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Peristaltic pulse pumping systems and methods

  • US 5,538,405 A
  • Filed: 07/01/1994
  • Issued: 07/23/1996
  • Est. Priority Date: 07/01/1994
  • Status: Expired due to Term
First Claim
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1. A peristaltic pumping apparatus comprisinga peristaltic pumping element including a pump rotor carrying a rotor for contacting a flexible tubing, and a drive mechanism for rotating the rotor, anda control mechanism coupled to the drive mechanism and a power source, the control mechanism being sequentially operative(i) in a continuous mode for controlling power to the drive mechanism to continuously rotate the pump rotor more than one complete revolution at a first angular velocity selected to achieve a first selected flow rate, and(ii) in an intermittent mode for controlling power to the drive mechanism to rotate the pump rotor in a series of pulses, each pulse having a preestablished first time period, during which the pump rotor rotates less than one complete revolution at a selected second angular velocity less than the first angular velocity and a preestablished second time period immediately following the first time period, during which rotation of the rotor ceases, the series of pulses providing a second selected flow rate less than the first selected flow rate.

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