Patent ID: 8596470

Claim:
A buoy fractionation system, comprising: a buoy member having a first surface and an opposed second surface defining a width of the buoy member at an outer perimeter of the buoy member; wherein at least the first surface extends to the outer perimeter of the buoy member and transverse to an axis extending from the second surface; wherein the first surface has a surface portion that is angled toward a sump region that is nearer the outer perimeter than a center of the buoy member; wherein the first surface is angled toward the sump region for greater than one-half of the width of the buoy member; wherein the at least a portion of the buoy member is configured to be moved to an interface of at least two fractions of a separated material and the sump region is configured to positioned within one of the two fractions; wherein an angled portion of the first surface extends through the center of the buoy member to the sump region; wherein the first surface includes a precision collection area having an angle towards the sump region that is different from the angle of the surface portion of the first surface.