Yo-yo construction kit

Abstract

A yo-yo kit comprises precise metal fitting parts which provide the accuracy and ease of assembly. Metal sleeves are pressed into each yo-yo half. The sleeves provide a mounting point for turning the yo-yo halves and also carry compressive forces of the axle. During assembly, the sleeves are affixed to each body half by an adhesive such as an epoxy glue. Inner and outer hubs located at the ends of the sleeve of each body are rigidly press-fitted into each sleeve. The outer hubs include blind threaded apertures which receive the threaded ends of the axle to secure the parts in a rigidly assembly. The inner hubs are likewise press-fitted into the other ends of the sleeves and act both as radial spacers between the axle and the sleeve and also capture a centrally mounted ball bearing between opposing flanges on their respective inner facing surfaces. The inner hubs also include friction grooves to increase friction between the spinning yo-yo and the string which operates the yo-yo.

Dependencies are inferred from the claim text.