Syringe hypodermic needle

Details Syringe hypodermic needle Syringe hypodermic needle

1988-02-29

1989-06-20

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604218, 604210, A61M 500

Patent

active

048406163

ABSTRACT:
A single use disposable medical syringe with the plunger shaft having first and second splines. The first splint co-acts with a first pawl to allow withdrawal only of the plunger. The plunger is then rotated to another position, wherein the second spline co-acts with a second pawl to permit insertion only of the plunger. The plunger may not then be withdrawn for re-use.

REFERENCES:
patent: 2869541 (1959-01-01), Helmer et al.
patent: 2875761 (1959-03-01), Helmer et al.
patent: 4643199 (1987-02-01), Jennings, Jr. et al.
patent: 4650468 (1987-03-01), Jennings, Jr.
patent: 4654035 (1987-03-01), Ando

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