Patent ID: 7875005
Filing Date: 2011-01-25
Classification: A61M

Abstract:
1. An injection apparatus comprising a syringe barrel and a cylinder holder, the syringe barrel being mounted on the cylinder holder, the cylinder holder comprising a positioning mechanism installed therein and a flange insertion groove, the syringe barrel comprising: a flange held by said flange insertion groove so as to fix the syringe barrel, said flange having an inner perimeter and an outer perimeter; and a plurality of reinforcing ribs on a rear surface of the flange, said ribs arranged to extend from said inner perimeter to said outer perimeter of said flange wherein a concave portion is formed at an outer end of said ribs, said concave portion comprising a concave surface extending between adjacent ribs at outer ends thereof, said concave portion being configured to accept and engage with the positioning mechanism installed in the cylinder holder, and wherein the positioning mechanism engages with the concave portion from a direction from the outer perimeter of the flange toward the inner perimeter of the flange.