Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1988-12-29
1990-04-10
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604218, 604228, A61M 500
Patent
active
049156926
ABSTRACT:
A non-reusable syringe is disclosed having a syringe barrel and a plunger assembly reciprocable in the barrel. The plunger assembly comprises a plunger rod and a piston member, arranged so as to allow limited relative movement with respect to each other. The plunger rod has a resilient blocking member capable of becoming engaged with recesses in the inside wall of the syringe barrel. A safety member is removably arranged between the barrel and the plunger assembly to prevent blocking of the plunger rod before use of the syringe and define a precise dose of the liquid to be injected.
The present syringe offers practically absolute guarantee against re-use and allows better and quicker clearance of the air before the injection.
REFERENCES:
patent: 4391272 (1983-07-01), Staempfli
patent: 4781684 (1988-11-01), Trenner
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