RATHORE, JAI HIND,RATHORE, BHARATI,RATHORE, PRATIBHA,RATHORE, NEELAM,RATHORE, BHUVAN CHANDRA
申请号：
ININ2013/000657
公开号：
WO2014/080420A2
申请日:
2013.10.29
申请国别(地区):
WO
年份:
2014
代理人:
摘要：
The Vacuum Retractable Safety Syringe (VRS) 100 for singe use comprises a plunger barrel assembly 114, outermost barrel 102 and a needle carrier assembly 104 holding a detachable needle 140 along with needle cover 142. The plunger barrel assembly comprises an inner and an outer plunger barrels. The outer plunger barrel 112 is provided with two diametrically opposite longitudinal slots 172 & 173 holding conical notches 145 &146 of finger locks 143 & 144, provided at the distal end of the inner plunger barrel. The inner plunger barrel housing inside the outer plunger barrel is also provided with a second piston seal 150 at proximal end. The outer plunger barrel 112 opening at proximal end is provided with a first piston seal 170 at the outer surface. The plunger plug 110 provided with a centrally positioned furrowed knob 154 at proximal surface is fixedly mounted at the proximal end of the outer plunger barrel. The finger lock 166 is provided at the distal end of outer plunger barrel to prevent the removal of plunger assembly from the outermost barrel. The outer most barrel comprises a uniformly elongated hollow cylindrical tubular body, provided with a conical jacket 126 opening at the proximal end, a finger rest 128 and two sets of uniform, inner circumferential C-grooves 120 and 122 at distal end. A conical needle carrier assembly 104 comprising a hollow conical needle carrier 139, holding a detachable straight hollow hypodermic needle, is fixedly mounted in the conical jacket of the outermost barrel with the help of an elastic O- ring 136. The needle carrier is provided with a cavity 130 with locking means 132 to capture the knob 154 provided in the plunger plug 1 10, which opens in a detachable straight hollow hypodermic needle 140 at proximal end. While working with the syringe, the plunger assembly 114 is pulled in backward direction until the notches 145 & 146 get engage therein the conical groove 122 to fix the inner plunger barrel. Further push of the plunge
