a path substantially parallel to the periphery of the rotor, a roller mounted on said spring arm and disposed at least partially in said path for making depressing contact with the resilient tube for forcing fluid through the tube as said rotor is rotated by said drive means, and said integral spring arm being sufficiently resilient to accommodate any back pressure developed in the tube.

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