Medical syringe

Details Medical syringe Medical syringe

1986-02-26

1987-03-17

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604194, A61M 500

Patent

active

046504680

ABSTRACT:
A single use disposable medical syringe is constructed and operated in a manner which prevents transmission of infection by the syringe after its use for inoculation. The syringe is marketed in a sterile package ready for use. The syringe needle is then covered by a shield. The syringe plunger assembly is then releasably locked to the barrel of the syringe. Following opening of the sterile package and removal of the needle shield, the plunger assembly is operated to fill the syringe barrel with medication and to inject the patient. Following injection, a piston head housing is unlocked from the syringe barrel and the plunger assembly is retracted toward the rear of the barrel and becomes automatically locked in this position with the piston head housing. The needle is disposed within the barrel rearwardly of a safety shield on the forward end of the barrel containing a safety membrane.

REFERENCES:
patent: 2888923 (1959-06-01), Reis
patent: 3584626 (1971-06-01), Johansson
patent: 4562844 (1986-01-01), Carpenter et al.
patent: 4573976 (1986-03-01), Sampson et al.

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