US 6,585,691 B1 · Tamper evident end cap assembly for a loaded syringe and process

Abstract

An improved tamper evident end cap assembly for a drug loaded syringe which assembly includes a syringe cap to close the discharge port in the nozzle of the syringe and an indicator ring about the nozzle connected by chads or tabs to a tubular shield which chads or tabs are adapted to break freeing the ring from the shield to loosely wobble on the nozzle indicating tampering if an axial force of separation is applied to the syringe cap to remove it from the syringe and a one way drive mechanism engaging both the shield and syringe cap so the shield may be rotated to advance the assembly onto a syringe nozzle but which is not responsive to counter rotation to withdraw the syringe cap to open the discharge port and gain access to the drug.

Claims16

Dependent claims

A tamper evident end cap assembly for a syringe having a nozzle with a discharge port, said assembly comprising:

a) an end cap member including at least one open end dimensioned to receive the nozzle therethrough,
b) an indicator ring disposed within said end cap member and a connecting assembly releasably securing said indicator ring to said end cap member,
c) said connecting assembly structured to disconnect said indicator ring from said end cap member upon a predetermined force being applied to said end cap member,
d) a syringe cap movably disposed within said end cap member and axially positionable into a fluid restricting position relative to the discharge port, and
e) a drive assembly partially mounted on said end cap member and structured to rotate said syringe cap in only a single direction for disposition of said syringe cap in said fluid restricting position.

2 more elements

Dependencies are inferred from the claim text.

Tamper evident end cap assembly for a loaded syringe and process

Life of this patent

Tamper evident end cap assembly for a loaded syringe and process

Life of this patent

Abstract

Claims16