Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1986-07-21
1988-01-19
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604206, 604240, 604263, A61M 532
Patent
active
047202858
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an injection syringe.
In the case of disposable injection syringes, it is known to provide withdrawable caps for protection of the syringe needle, during transport and to reduce the risk of an injury. As a rule, the injection syringe is assembled with a syringe needle of this kind only just before utilisation.
In the case of packaging comestible and luxury food products, and pharmaceuticals which are to be administered, it is known to provide a security closure which makes it possible to discover whether a package has been broached or opened, or not. In the case of injection needles, it is known furthermore to store these in a plastics material container, for example a plastics material bag, packed in sterile manner under welded seal.
The invention has as its object an injection syringe comprising an already attached needle which is packaged in sterile manner from the time of filling and until its utilisation, without any complementary protective measures. Furthermore, the injection syringe should be openable only in a manner which subsequently clearly discloses the fact that the syringe had already been opened.
The object of the invention is accomplished with an injection syringe comprising a syringe body adapted to receive an injection fluid and a frusto-conically tapered attachment member integral with the syringe body, the syringe body and the attachment member defining an annular groove therebetween, and the attachment member defining an outlet opening for the injection fluid in communication with the syringe body. A membrane closes the outlet opening. A syringe needle is arranged coaxially with the outlet opening and a tubular needle element is arranged coaxially with the outlet opening and in communication with the syringe needle, the tubular needle element having an end facing the membrane and the membrane being interposed between the tubular needle element end and the outlet opening. The injection syringe further comprises a two-part protective cap for the syringe needle, one part of the cap constituting a securing device for the cap and including inwardly projecting claw means resiliently engaging the annular groove, a second part of the cap constituting a needle protection cap, and a weakened score line frangibly connects the parts of the protective cap. A two-part device for breaking the membrane whereby the outlet opening communicates with the tubular needle element extends in the interior of the protective cap from the attachment member past the score line to the needle protection cap and essentially consists of a needle carrier part joined to the protective cap and defining an axial bore having an open end facing the membrane, a support member part joined to the tubular needle element, the support member holding the syringe needle and the support member with the tubular needle element being displaceably guided in the needle carrier part relative to the membrane in a direction of the longitudinal extension of the syringe needle for piercing the membrane, and the tubular needle element being sealingly and slidably guided in the needle carrier.
In such an injection syringe, the needle protection cap itself may be utilised for a security seal or closure. Other advantages of the structure according to the invention emerge from the fact that the needle protection cap may assure the force-locked connection of the needle with the attachment member of the phial, simultaneously with its base element, a sterile seal being secured in this area at the same time. If, for example, the needle protection cap is joined to the needle carrier by welding or bonding, it is possible to secure a simple snap-on joint, in which the needle carrier is sealingly kept in contact with the attachment member, the sterility is maintained by means of the sealing surfaces and a contamination is prevented. This snap-on joint is not releasable without a tool, and since it is possible to select conventional materials as the material of the protective cap, for example plastics materials, the application of
REFERENCES:
patent: 2828742 (1958-04-01), Ashkenaz
patent: 3073307 (1963-01-01), Stevens
patent: 3989044 (1976-11-01), Meierhoefer
patent: 4249530 (1981-02-01), Millet
patent: 4281653 (1981-08-01), Barta et al.
patent: 4334536 (1982-06-01), Pfleger
Kelman Kurt
Yasko John D.
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