Patent ID: 8323245

Claim:
An infusion device having safeguards for protecting a patient from inappropriate infusion during malfunction of an electronic controller, comprising: a pump; a transmission coupled to the pump; a motor coupled to the transmission to operate the pump; an electronic controller for automatically controlling the motor; and, a mechanical stop facility for stopping the pump by mechanically blocking the transmission from operating the pump when the motor is drivingly coupled to the pump, the mechanical blocking comprising mechanically blocking operating motion of the pump to thereby prevent the pump from generating fluid pressure and also thereby stop continued delivery of an infusion, wherein the mechanical stop facility during operation periodically requires resetting by the electronic controller to continue the infusion and thereby limits the amount of potential overdosing and wherein the mechanical stop facility comprises at least two locking members which alternatively block pump motion, and wherein the mechanical stop facility is reset by moving one of the locking members to disengage from positive locking engagement, which activates at least one other locking member so that the other locking member will block pump motion after a preset period.