| 摘要 |
<p>A liquid dispensing cartridge pump suitable for dispensing reagent in an automatic system includes a compressible metering chamber (13) suspended from a reservoir bag mounted within a rigid housing. Check valves between the reservoir and metering chamber and at a lower end of a metering chamber are formed of flexible membranes (15, 25) having apertures which close against conical projections on rigid disks (17, 18). The reservoir and metering chamber (13) pivot as a compression member (12) squeezes the metering chamber (13) against a back surface.</p> |
