Patent ID: 9580832
Date: 2017-02-28
CPC Classifications: C30B,Y10T

Claim:
1. A pulling head for use in a crystal growth furnace apparatus, wherein the pulling head includes a support base, comprising: a servomotor attached to the support base; a rotatable housing attached to the servomotor, wherein the housing includes at least one housing magnet; a scale attached to the support base; a shaft attached to a scale; a connection device having at least one connection magnet wherein the at least one housing magnet and the at least one connection magnet repel each other to form a magnetic repulsion force about a first axis; and a rotation coupling attached between the shaft and the connection device wherein the scale weighs the shaft, rotation coupling and the connection device and wherein the servomotor rotates the housing and rotation of the housing is transmitted by the magnetic repulsion force to the connection device to rotate the connection device about the first axis.