Patent ID: 7829022

Claim:
A centrifuge tube assembly, comprising: a centrifuge and a centrifuge tube, said centrifuge tube comprising: an elongated vial having an open upper end and a closed lower end; a lid mounted on said open upper end of said vial; said lid having a central opening formed therein; said vial having a centrally disposed hollow bottom tube, having upper and lower ends, extending upwardly from the lower end thereof; said hollow bottom tube having a single lower port and a single upper port formed therein which are radially offset with respect to one another; an inner tube, having upper and lower ends; said inner tube positioned within said vial so as to rotatably extend through said central opening in said lid; said lower end of said inner tube being rotatably received by said bottom tube; said inner tube having a single lower port and a single upper port formed therein; said single lower port of said inner tube being spaced directly below said single upper port; said inner tube being selectively rotatable between first and second positions with respect to said bottom tube; said lower port of said inner tube registering with said lower port of said bottom tube when said inner tube is in its said first position; said upper ports of said bottom tube and said inner tube not being in register when said inner tube is in its said first position; said upper port of said inner tube being in register with said upper port of said bottom tube when said inner tube is in its said second position; said lower port of said inner tube not being in register with said lower port of said bottom tube when said inner tube is in its said second position.