Patent ID: 6332876
Filing Date: 2001-12-25
Classification: A61M

Abstract:
A one piece molded syringe, comprising:a hollow body at least partially filled with liquid, said hollow body having a longitudinal axis, a closed rear wall, a bellows adjoining said closed rear wall, and a forward portion adjoining said bellows opposite said rear wall and including a nozzle having an outer end;a fracturable closure seal formed integrally with said outer end of said nozzle for closing said nozzle until initial use of said syringe;an elongate pliable tether connected to said seal and said hollow body and connecting said seal to said hollow body to prevent separation of said seal from said hollow body;first fastening means provided on said hollow body and second fastening means provided on said tether and said fastening means for being engaged to fasten said tether to said hollow body upon said seal being broken away from said outer end of said nozzle, said first fastening means comprising a pair of tabs extending outwardly from said body and providing a first indentation therebetween and said second fastening means comprising a portion of said tether providing a second indentation and wherein said indentations are engageable to fasten said tether to said body;said bellows including a plurality of bellow rings each having a diameter and wherein the diameters of said bellows rings increase successively from said rear wall toward said nozzle;each bellows ring including a rearward frusto-conical wall having a thickness and disposed toward said closed rear wall and a forward frusto-conical wall having a thickness and disposed toward said nozzle and wherein the thickness of said rearward frusto-conical wall is greater than the thickness of said forward frusto-conical wall, said walls converging at an apex and said rearward frusto-conical wall at a first included angle with respect to a plane perpendicular to said axis and extending through said apex and said forward frusto-conical wall at a second included angle with respect to said plane and said first included angle being greater than said second included angle;said fracturable closure seal including a sealing member formed integrally with and extending transversely with respect to said sealing member and for having torque applied thereto to fracture and remove said sealing member from said outer end of said nozzle; andwherein said first included angle is about 45.degree. and wherein said second included angle is from about 30.degree. to about 35.degree..