| 摘要 |
A precision reagent metering and delivery device includes an externally threaded, disposable liquid reagent container (62) threadably receivable within an internally threaded base (60). The top wall of the container has a fluid passageway (73) connected to a fluid delivery tube (84). A plunger (76) is axially slidable in the container and is coupled to a stator (66) carried by the base. Rotation of the base (60) via a drive (M, 94, 90) relative to the container (62) screws the container down into the base, causing precisely predeterminable axial advance of the plunger (76) within the container, whereby the reagent within the container will be controllably forced out the delivery tube (84) in precisely determinable amounts. The base (60) is divided in its axial direction, and comprises two base portions (60a, 60b) which may be swung about a pivot (70) between a closed position in which the threads of the container and base are engaged, to an open position in which the threads are disengaged to permit a spent container to be quickly discarded. |
