| 主权项 |
1. An automated high-precision plunger pump for volumes of less than 1 microliter, comprising
a housing, a motor, a handwheel, a clutch, and a pump head and two drive trains comprising a threaded spindle and spindle nut, the pump head comprising a working chamber with a common or separate inlet and outlet opening, the plunger pump comprising a movable plunger configured to be introduced axially into the working chamber so as to alter the volume thereof, wherein the threaded spindle and spindle nut are arranged in threaded engagement, wherein the plunger is axially movable by the threaded spindle or the spindle nut, wherein the threaded spindle nut is configured to be rotationally lockable with the aid of the clutch, wherein the spindle nut is engagement with the motor and is rotationally driven by it, and wherein the handwheel is provided at the end of the threaded spindle remote from the plunger to manually drive the plunger pump, wherein the threaded spindle can be mechanically decoupled from the spindle nut, wherein the threaded spindle can rotate independent of the spindle nut and the spindle nut can rotate independent of the threaded spindle, wherein the clutch in normal operation prevents a rotation of the handwheel and the threaded spindle, and wherein either the plunger is co-rotatingly connected in a torsionally rigid manner to the threaded spindle or the plunger is connected to the spindle nut via a roller bearing. |
