초록 ▼

A two-component syringe includes a barrel having a chamber for retaining fluid and a distal end of the barrel having a passageway therethrough communicating with the chamber. A by-pass stopper is slidably positioned in fluid-tight engagement inside the barrel. The stopper has a distal rib contacting

A two-component syringe includes a barrel having a chamber for retaining fluid and a distal end of the barrel having a passageway therethrough communicating with the chamber. A by-pass stopper is slidably positioned in fluid-tight engagement inside the barrel. The stopper has a distal rib contacting the barrel, a recess on the proximal side of the rib and a groove in the rib for allowing fluid communication between the recess and the chamber. This groove is positioned angularly with respect to the longitudinal access of the barrel so that liquid passing therethrough is directed angularly with respect to the longitudinal axis of the barrel. The barrel also includes a raised peripheral portion serving as a by-pass and defining a by-pass zone. The by-pass zone is shorter than the length of the stopper along the longitudinal axis of the barrel. The by-pass is sufficiently long and raised enough to allow liquid to flow around the stopper between the proximal end of the stopper and the recess when the proximal end of the stopper is positioned in the by-pass zone. Also included is a piston slidably positioned in fluid-tight engagement inside the barrel. This piston is adapted to engage a plunger rod to facilitate its operation.

대표청구항 ▼

A two-component mixing syringe comprising: an elongate, hollow barrel having a chamber for retaining the components; a tip extending from a distal end of said barrel having a passageway therethrough communicating with said chamber; a by-pass stopper slidably positioned in fluid-tight engagement insi

A two-component mixing syringe comprising: an elongate, hollow barrel having a chamber for retaining the components; a tip extending from a distal end of said barrel having a passageway therethrough communicating with said chamber; a by-pass stopper slidably positioned in fluid-tight engagement inside said barrel having a distal rib contacting said barrel, said stopper having a recess on the proximal side of said rib and a groove in said rib, said groove allowing fluid communication between said recess and said chamber and positioned angularly with respect to the longitudinal axis of said barrel so that fluid passing through said groove is directed angularly with respect to the longitudinal axis of said barrel; a raised peripheral portion of said barrel serving as a by-pass and defining a by-pass zone, said by-pass zone being shorter than the length of said by-pass stopper along the longitudinal axis of said barrel, said by-pass being sufficiently long and raised to allow fluid to flow around said stopper between the proximal end of said stopper and said recess when the proximal end of said stopper is positioned in said by-pass zone; and a piston slidably positioned in fluid-tight engagement inside said barrel adapted to engage a plunger rod to facilitate its operation, said piston capable of moving fluid from said chamber through said passageway upon its movement toward said distal end, said piston capable of facilitating the drawing of fluid into said chamber through said passageway upon its movement away from said distal end.