Patent ID: 7967026

Claim:
A coupling/decoupling assembly of a pipe, comprising: a first pipe with a first flow channel; a second pipe being capable of being coupled/decoupled with the first pipe, and with a second flow channel which is connected to the first flow channel so that a fluid flows therethrough; a first valve unit being joined with the first pipe to selectively open/close the first channel; and a second valve unit being joined with the second pipe to selectively open/close the second channel, wherein each of the first and second valve units respectively opens each of the first and second flow channels when the first and second pipes are coupled with each other, and each of the first and second valve units respectively closes the first and second flow channels when the first and second pipes are decoupled from each other; and wherein the first valve unit comprises a first valve being a part of a spherical body whose outer surface is being configured in a first radius of a curvature, a first driving axis being joined with the first valve to rotate toward a center of the spherical body, and wherein the second valve unit comprises a second valve being a part of a spherical body, and having a second radius of a curvature, the second radius of the curvature being greater than the first radius of the curvature; and a second driving axis being joined with the second valve to rotate based on the center of the spherical body with the second radius of the curvature.