Device for winding and storing a used needle of an injector

Details Device for winding and storing a used needle of an injector Device for winding and storing a used needle of an injector

1998-07-31

2001-02-06

Stright, Jr., Ronald K. (Department: 3762)

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

C604S192000, C128S919000

Reexamination Certificate

active

06183439

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an injector for medical use having a needle fixed to its syringe, particularly to a safety injector which permits the used needle to be handled with safety.
2. Description of Related Art
One example of such safety injector is disclosed in Japanese Patent 1-136665(A). This prior art injector includes adisposable container for containing the needle after used and removed from the syringe.
More specifically the used needle can be removed from the syringe by using the cover plate of the disposable container, not directly using one's fingers. For this purpose the cover plate is designed to have a slot made therein, comprising a wide section for receiving the flanged end of the needle and a narrow section for catching the flanged end of the needle. The whole length of used needle is inserted from the wide section of the slot in the disposable container, and the syringe is moved toward the narrow section of the slot so that the flange of the needle may be put in contact with the rear side of the cover plate across the narrow section of the slot. Then, the syringe is pulled up to leave the used needle in the disposable container.
Inconveniently injectors must be carried always along with associated disposable containers, and such disposable containers must be put aside when using the injectors. More disadvantageously after using the injector a doctor or nurse inserts the used needle into the slot of the disposable container. On this occasion there is a danger of injuring his or her hand or finger with the contaminated needle. If the syringe-and-needle is not moved so far as to put the needle completely in the narrow section of the slot of the cover plate, it may happen that the contaminated needle is not removed from the syringe when the syringe is pulled up from the disposable container, and then the contaminated needle is likely to injure one's hand or finger as a result of counter action to the pulling-up of the syringe.
There has been, therefore, an increasing demand for reducing such inconvenience and danger in handling injectors.
SUMMARY OF THE INVENTION
To meet such demand a safety injector having a needle-and-hub body attached thereto is improved according to the present invention in that it has needle winding-and-storing means equipped therewith, said needle winding-and-storing means comprising a cylindrical container and a needle winding axle rotatably fixed therein.
The cylindrical container has a small through hole made therein for the needle of the needle-and-hub body to pass therethrough; and the needle winding axle has the hub of the needle-and-hub body fixed thereto, permitting the cylindrical container to rotate about the needle winding axle. The cylindrical container is adapted to turn about the needle winding axle, which stands aside from the hub of the needle-and-hub body, thereby permitting the needle winding axle to pull in and wind the needle of the needle-and-hub body therearound. The injector may further comprise detent means for preventing the cylindrical container from rotating in the opposite or unwinding direction. It may further comprise rattle-proof means provided between the needle winding axle and the cylindrical container, thereby preventing the rattling or inadvertent rotation of the cylindrical container before the needle-winding operation starts.
The injector may further comprise a thumb catch integrally connected to the hub of the needle-and-hub body or the needle winding axle for assisting the needle-winding operation. The needle of the needle-and-hub body may be a thin needle, soft needle or resin needle of all or partial resin, thereby facilitating the winding of the needle of the needle-and-hub body.
The safety injector permits the pulling-in and coiling of the needle immediately after being used until the needle end disappears from the disposable container, thereby assuring that nobody may be injured by the contaminated needle. The injector whose disposable container contains a contaminated needle can be disposed of.
The disposable container is fixed to the syringe of the injector, thereby eliminating any inconvenience which otherwise, would be caused by carrying a separate disposable container along with an injector. Thanks to means for preventing rotation of the disposable container in the unwinding direction and rattle-proof means the injector can be handled with safety.
Other objects and advantages of the present invention will be understood from the following description of some safety injectors according to preferred embodiments of the present invention, which are shown in accompanying drawings.


REFERENCES:
patent: 4266544 (1981-05-01), Wardlaw
patent: 4634428 (1987-01-01), Cuu
patent: 5019048 (1991-05-01), Margolin
patent: 5084019 (1992-01-01), Gartz
patent: 5084020 (1992-01-01), Gartz
patent: 5476106 (1995-12-01), Gartz
patent: 1-136665 (1989-05-01), None

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