Patent ID: 9731301
Date: 2017-08-15
CPC Classifications: B04B

Claim:
1. A swing rotor for a centrifuge, comprising: a plurality of holding pins disposed on a swing type rotor body; and a plurality of buckets hung on the holding pins in a swingable manner, wherein the rotor body comprises a plurality of arm parts extending outward in a radial direction from a rotation center and a plurality of branch arms diverging at a front end of each of the arm parts on an outer peripheral side to be separated by a predetermined angle, and the holding pins are fixed to the branch arms, wherein a connection part is configured to connect two of the branch arms diverging from the arm parts on the outer peripheral side, and a thickness-reduced part penetrating in a same direction as a rotation axis of the rotor body is configured in a region surrounded by the two branch arms on an inner peripheral side of the connection part, wherein a circumferential thickness of one of the branch arms connected to the connection part is smaller than a radial thickness of the connection part, and the holding pins are protrusions formed integrally with the rotor body and each comprise a cylindrical surface, and boundary portions between the branch arms and the holding pins are connected by curved surfaces including convex base parts, such that during a centrifugal separation operation the branch arms deform in a state substantially perpendicular to the holding pins, such that stress concentrations near the convex base parts of the holding pins are alleviated.