Patent ID: 9333299
Filing Date: 2016-05-10
CPC Classification: A61M

Claim Text:
1. A two-chamber type combined container-syringe, comprising: an outer tube formed in a tubular shape having a uniform inner diameter about an axis thereof in an axial direction and provided with a bypass groove concaved from an inner circumferential surface in a portion in the axial direction; a front assembly installed at a distal end of the outer tube; a finger grip installed at a rear end of the outer tube; a front stopper fitted into a distal end side of the bypass groove in the outer tube; a middle stopper fitted into a rear end side of the bypass groove in the outer tube and configured to seal a preparation with the front stopper; an end stopper fitted into the rear end side of the middle stopper in the outer tube and configured to seal a solution with the middle stopper; and a plunger rod inserted through the finger grip to be connected to the end stopper from the rear end side, wherein the inner diameter of the outer tube is a value that falls between the range of 6.0 to 10.0 mm, the plurality of bypass grooves are formed in a circumferential direction of the axis at intervals, a cross-sectional area of the bypass groove perpendicular to the axis is a value that falls between the range of 0.13% to 0.24% of an inner circumferential cross-sectional area of the outer tube perpendicular to the axis, and a depth of the bypass groove concaved from the inner circumferential surface is a value that falls between the range of 2.7% to 3.8% of the inner diameter of the outer tube.