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Combined syringe and needle shield and method of manufacture

  • US 5,053,018 A
  • Filed: 06/28/1988
  • Issued: 10/01/1991
  • Est. Priority Date: 06/28/1988
  • Status: Expired due to Term
First Claim
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1. In combination,(a) a syringe comprising a barrel having distal and proximal ends, a plunger slidable within the barrel, and a needle attached to the distal end of the barrel,(b) a collar having distal and proximal ends at the distal end of said barrel and including a plurality of locking slots on its outer surface, each of said locking slots being formed by a pair of opposing walls on the distal portion of said collar and a protrusion at the back of the locking slot extending along the proximal portion of said collar, at least one of said pair of opposing walls including a ramp shaped wall surface thereon,(c) an elongated needle shield movable over said barrel and collar between a retracted position in which the needle is exposed and an extended position in which said shield covers said needle, said shield including a plurality of elongated keys on its interior surface, each of said keys having distal and proximal ends and being adapted to slide in a keyway displaced circumferentially from said locking slots and wherein at least one of said keys on said shield is rotatable over said wall surface into at least one of said locking slots when said shield is in its extended position, and(d) retaining means on said collar and shield for retaining said shield in its retracted position.

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