Multiple-dose syringe
First Claim
1. A multiple-dose syringe, comprising:
- a barrel having a closed end and an open end, the closed end having an injection port adapted to receive a needle;
a plunger slidably disposed through the open end of the barrel; and
a container connected to an end of the plunger to move with the plunger, the container having a deformable shell with an opening at a forward end thereof and having a predetermined quantity of fluid sealed therein by a closure member disposed over the opening, wherein the container is slidably disposed in the barrel and includes a seal proximal to the forward end to form a first cavity in the barrel with a volume that is adjustable by moving the container in the barrel with the plunger so that fluid can be selectively drawn into and expelled from the first cavity, and where, upon expelling at least a substantial portion of the fluid from the first cavity, the shell is configured to be collapsed by further pressure applied by the plunger to expel the predetermined quantity of fluid contained therein.
2 Assignments
0 Petitions
Accused Products
Abstract
A multiple-dose syringe including a barrel with a closed end and an open end, the closed end having an injection port adapted to receive a needle. A plunger is slidably disposed through the open end of the barrel. A container is connected to an end of the plunger to move with the plunger. The container has a deformable shell with an opening at a forward end thereof and a predetermined quantity of fluid sealed therein by a closure member disposed over the opening. The container is slidably disposed in the barrel and includes a seal proximal to the forward end to form a first cavity in the barrel with a volume that is adjustable by moving the container in the barrel with the plunger so that fluid can be selectively drawn into and expelled from the first cavity. After at least a substantial portion of the fluid is expelled from the first cavity, the shell is configured to be collapsed by further pressure applied by the plunger to expel the predetermined quantity of fluid contained therein.
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Citations
13 Claims
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1. A multiple-dose syringe, comprising:
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a barrel having a closed end and an open end, the closed end having an injection port adapted to receive a needle;
a plunger slidably disposed through the open end of the barrel; and
a container connected to an end of the plunger to move with the plunger, the container having a deformable shell with an opening at a forward end thereof and having a predetermined quantity of fluid sealed therein by a closure member disposed over the opening, wherein the container is slidably disposed in the barrel and includes a seal proximal to the forward end to form a first cavity in the barrel with a volume that is adjustable by moving the container in the barrel with the plunger so that fluid can be selectively drawn into and expelled from the first cavity, and where, upon expelling at least a substantial portion of the fluid from the first cavity, the shell is configured to be collapsed by further pressure applied by the plunger to expel the predetermined quantity of fluid contained therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A multiple-dose syringe, comprising:
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a barrel having first and second cavities and an injection port;
a plunger slidably disposed in the barrel; and
a pressure-rupturable fluid-tight member separating the first and second cavities, where the member is configured to rupture when a user presses down on the plunger with a predetermined force, wherein the pressure-rupturable fluid-tight member is attached to a container disposed in the second cavity, the container having a deformable shell that is configured to be collapsed by pressure applied by the plunger.
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13. A multiple-dose syringe, comprising:
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a barrel having first and second cavities and an injection port;
a plunger slidably disposed in the barrel; and
a pressure-rupturable fluid-tight member separating the first and second cavities, where the member is configured to rupture when a user presses down on the plunger with a predetermined force, wherein the pressure-rupturable fluid-tight member is attached to a container disposed in the second cavity, the container having a deformable pleated shell that is configured to be collapsed by pressure applied by the plunger.
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Specification