Auto-disable device for syringes
AssigneeAbu Dhabi National Industrial Projects Co.
InventorsAMER F.A. KAKISH, OSAMA Y.T. AL OMARI
Life of this patent
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Abstract
An auto-disable device for use with a sterile single use hypodermic syringe has a barrel adapter configured to attach to the outlet end of the syringe barrel, external to the barrel. A needle hub holding a hypodermic needle is affixed to the barrel adapter, the barrel adapter and the needle hub forming an assembly having a cavity with a passage for the flow of liquid through the device. An elastically-deformable sealing ring and a moveable sealing member having a head and a shaft are positioned in the cavity. The sealing member is moveable within the cavity. The ring and moveable sealing member are configured to form a seal, after a single use of the syringe, against a flow of liquid into the syringe for refilling of the syringe.
Claims8
An auto-disable device for use with a sterile single use hypodermic syringe comprising:
- (a) a barrel adapter configured to attach to an outlet end of a barrel of the syringe, said attachment being external to the barrel;
- (b) a needle hub affixed to the barrel adapter and having a hypodermic needle fixed thereto;
- (c) the barrel adapter and the needle hub forming an assembly having a longitudinal axis, the assembly having a cavity with a passage for the flow of a liquid from an inlet of the assembly to the needle;
- (d) an elastically-deformable sealing ring in the cavity having an opening therein;
- (e) a sealing member in the cavity having a head and a shaft, the sealing member being moveable in the cavity in a longitudinal direction from a first position in which the head of the sealing member is on a side of the ring facing the inlet of the assembly to a second position in which the head of the sealing member is on a side of the ring facing the needle;
- and
- (f) the ring being configured to stop movement of the sealing member from the second position to the first position and to form a seal with the head, when the sealing member is in the second position, against a flow of liquid in the direction from the needle to the inlet of the assembly.
Dependencies are inferred from the claim text.