Patent ID: 6517516
Filing Date: 2003-02-11
Classification: A61M

Abstract:
A method of making an operable retracting needle assembly comprising the steps of:providing an outer hub having a proximal end, a distal end and a passageway therethrough; providing an inner hub having a proximal end, a distal end and a conduit therethrough, said proximal end having an inner portion and a dissociable outer portion connected to said inner portion; providing a needle cannula having a distal end, a proximal end and a lumen therethrough; providing a coil compression spring; assembling said inner hub, said spring and said outer hub so that said spring is compressed and held between said inner hub and said outer hub by said inner hub being connected to said outer hub so that said distal end of said inner hub is accessible from said passageway at said distal end of said outer hub; positioning said proximal end of said cannula in said distal end of said conduit of said inner hub; applying adhesive in said conduit so that said adhesive contacts said conduit and said needle cannula; attaching said needle assembly to a syringe barrel having an inside surface defining a chamber, an open proximal end and an open distal end including a cylindrical collar so that said outer hub engages said collar, wherein said syringe barrel includes a plunger slidably positioned in fluid-tight engagement with said inside surface of said syringe barrel, said plunger further including a release element having a sharp distal end capable of cutting through said inner hub to separate said dissociable outer portion from said inner portion of said inner hub; and removably connecting an elongated needle shield to said outer hub so that said distal end of said needle cannula is in said needle shield.