needle the catheter to tissue subcutis muscles fascia joint capsule bone or articular cavity there is no need of a separate procedure for drawing the liquid to the needle and a subsequent procedure for introducing the liquid into housing or the like moreover the device makes it possible to achieve flexibility in relation to the position of reservoir and patient and the other surroundings such that the positioning of the device with pivotable handle operated pump can be regulated with the intention of optimising the position for optimal effect and the least possible nuisance for patient and surroundings the pivoting handle is articulated on the device such that a lever action is established contributing to reduced exertion of force and simultaneously pivoting through a larger or smaller angle may be provided at the same time for increasing the precision of the injected amount of liquid a device where a larger pivoting angle is established will enable a certain dosing since a smaller volume is discharged by pivoting the pump grip through a given angle the device is furthermore characterised in that the pump piston is formed by a piston crown and the piston rod and that the pump chamber is formed between the piston crown on the pump piston and the outlet of the pump housing when transferring liquid from the reservoir to the hypodermic needle or a catheter for introducing into tissue a well defined volume can be established in the pump chamber particularly if the pump is of.