Patent ID: 8535267

Claim:
A syringe, comprising: a barrel having a proximal end and a distal end, and an interior surface defining a cavity configured as a fluid transfer device a plunger disposed in the barrel and configured to advance toward the barrel distal and proximal ends; a needle stem disposed in the barrel distal end; a needle assembly selectively coupled to the needle stem and configured to deliver a fluid upon advancement of the plunger toward the barrel distal end; and wherein the barrel interior surface comprises a segmented retaining ledge at the barrel distal end configured to secure the needle stem distal of the segmented retaining ledge, wherein the segmented retaining ledge comprises a plurality of members extending inwardly from the barrel interior surface with a space defined between each of the members, wherein the needle stem includes a retaining ring disposed annularly thereabout, wherein the segmented retaining ledge is configured to reduce an engagement force of the plunger necessary to separate the retaining ring from the needle stem.