초록 ▼

A syringe device for use with two components to be combined prior to discharge, comprising a syringe body without the proximal end, a syringe plunger rod threadedly engageable into a plunger and a lined seal for engagement with a needle hub. The syringe body has at the distal end a radially inwardly

A syringe device for use with two components to be combined prior to discharge, comprising a syringe body without the proximal end, a syringe plunger rod threadedly engageable into a plunger and a lined seal for engagement with a needle hub. The syringe body has at the distal end a radially inwardly directed internal sealing ring dividing the body to define a distal chamber and a proximal chamber. Also provided is an internal bypass stopper sized to fit the syringe body and engage the sealing ring to sealingly separate the distal chamber and the proximal chamber. The stopper has a plurality of projections circumferentially spaced thereon for engagement with the syringe body on at least one side of the sealing ring. The projections define by-pass channels therebetween to permit flow of liquid from the proximal chamber to the distal chamber upon movement of the stopper toward the distal end.

대표청구항 ▼

A syringe assembly comprising: an elongated hollow tubular barrel having an inner peripheral surface and a discharge opening at one end and; means defining a radially inwardly directed circumferentially extending rib in the inner peripheral surface of said barrel dividing said barrel into a first me

A syringe assembly comprising: an elongated hollow tubular barrel having an inner peripheral surface and a discharge opening at one end and; means defining a radially inwardly directed circumferentially extending rib in the inner peripheral surface of said barrel dividing said barrel into a first medicament chamber on one side of said rib and a second diluent chamber on the opposite side of said rib; a by-pass stopper engageable interiorly of said barrel having a circumferentially extending exterior sealing surface of a predetermined diameter greater than the diameter of the rib to provide a seal between said chambers when engaged therewith and means defining at least one axially extending flow path on at least one side of said sealing surface providing fluid communication between said chambers when said stopper is displaced axially relative to the rib.