| 摘要 |
<p>A dispensing apparatus comprising a rigid chamber divided into two elastic dispensing chamber 1.13, 1.14 by a deformable liquid-filled partition chamber 1.2 defined between two diaphragms 1.3, 1.4. Inlet ducts 1.15 and 1.16 controlled by valves 1.21, 1.22 lead to the elastic chambers and outlet ducts 1.19, 1.20 controlled by valves 1.23, 1.24 leave the chambers. By controlling valves 1.21 and 1.24 together and valves 1.22 and 1.23 together, the dispensing chambers are alternatively filled and emptied, each dispensing a dose of fluid having a volume equal to the combined volume of the elastic chambers This combined volume can be varied by positioning an adjusting piston 1.6 in an adjusting cylinder 1.9. The apparatus may be a disposable module for clinical use. The inlet and outlet valves may be the membrane type. The apparatus can be converted for active dispensing by connecting one chamber to a pump. <IMAGE></p> |
