Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1997-01-08
1999-10-26
Stright, Jr., Ronald K.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604110, 604192, 206365, A61M 500, B65D 8310
Patent
active
059719664
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a 35 U.S.C. 371 national application of PCT/DK95/00306 filed Jul. 14, 1995 and claims priority under 35 U.S.C. 119 of Danish application 0857/94 filed Jul. 19, 1994, the contents of which applications are fully incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of Invention
The invention relates to a magazine for storing and final disposal of a snap-on needle unit carrying a needle mounted in a hub comprising a sleeve with an open end for insertion of a needle receiving part of a syringe and exhibiting a cylindric outer wall.
2. Description of Related Art
A snap-on needle unit is a unit which may be mounted on a syringe by an axial movement of the syringe and the needle unit towards each other. During this movement a needle receiving part of the syringe is passed into a sleeve of a needle hub forming part of the needle unit until protrusions on the inner surface of the sleeve engage recesses in the needle receiving part.
As opposed to needle units which a screwed onto the syringe an axial pressure must be exerted on the needle unit and the syringe to provide the snap engagement between the two parts. Correspondingly a certain axial force must be used to pull the syringe and the needle unit apart again when after use the needle is removed from the syringe for final disposal.
During mounting and dismounting of the needle unit it is important that the outer pointed end of the needle is protected so that neither the user nor an assisting person scratch himself by this pointed end. Therefore the needle unit is stored in a magazine which covers the needle unit only leaving free the opening wherein the needle receiving part of the syringe shall be inserted.
SUMMARY OF THE INVENTION
It is the object of the invention to provide a magazine which may further be used for removing a used needle from the syringe and for keeping it locked in the magazine in a position so that the used needle may not be removed from the magazine after the reinsertion therein. Further it is the object of the invention to show appropriate modifications of the needle unit design which ensures a good collaboration between the needle unit and the magazine.
A magazine according to the invention is characterized in that it has a compartment having a bottom, a cylindric side wall, and an access opening, which compartment accommodates the needle unit with a gap between the outer side wall of this needle unit and the inner side wall of the compartment, and that a circle of tongue shaped flexible protrusions at one end thereof are hinged at the inner surface of the side wall of the compartment and at their other end are free, the length of the protrusions exceeding the width of the gap so that the protrusions are deflected to assume an oblique position with their free ends abutting the cylindric outer wall of the needle unit, the free ends pointing towards the access opening of the compartment when the unused needle is stored in the magazine and pointing towards the bottom of the compartment when the needle unit is reinserted in the magazine.
When the needle unit is stored in the magazine the bottom of this magazine supports the needle hub when a needle receiving end of a syringe is pressed into the needle hub to mount this hub onto the syringe. When the needle hub is snap engaged to the syringe it may easily be drawn out of the magazine with the protrusions sliding along the cylindric outer surface of the needle hub. When a used needle unit is reinserted into the magazine the flexible protrusions will have assumed a position wherein the opening defined by the free end of the protrusion has a smaller diameter than has the cylindric part of the needle hub. When the hub is inserted the protrusions will be deflected with their free ends pointing toward the bottom of the compartment until these protrusions assume an oblique position where the cylindric part of the needle unit may pass the free ends of the protrusions which may now slide over the surface of the cylindr
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Novo Nordisk A S
Stright Jr. Ronald K.
Zelson Esq. Steve T.
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