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US 5,665,068 AGranted
Dual chamber prefillable syringe
AssigneeArte Corporation
InventorNoriyuki Takamura
Life of this patent
Estimating the term…
Abstract
A syringe outer cylinder is split into a front chamber outer cylinder and a rear chamber outer cylinder. Powdered medicine is sealed in a sterilized state in the front chamber outer cylinder. Liquid medicine is sealed in a sterilized state in the rear chamber outer cylinder. Thereafter, the front chamber outer cylinder is coupled to the rear chamber outer cylinder with a coupling component, and the dual chamber prefillable syringe is assembled. Therefore, sealing of powdered medicine and liquid medicine can occur in parallel.
Claims8
A dual chamber prefillable syringe, comprising:
- a syringe outer cylinder having an inner wall and a recessed longitudinal bypass groove on the inner wall the bypass groove having a length, and the outer cylinder having an outer cylinder opening at one end thereof and an opposite cylindrical end having a liquid-tight seal;
- a sealing plug of thickness less than the length of said bypass groove, the sealing plug providing a liquid-tight seal between the outer cylinder and the sealing plug at a position between the outer cylinder opening and said bypass groove to form a first inner chamber between the outer cylinder end and said sealing plug;
- and
- a plunger disposed at a position between said outer cylinder opening and said sealing plug, the plunger forming a liquid-tight seal between the outer cylinder and the plunger and forming a second inner chamber between said plunger and said sealing plug;
- wherein:
- said syringe outer cylinder is split, in a direction perpendicular to a longitudinal direction of the outer cylinder and at a position between said outer cylinder opening and said bypass groove, dividing the outer cylinder into a front chamber outer cylinder and a rear chamber outer cylinder;
- said front chamber outer cylinder includes said bypass groove, said cylindrical end, an inner, longitudinally extending wall, and a first split opening;
- said rear chamber outer cylinder includes said outer cylinder opening, an inner, longitudinally extending wall, and a second split opening;
- an inner peripheral edge of said first split opening of said front chamber outer cylinder is opposed over its entire periphery to an inner peripheral edge of said second split opening of said rear chamber outer cylinder, so that said front chamber outer cylinder and said rear chamber outer cylinder are disposed in series;
- said front chamber outer cylinder and said rear chamber outer cylinder are held in a liquid-tight manner by a coupling component;
- said bypass groove of said front chamber outer cylinder is spaced from said first split opening of said front chamber outer cylinder;
- and
- said sealing plug simultaneously contacts an entire periphery of both 1) said inner, longitudinally extending wall of said rear chamber outer cylinder and 2) said inner, longitudinally extending wall of said front chamber outer cylinder.
10 more elements
Dependencies are inferred from the claim text.