Syringe assembly

Details Syringe assembly Syringe assembly

1981-09-30

1983-09-20

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

A61M 500

Patent

active

044053177

ABSTRACT:
In a syringe assembly comprising an outer barrel for a powder medicament, an inner barrel telescopically mounted in the outer barrel for diluent, seal means isolating the powder and diluent compartments comprising a plug member made of a resilient material sealingly engaging in the discharge opening of the inner barrel, plunger means mounted on the discharge end of the inner barrel including a hollow plug chamber closed at one end remote from the discharge end of the inner barrel by a wall having a plurality of discharge openings therein, said plug adapted upon pressure buildup in the inner barrel to be displaced axially outwardly into said plug chamber to permit flow of diluent from the inner barrel to the powder compartment.

REFERENCES:
patent: 3477432 (1969-11-01), Shaw
patent: 3557787 (1971-01-01), Cohen
patent: 3685514 (1972-08-01), Cheney
patent: 3718139 (1973-02-01), Hanford
patent: 4331146 (1982-05-01), Brignola

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