Patent ID: 8613376

Claim:
A device for dispensing a dental material, comprising: a plunger for extruding at least a component of the dental material from a container; a first motor cooperating with the plunger; a first electric circuit which is adapted for powering the first motor to advance the plunger forward for extruding the material component; a second electric circuit which is adapted for powering the first motor to retract the plunger backward from the material; a selector switch which is adapted to alternately select the first electric circuit or the second electric circuit for powering the motor; a first switch which is arranged within the first electric circuit and being adapted to interrupt the first electric circuit when the plunger is positioned at a forward position; a second switch which is arranged within the second electric circuit and being adapted to interrupt the second electric circuit when the plunger is positioned at a backward position, wherein the backward position is a predetermined relative position from a variable starting position from which the plunger is retracted; and a piston, the piston and the plunger being movable relative to one another between a first positional limit and a second positional limit along an axis on which the plunger is advanced or retracted, wherein the device is further adapted such that in the second positional limit the second switch is triggered to close.