| 摘要 |
An adjustable performance yo-yo, allowing the operator to optimize the degree of frictional drag maximizing sleep time and being able to return the yo-yo to the hand at will. The invention uses a single woven polyester cord tether uniquely attached to a yoke on a small diameter threaded floating axle. The standard twisted pair strand tether is also use. Two rotating inertial disks have extended smooth surfaces referred to as lapper disks located near the center of rotation making skimming contact with the tether. The frictional drag is adjusted by rotating a threaded knob on the end of the axle which effects the proximity of the lapper disk to the tether. The two inertial disks spin independently of each other. The two body halves are made of a resilient material which cushions the hand from impact of a rapid return of the yo-yo. A hitch is used to form a running noose on the hand end of the tether. A Velcro strap is also used.
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