Patent ID: 7819792

Claim:
An automatic balance adjusting centrifuge that includes a rotor with a plurality of rotating arms which are disposed to have the same radial length from a rotational shaft for centrifuging and with equal angles around the rotational shaft, and which support buckets containing samples, comprising: a motor installed in each rotating arm; a balance weight having a female screw formed through the center thereof horizontally; a motor rotational shaft having a male screw formed on an outer circumferential surface to engage with the female screw of the balance weight, wherein the motor is directly connected to one end of the shaft such that the shaft faces a radial direction of the rotating arm and the balance weight is movable along the shaft; a guiding means to guide a straight-line motion of the balance weight; a reference position sensing means to sense a reference position of the balance weight; a current position sensing means to sense the current position of the balance weight; and a controlling means to calculate the distance between the reference position sensed by the reference position sensing means and the current position sensed by the current position sensing means, and to control the motor to transfer the balance weight by a set length along the motor rotational shaft.