Dual string yo-yo

Details Dual string yo-yo Dual string yo-yo

1994-08-22

1995-11-28

Hafer, Robert A.

Amusement devices: toys

Rotating or having visible rotating portion

Having attached cord for imparting rotation

D21 99, 446901, A63H 130

Patent

active

054702690

ABSTRACT:
A dual string yo-yo including a dual string interconnection of the yo-yo body to the fingers of an operator and a yo-yo body comprising enlarged end portion and an enlarged central portion separated by two necked portions whereupon the dual strings are separately wound. The yo-yo body may be of solid or structured composition and furthermore may include mass distributions devised to enhance the rotational inertial characteristics of the yo-yo. A pair of adjustable bandlike string attachment bands is provided to engage a pair of fingers of an operator. Irregular shapes and lighted versions are disclosed.

REFERENCES:
patent: 207527 (1878-08-01), Katz
patent: 1864318 (1932-06-01), Powell
patent: 3207508 (1965-09-01), Klemke
patent: 3228140 (1966-01-01), White
patent: 3444644 (1969-05-01), Sayegh
patent: 4273275 (1981-06-01), Vadnais
patent: 4290225 (1981-09-01), MacCarthy
patent: 4318243 (1982-03-01), MacCarthy
patent: 4437261 (1984-03-01), MacCarthy
"Experimental Fun with the yo-yo", by Al Renner, N.Y., 1979.

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