US 11,913,817 B2
Fluid metering device with reduced cross contamination
William D. Dunfee, Newark, DE (US); Robert Hopely, Jr., Tombstone, AZ (US); Colin Ingersoll, Wilmington, DE (US); and Yudis Moreta, Bear, DE (US)
Assigned to Siemens Healthcare Diagnostics Inc., Tarrytown, NY (US)
Appl. No. 18/002,473
Filed by Siemens Healthcare Diagnostics Inc., Tarrytown, NY (US)
PCT Filed Jun. 24, 2021, PCT No. PCT/US2021/039013
§ 371(c)(1), (2) Date Dec. 19, 2022,
PCT Pub. No. WO2021/263063, PCT Pub. Date Dec. 30, 2021.
Claims priority of provisional application 62/705,433, filed on Jun. 26, 2020.
Prior Publication US 2023/0194323 A1, Jun. 22, 2023
Int. Cl. G01F 15/00 (2006.01); G01F 11/12 (2006.01); G01F 15/12 (2006.01); G01F 15/18 (2006.01)
CPC G01F 15/005 (2013.01) [G01F 11/12 (2013.01); G01F 15/12 (2013.01); G01F 15/18 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A fluid metering device, comprising:
a first fluid supply port for receiving a first fluid;
a first fluid dispense port for dispensing the first fluid;
a second fluid supply port for receiving a second fluid;
a second fluid dispense port for dispensing the second fluid;
a waste discharge port for discharging a mixture of the first fluid and the second fluid;
a metering pump for measuring a volume of each fluid;
a valve assembly including a plurality of valves, wherein the valve assembly is used for directing the first fluid from the first fluid supply port to the first fluid dispense port, directing the second fluid from the second fluid supply port to the second fluid dispense port, and directing the mixture to the waste discharge port, wherein the valve assembly includes a first valve connected to the first fluid supply port and the metering pump, a second valve connected to the first fluid dispense port and the metering pump, a third valve connected to the second valve and the waste discharge port, and a fourth valve connected to the third valve, the second fluid supply port and the second fluid dispense port;
a manifold connected to the metering pump, wherein the manifold includes a plurality of fluid channels, and the manifold is used for communicating between the valve assembly and each port;
a first tube connected between the second valve and the third valve for accommodating the mixture or the first fluid, wherein the first tube is configured to prevent the second fluid from reaching the second valve; and
a second tube connected between the third valve and the fourth valve for accommodating the second fluid, wherein the second tube is configured to accommodate a required amount of the second fluid.