Safety syringe

Details Safety syringe Safety syringe

1999-12-30

2000-07-25

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

06093171&

ABSTRACT:
A safety syringe that is characterized by that a plunger thereof has an elastic stopper fitted around a neck portion of the plunger near a front end thereof. When the plunger is fully pushed forward in a barrel of the syringe, the stopper slightly deforms to allow the plunger to move forward a little further, so that all medical liquid in the barrel is injected into a patient's body. The safety syringe is also characterized by that an elastic catch hook is provided at the front end of the plunger and a catch rib is provided around a rear inner end of a locking tip that is fitted to a front end of the barrel for a needle to connect thereto. When the plunger is further pushed forward in the barrel, the catch hook is moved beyond the catch rib and retained in the locking tip by the catch rib. Whereby, simply pulling the plunger backward could directly pull the locking tip and a used needle backward into the barrel to avoid injuring others. And, no medical liquid or sucked blood would remain in the used needle to cause a second time contamination.

REFERENCES:
patent: 5047016 (1991-09-01), Dolgin et al.
patent: 5215533 (1993-06-01), Robb
patent: 5395346 (1995-03-01), Maggioni
patent: 5405327 (1995-04-01), Chen
patent: 5634903 (1997-06-01), Kurose et al.
patent: 5693023 (1997-12-01), Adams
patent: 5785687 (1998-07-01), Saito

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