Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1985-02-01
1986-10-14
Marlo, George J.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
273 58K, A63B 3906
Patent
active
046168281
ABSTRACT:
Disclosed is a tennis ball including a continuous or discontinuous groove formed in the rubber spherical core. The groove extends about the spherical core below a track formed between two felt cover members. The groove of the spherical core controllably regularizes the air turbulence of the ball during its trajectory, and minimizes changes in air turbulence by wear or fuzzing up of the nap of the felt cover members attached to the ball. Also disclosed is an alternate embodiment for controllably regularizing the air turbulence around a tennis ball during its trajectory, using woven monofilament or multifilament synthetic fiber cover members. The diameter of the fibers and the spacing between the warp and weft fibers controls the size of exposed surface areas of the spherical core and the depth of air pockets formed between the intersecting fibers. The air pockets create a dimpled effect to control the loft or dip of the tennis ball during its trajectory. The synthetic fibers also increase the useful life of the ball, having increased strength over customary natural fibers.
REFERENCES:
patent: 398558 (1889-02-01), Waddington
patent: 1240866 (1917-09-01), Miller
patent: 1287766 (1918-12-01), Saunders
patent: 1376778 (1921-05-01), Orr
patent: 2023672 (1935-12-01), Ellis
patent: 2453143 (1948-11-01), Lejeune
patent: 2495079 (1950-01-01), Sonnett et al.
patent: 4284276 (1981-08-01), Worst
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