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Apparatus and method for dispensing user-specified fixed volumes of liquids

  • US 9,174,834 B2
  • Filed: 06/24/2013
  • Issued: 11/03/2015
  • Est. Priority Date: 09/20/2010
  • Status: Active Grant
First Claim
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1. An apparatus for dispensing user-specified volumes of liquid from a container, the apparatus comprising:

  • a computer operatively connected to an electrically-actuable pinch valve, the computer causes the electrically-actuable pinch valve to open for a length of time required to dispense a user-specified volume of liquid from the container, which is coupled to a container discharge tube, the container discharge tube being opened and closed by operation of the pinch valve, the volume of liquid to be dispensed being selectable by a user from a. plurality of different volumes of liquid to dispense, the length of time required to open the pinch valve for a user-selected volume being determined by the computer evaluating a polynomial having coefficients, the coefficients of the polynomial operating on a value representative of a signal obtained by the computer from a sensor coupled to the container, wherein the container has weight and wherein the signal from the sensor represents only a portion of the weight of the container and its contents.

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