Patent ID: 8343426

Claim:
A separable test tube for use in a centrifugal separator, comprising: a first tube including a first coupling portion with a first thread formed an inner circumferential surface thereof and a second coupling portion which protrudes and extends from the first coupling portion and which has a second thread and a first groove formed along an outer circumferential surface thereof, and inside which an adjustment portion is fixed; a second tube including a first body part having a first space portion formed therein and a first packing fastener formed at one side thereof, and a third coupling portion which protrudes and extends to the other side of the first body part, and which has a third thread and a second groove which engage in the first thread along an outer circumferential surface thereof, and which has an adjustment groove opened and closed as the adjustment portion is inserted therein, wherein the adjustment portion has a cylindrical or a triangular flask shape and has an outer circumferential surface fixed by a plurality of fixing wings to form a path in an inner circumferential surface of the second coupling portion, and the adjustment groove has a fallopian tube shape having a slope inside thereof; a third tube including a second body part having a second space portion formed therein and a second packing fastener formed at one side thereof, and a fourth coupling portion which extends at the other side of the second body part and has a fourth thread which engages in the second thread formed on an inner circumferential surface thereof; a first watertight member coupled to the first groove; a second watertight member coupled to the second groove; a first packing coupled to the first packing fastener; and a second packing coupled to the second packing fastener.