Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1996-02-12
1997-02-25
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604195, A61M 500
Patent
active
056055447
ABSTRACT:
A kind of safety injector comprises a drug tube assemblage, an injector needle assemblage and a soft release element. A drug tube assemblage includes an outer tube for storing medicament, a hollow push rod with hollow inner portion for accepting the injector needle, and a rubber plunger which is movable together with the hollow push rod and having a frangible sealing element. The injector needle assemblage includes a body which is connected and attached in replaceable way to the top side of the outer tube, an injector needle with its base which is caught in the body in a releasable way, and an elastic element which exerts downwards elastic force to the needle base. After accomplishing the injection, the hollow push rod is continually pushed upwards for very short distance with the soft release element moving together, and the injector needle with its base is forced to separate from the body by the release element. Furthermore, the elastic element forces the needle base and the needle which is fixed on it to remove downwards. After having destroyed the frangible sealing element of the rubber plunger, on way of its downwards displacement, the injector needle with its base drops into the inner space of the hollow push rod so that the happening of injury by the contaminated needle after injection can be avoided.
REFERENCES:
patent: 5180369 (1993-01-01), Dysarz
patent: 5180370 (1993-01-01), Gillespie
patent: 5221262 (1993-06-01), Kite
patent: 5318536 (1994-06-01), Williams
Chan Raymond Y. C.
Yasko John D.
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