MONOSTROKE SYRINGE PUSHER FOR AUTOMATIC PARENTERAL INJECTIONS WITH SERVO-CONTROL AND PROGRAMMING

摘要

Monostroke syringe-pusher for ambulatory medicinal injections with self-contained electric supply by means of rechargeable batteries of a motoreducing system which drives a coaxial worm screw. This worm screw actuates a carriage which provides for the translation of the syringe piston. The assembly is contained in a substantially sealed rigid envelope which also provides for the guiding of the carriage. The rotation angle of the worm screw corresponding to the delivery of the unit volume is controlled by two servo-control loops. The delivery rate of boluses is controlled by a programming unit and/or a clock. An excessive pressure or a continuous inadvertent operation of the motoreduction unit sets the irrevocable backward return of the device together with a sound alarm.