Patent ID: 8337173

Claim:
An electric oscillating drive comprising: an actuator generating periodic force pulses with a small motion amplitude, the actuator including one of a piezo actuator and an oscillating armature magnet; an oscillating system, which is driven, in an oscillating manner with an adapted natural frequency, in a preset plane and which has at least one oscillating arm performing oscillating motions with a resonant mass and with a balance arm; a coupling member of the balance arm; a working member of a pump working device, the balance arm being in a mechanical driving connection via the coupling member of the balance arm with the working member of the pump working device, which said working member is to be driven in said oscillating manner; a frame part; a control arm; a driving lever, the at least one oscillating arm being fastened to the control arm and to the driving lever, the driving lever and the control arm forming two levers of unequal length, wherein at least the control arm is flexurally elastic at least over some sections and has an end not connected to the at least one oscillating arm that is immovably connected to the frame part, to which the actuator is mounted, at a point located remotely from the at least one oscillating arm, and wherein the driving lever is connected to the actuator in a motion-transmitting manner such that the force pulses of the actuator are sent to the at least one oscillating arm to generate pendular oscillating motions thereof, said pendular oscillating motions being transmitted to the at least one balance arm for driving said working member through the coupling member in the preset plane.