(under subclass 9) Devices in which the held article or socket member therefore is free to move in any direction or out of alignment with the axis of the chuck body.
SEE OR SEARCH CLASS
464, Rotary Shafts, Gudgeons, Housings, and Flexible Couplings for Rotary Shafts, appropriate subclasses for a coupling between a shaft and driven member having angularly related or misaligned axes.