Safety needle and syringe

Details Safety needle and syringe Safety needle and syringe

1993-09-29

1994-12-06

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604198, 604263, A61M 532

Patent

active

053706285

ABSTRACT:
A disposable safety needle and syringe assembly includes a needle shield movably positioned within a syringe housing. Movement of the needle shield from the housing is effected by movement of the syringe plunger and plunger piston following completion of an injection whereby the needle shield envelopes the needle extending from the housing to prevent accidental needle sticks. The plunger piston is disengagable from the plunger at a limit of travel upon retraction of the plunger, thus maintaining the shield in a locked position enveloping the needle. The syringe and needle assembly can then be safely handled for disposal, and the possibility of inadvertent reuse of the needle is eliminated.

REFERENCES:
patent: 4737150 (1988-04-01), Baeumle et al.
patent: 4863434 (1989-09-01), Bayless
patent: 5151088 (1992-09-01), Allison et al.

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