Two compartment mixing syringe seal

Details Two compartment mixing syringe seal Two compartment mixing syringe seal

1982-09-27

1984-08-07

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604236, A61M 500

Patent

active

044641745

ABSTRACT:
In a seal for two compartment mixing syringe having an outer barrel with an inner barrel partially disposed therein, and a seal on the dispensing end of the inner barrel, and a plunger disposed in the inner barrel, the improvement is wherein the seal is a combination of an aperture in the dispensing end of the inner barrel and a plug disposed in the aperture. The plug has a cylindrical portion of resilient and compressible material adapted to be compressibly disposed in the aperture but displaceable from the aperture by fluid pressure exerted by movement of the plunger in the inner barrel. A reduced diameter portion of the plug provides a fluid pathway between the inner barrel and the outer barrel when the cylindrical portion is displaced from the aperture by such fluid pressure. An increased diameter portion prevents the plug from passing through the aperture and into the outer barrel.

REFERENCES:
patent: 2869544 (1959-01-01), Ratcliff et al.
patent: 2893390 (1959-07-01), Lockhart
patent: 3076456 (1963-02-01), Hunt, Sr.
patent: 3659749 (1972-05-01), Schwartz
patent: 4233975 (1980-11-01), Yerman

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