×

Safety back-up for metering pump control

  • US 4,839,571 A
  • Filed: 03/17/1987
  • Issued: 06/13/1989
  • Est. Priority Date: 03/17/1987
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system for detecting undesirably large variance in a precision meter used to measure the flow of fluid from a pump, the system comprising:

  • a fluid supply vessel for containing a fluid;

    a deposit area to receive fluid from the supply vessel through a conduit;

    a pump associated with the conduit to pump fluid from the supply vessel and through the conduit to the deposit area;

    a precision meter associated with the conduit to measure the flow of fluid through the conduit;

    pump sensing means communicating with the pump for sensing the volume of fluid pumped by the pump; and

    computer means communicating with the pump sensing means and with the meter, the computer means capable of comparing information regarding the volume of pumped fluid measured and the flow of fluid through the meter;

    wherein the computer means will detect and signal if variance between the pumped volume of fluid and the flow of fluid measured by the meter exceeds a predetermined amount.

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