(under subclass 640) Gearing comprising structure and details of rotary bodies, per se, constituting gearing elements.
SEE OR SEARCH CLASS
428, Stock Material or Miscellaneous Articles,
550, for composite stock material containing metal particles which has porous component, subclass 579 for a metallic intermediate article in the form of a disk.
474, Endless Belt Power Transmission Systems or Components, particularly
152+, for a positive drive pulley; and subclasses 166+ for a friction drive pulley.
