Auto-disable device for syringes
AssigneeAbu Dhabi National Industrial Projects Co.
InventorsAmer F. A. Kakish, Osama Y. T. Al Omari
Life of this patent
Estimating the term…
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.
Claims7
An auto-disable device for connection externally to a sterile single use hypodermic syringe to prevent refilling of the syringe after use, the device comprising:
- (a) a barrel adapter configured to attach to an outlet of a barrel of the syringe, said attachment being external to the barrel and such that an inlet of the barrel adapter is in fluid communication with the outlet of the barrel;
- (b) a needle hub affixed to the barrel adapter and having a hypodermic needle affixed 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 the inlet of the barrel adapter to the needle, the cavity having a section thereof that is within the needle hub and outside the barrel adapter, the barrel adapter having a cylindrical ring-retaining portion at an end thereof that engages the needle hub;
- (d) an elastically-deformable sealing ring in the cavity, the sealing ring having an annular base portion and an inwardly-extending sealing portion having an opening therein, the annular base portion being fitted into the ring-retaining portion of the barrel adapter, the needle hub abutting against the ring-retaining portion of the barrel adapter and against the sealing ring;
- (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 sealing portion of the ring facing the inlet of the barrel adapter to a second position in which the head of the sealing member is on a side of the sealing portion of the ring facing the needle and within the section of the cavity that is within the needle hub;
- and
- (f) the sealing portion of 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 barrel adapter.
Dependencies are inferred from the claim text.