Patent ID: 8469871

Claim:
A centrifuge for the separation of constituents of a biologic liquid mixture, said centrifuge comprising a motor and a rotatable separation chamber, said chamber comprising a tapered tubular member having a central longitudinal axis, a first port, a second port, at least one angularly extending channel and a separation surface, said separation surface being located within the interior of said chamber and extending generally perpendicular to said central longitudinal axis, said at least one angularly extending channel having an inlet and an outlet, said inlet of said at least one angularly extending channel being in fluid communication with the interior of said chamber and located immediately adjacent said separation surface, said outlet of said at least one angularly extending channel being in fluid communication with said first port, said chamber being arranged to be rotated about said central longitudinal axis by said motor, whereupon said biologic liquid mixture in said chamber separates into concentric stratified constituent layers by the centrifugal field produced by the rotation of said chamber, the concentric stratified constituent layers comprising a first constituent layer, a second constituent layer, and a third constituent layer, said first port being in fluid communication with said at least one angularly extending channel and selectively openable to enable a portion of said first constituent layer to be discharged from said chamber through said at least one angularly extending channel and said first port, said at least one angularly extending channel being arranged so that the velocity of said first constituent layer entering said inlet is lower than the velocity of said first constituent layer exiting said at least one angularly extending channel to enter said first port, said second port being selectively openable to enable a portion of said second constituent layer to be discharged from said chamber through said second port.