×

Positive displacement pump with pressure compensating calibration

  • US 10,036,378 B2
  • Filed: 02/28/2013
  • Issued: 07/31/2018
  • Est. Priority Date: 02/28/2013
  • Status: Active Grant
First Claim
Patent Images

1. A method of dispensing a target volume of a fluid from a diaphragm pump assembly the method comprising:

  • sensing whether a shaft coupled to a diaphragm of the diaphragm pump assembly has reached an end-of-stroke position using a stroke sensor to generate a stroke signal;

    identifying, on a controller of the diaphragm pump assembly, whether the shaft is at the end-of-stroke position using the stroke signal generated by the stroke sensor;

    sensing a back pressure at a fluid outlet of the diaphragm pump assembly using a pressure sensor disposed at the fluid outlet;

    determining, on the controller, whether a total volume of fluid pumped has reached the target volume;

    actuating a solenoid valve, in response to identifying that the shaft is in the end-of-stroke position and that the total volume of fluid pumped by the diaphragm pump assembly has not yet reached the target volume, to cause a motive fluid to be supplied to the diaphragm such that the shaft moves from the end-of-stroke position; and

    concluding movement of the shaft in response to the controller determining that the total volume of pumped fluid has reached the target volume.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×