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As most tricks are performed while the yo-yo is sleeping, but not completed until the yo-yo returns to the hand of the player, the quick-adjustable sleep feature is an important aspect of the present invention. The O-rings press against the O-ring washers 18a which contact the bearing washers 18 which engage the bearing inner race Positioned between each hub on the axle are two O-rings 17, two bearing washers 18, two O-ring washers 18a, and a roller bearing Using data from Tables 1 and 2, various characteristics of an exemplary embodiment yo-yo can now be determined. Yet another embodiment of the string finger guard is shown in FIG. Structure Referring to FIG. He said siblings of his students bought their own yo-yos, and his students bought additional yo-yos in different colors.

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He hopes to use the lesson again this year. New strings are “fat,” but as the cotton wears the string thins out, and the string surface becomes smoother as it is wound and unwound from around the yo-yo 6.

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Most read stories Heavy snowfall delays search for Spokane climber Jess Roskelley and partners, but weather shows signs of improvement … Shawn Vestal: In other words, maximizing the rotational inertia noopsx26yoyo a given yo-yo mass maximizes the efficiency and performance hoopsx2y6oyo the hoopsx26yojo, resulting in a superior toy.

As the player repeatedly throws the yo-yo the noose squeezes and pinches the finger. Duncan could not maintain its TV advertising budget for such a low-priced item, and the yo-yo market eventually crashed in the late s.

One day stopover in Philadelphia in led to the sales of 3 million yo-yos. The axle is threadably engaged into the hub aperture 23 and positions each hub, and each web, in a spaced relationship that can be varied by rotating, or twisting one or both hubs relative to the axle.


Positioned between each hub on the axle are two O-rings 17, two bearing washers 18, two O-ring washers 18a, and a roller bearing That burst of color on schoolyards and hoops26yoyo back yards is not the autumn leaves, but yo-yos on the end of strings.

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The player “throws” the yo-yo, transferring kinetic energy to the yo-yo, which unwinds the string causing the yo-yo to spin about its axle. Rather than send demonstrators from town to town, Caffrey hired James Watson, a professor of astronomy and physics at Ball State University, and his wife, Nancy, a middle-school science teacher in Muncie, Ind. The apparatus of claim 15, and further comprising a substantially cylindrical sleeve for protectively covering a leash that connects the yo-yo to hoopsx26yooyo finger of a player.

A yo-yo kit for use with a string, comprising in combination: Also, as shown in FIGS. The band outer surface 33 represents the yo-yo maximum radius of The prior method uoopsx26yoyo attachment to the finger is to tie hoopss26yoyo loop at the end of string and then pull a section of string through the loop forming a noose that is pulled over the finger FIG.

On another group of students. A Toy Flywheel, Hoopxx26yoyo Scientist The radius of band 15 is measured from the center of the axle to the center of the band, and the band is preferably 3 millimeters wide, therefore band outer surface 33 establishes a preferred maximum yo-yo radius of An alternate embodiment of the invention may be constructed with straight webs, or integral hoopdx26yoyo and bands, or the bands, rings, and webs could have different radii and weights.

New string 55 is then inserted into the leash 52, forming the opening, or noose 54 through which the player’s finger 40 is inserted.

As shown in the drawings for purposes of illustration, and throughout this description, the preferred embodiment and examples shown should be considered as exemplars, rather than as limitations on the present invention.

In this embodiment the leash 52 is somewhat longer than the sleeve The apparatus according to claim 1, wherein a ratio between the weight of the hoop and the weight of the web is at least 1.


A yo-yo spinning at the end of a string is known as “sleeping. However, a yo-yo with enhanced performance exerts higher stresses on the yo-yo string hoopsx62yoyo is attached to the finger of the player.

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Double check your email and try again, or email webteam spokesman. The kinetic energy, K, of a spinning, or rotating rigid body like a yo-yo is expressed by the equation: The apparatus of claim hoopsx26yoto, further comprising a plurality of washers for fixing the inner race relative to the axle assembly while allowing the outer race to rotate relative to the axle assembly.

Both O-ring and bearing washers are preferably cone shaped, are made of spring steel and ideally are of the “Belleville” type. Another aspect of the present invention includes a yo-yo string finger guard that is comprised of a flexible sleeve having a longitudinal aperture, with a flexible leash slidably positioned in the longitudinal aperture.

USA – Ultra performance modular yo-yo with string finger guard – Google Patents

Other embodiments While I have illustrated and described my invention by means of specific embodiments, it is to be understood that numerous changes and modifications may be made therein without departing from the spirit and the scope of the invention as shown in the appended claims. The yo-yo can now hoopsx26yyoyo quickly, and easily adjusted to optimize sleep characteristics as string 9 wears.

The apparatus of claim 1, wherein each web comprising a hub threadably engaging onto the axle assembly so that the spaced apart relationship between the two hubs is variable. Duncan fashioned one out of glass and string, set up a company and recruited Filipinos to tour hoopsx26yoy schools of America as yo-yo experts.