Patent ID: 7597679

Claim:
A safety system for an electrically driven medical delivery device for delivering a dose of a medicament, wherein the safety system is configured for preventing delivery of an erroneous dose of the medicament and comprising: at least one detector, said safety system comprising: at least two control circuits wherein a communication connection is provided between the control circuits, each configured for independently controlling a power supply to a driving means of the delivery device which is configured to deliver a dose of medicament, and the at least one detector connected to each control circuit, each detector being arranged in a different place along a mechanical transmission path of the delivery device, and each detector being arranged for separately detecting a mechanical parameter of delivering the dose of medicament and for emitting a signal to its respective control circuit, wherein each detector and its respective control circuit is arranged to operate the driving means of the delivery device independently from each other detector and its respective control circuit, wherein during injection the at least two control circuits monitor time and a mechanical parameter of the at least one detector, whereby at least one of the at least two control circuits disable the driving means if the time or mechanical parameter exceeds an expected value indicative of a nominal dose of a medicament, thereby preventing delivery of an erroneous dose of medicament.