| 摘要 |
1. Dosing device for liquids, by which measured volumes are received or delivered singly or severally in timed succession, consisting of a housing (1502), which is divided by the packing of a piston (1504) into two chambers separate from one another, of which one is filled with the dosing liquid or is in communication with a vessel which is filled with the dosing liquid, and of a spindle system, which comprises a spindle (401; 1516) and a spindle nut (402; 1518) engaging with the latter, the housing being connected to the spindle and the piston to the spindle nut or the housing being connected to the spindle nut and the piston to the spindle, and the piston is displaceable in the housing with a displacement of the spindle relatively to the spindle nut, characterised by an annular latch mechanism which can be actuated by way of a handwheel (408; 1508) and/or a shift lever and which is rotatable both clockwise and anti-clockwise, the annular latch mechanism being connected directly or indirectly to the spindle or to the spindle nut and the spindle advance being devided by the annular latch mechanism into defined sections, the lengths of which are proportional to the angle of rotation which two latches (latch ring 413; 1509) or two stops (1002; 1003) of the annular latch mechanism assume in relation to one another. |
