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Infusion solution injecting pump

  • US 4,299,541 A
  • Filed: 11/28/1978
  • Issued: 11/10/1981
  • Est. Priority Date: 11/29/1977
  • Status: Expired due to Term
First Claim
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1. An infusion solution injecting pump device comprising pump means, timer control means, step data input means, memory means, volume data input means, and pump control means, said volume data input means supplying solution infusion volume data to said memory means for storage, said memory means including shift registers for storage of said solution infusion volume data and a data latch circuit, said step data input means providing a step data signal of solution infusion pattern to said timer control means as a controlling signal, said timer control means including a timer oscillator for generating a given timer signal, a frequency converter for converting said timer signal into a pulse signal having a frequency proportional to the step data and a frequency demultiplier for demultiplying the frequency of the pulse signal, said memory means transmitting the volume data stored in the memory successively to the data latch circuit under the controlling signal from the timer control signal cooperating with said controlling signal to supply said volume data to said pump control means in the event the injecting volume of said pump changes, said pump control means including a motor and said pump control means converting volume data signal into a motor driving signal, and said timer control means and said pump control means responding to start and stop signals in the device.

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