Patent ID: 6866622

Claim:
A rotor for a centrifugal separator comprising: a rotor body having a cylindrical outer wall extending upward from a bottom portion and a boss portion provided at a center of said bottom portion, said outer wall being located radially outward with respect to said boss portion serving as a rotational center of said rotor body; a plurality of buckets swingably supported in said rotor body, each bucket holding a boxlike sample container; and a supporting means for supporting a hinge shaft serving as a swing center of said bucket, wherein each of said buckets has a bottom surface brought into contact with an inside surface of said outer wall due to a centrifugal force when said rotor rotates, so that said buckets and said rotor body integrally rotate during centrifugal operation, and said hinge shaft is offset from a line extending from a centroid of said bucket perpendicularly to said bottom surface of said bucket, and is located at a position higher than said sample container and said bucket inclines obliquely with respect to the bottom portion of said rotor body in a condition that said rotor body is stopped.