Patent ID: 8590566
Filing Date: 2013-11-26
Classification: B67D,F16L,Y10T

Abstract:
1. A coupling device which is provided at the mouth of a container accommodating a flexible container containing liquid and gas and which includes a single-piece plug and a fitted member to be fitted in the single-piece plug, wherein the single-piece plug includes: a cylindrical plug cylinder; a liquid passage communicating with the liquid and through which the liquid is let in and out; a gas passage communicating with the gas and through which the gas is let in and out; and a fluid passage communicating with a space between the container and the flexible container and through which fluid is let in and out, wherein a plurality of the gas passages are provided on a circle centered on the axis of the plug cylinder in the axial direction, wherein a plurality of the fluid passages are provided on a second circle centered on the axis in the axial direction, wherein the gas and the fluid passages are provided at a predetermined angle with respect to each other, wherein each of the plurality of the fluid passages is located between two gas passages of the plurality of gas passages which are adjacent to each other, and wherein each of the plurality of the gas passages is located between two fluid passages of the plurality of fluid passages which are adjacent to each other.