PLUNGER END STOP AND ANTI-ROTATION ELEMENT FOR MEDICAL SYRINGE

Abstract

A medical syringe system comprising a cylindrical barrel, plunger, and plunger end stop. The plunger is configured for moving axially inside the barrel to increase and decrease the internal volume of the barrel. The end stop is configured for preventing unintended extraction of the plunger from the barrel and for rotationally coupling the plunger to the barrel throughout the entire length of travel of the plunger inside the barrel. In one embodiment, the plunger end stop comprises a two-piece assembly that fits completely around the exterior circumference of the barrel with four prongs that extent through apertures in the barrel to engage with a minimum of two ribs of the shaft of the plunger.

CPC Classifications