Adjustable performance yo-yo

Details Adjustable performance yo-yo Adjustable performance yo-yo

1991-12-13

1993-10-19

Hafer, Robert A.

Amusement devices: toys

Rotating or having visible rotating portion

Having attached cord for imparting rotation

A63H 130

Patent

active

052540278

ABSTRACT:
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 nylon woven cord uniquely attached to a yoke on a small diameter threaded axle. Two rotating inertial disks have extended smooth surfaces refered to as lapper disks located near the center of rotation making skimming contact with the cord. The cord 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 cord. 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 up the cord. A hitch is used to form a running noose on the hand end of the cord. Variations of the invention using a twisted looped string are also disclosed.

REFERENCES:
patent: 2891351 (1959-06-01), Madaras et al.
patent: 3805443 (1974-04-01), Duncan, Jr.
patent: 4207701 (1980-06-01), Kuhn
patent: 4895547 (1990-01-01), Amaral
patent: 5017172 (1991-05-01), Siefert
patent: 5100361 (1992-03-01), Kuhn et al.

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