Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1999-02-17
1999-11-16
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604110, A61M 500
Patent
active
059848987
ABSTRACT:
A combination syringe and needle are disclosed wherein the needle assembly is mounted to a retractable element which retracts into the body of the syringe plunger. The needle assembly is mounted to the needle retractor which is spring biased to retract the needle. The retraction is actuated by releasing the forward end of the retractors from engagement with a collet positioned within the forward end of the syringe outer barrel. The collet is configured so as to clamp the forward end of the retractor and only releases the forward end when the collet is pushed forward, expanded, and disengages the forward end of the needle retractor. The pressure required to fully expand the collet causes the cap located on the forward end of the hollow plunger to collapse after being penetrated by puncture tabs formed on the collet base. The hollow plunger serves as a receptive container for the needle and hub forced into the syringe by spring biased upon release of the holder by the collet as it expands.
REFERENCES:
patent: 4838863 (1989-06-01), Allard et al.
patent: 4838869 (1989-06-01), Allard et al.
patent: 5201710 (1993-04-01), Caselli
patent: 5407436 (1995-04-01), Toft et al.
Retrax Safety Systems Inc.
Yasko John D.
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