Safety hypodermic syringe with retractable needle

Details Safety hypodermic syringe with retractable needle Safety hypodermic syringe with retractable needle

1992-05-18

1993-01-19

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

051803704

ABSTRACT:
A syringe for giving medical injections which has an internal mechanism for retracting the needle into the syringe after the injection has been given and locking the needle and plunger inside the barrel of the syringe to reduce the risk of accidental needle pricks. In one embodiment the needle is manually retracted by pulling back on the plunger and in the other embodiment the needle is propelled by a compressed spring into a hollow chamber within the plunger.

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patent: 5064419 (1991-11-01), Gaarde

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