Amusement devices: toys – Rotating or having visible rotating portion – Having attached cord for imparting rotation
Patent
1989-01-27
1990-01-23
Yu, Mickey
Amusement devices: toys
Rotating or having visible rotating portion
Having attached cord for imparting rotation
A63H 130
Patent
active
048955477
ABSTRACT:
A high performance yo-yo displays extended spinning time and is easy to use even by a beginner. The yo-yo includes two yo-yo halves connected by the axle. A spool formed from low friction polymeric material is mounted for free rotation on the axle and the yo-yo string is attached to the spool. When the yo-yo spins, the axle rotates freely within the spool. The axial play of the spool on the axle and the space between the yo-yo halves adjacent the spool are subject to certain critical values which provide the yo-yo with its desirable operating characteristics.
REFERENCES:
patent: 3175326 (1965-03-01), Isaacson
patent: 3256635 (1966-06-01), Radovan
patent: 4207701 (1980-06-01), Kuhn
patent: 4332102 (1982-06-01), Caffrey
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