Sponge eggball

Abstract

An egg-shaped sponge rubber or foam elastomeric plastic ball having a unique combination of texture, size, weight and sponge material compositional features such that it can be thrown and bounced in a controllable manner, after the user develops a certain level of skill. Methods of manufacture and very safe indoors and out-of-doors in use in exercise, entertainment and sports training are also described. The sponge eggball has a major to minor axis ratio on the order of 1.3 to 1.6 and more preferably in the range of 1.4 to 1.5, a major axis dimension in the range of about 21/2" to 41/2", a mass on the order of from 30 to 90 grams, and preferably in the range of from 50 to 70 grams, and optionally an exterior skin surface that while smooth, is grippable. The density is between about 5 to 20 psi and preferably from about 10 to 12 psi by ASTM #D-1056. In the preferred embodiment, the sponge is provided in several graded levels in sizes from 3-4" along the major axis. A first, or "easy" grade comprises a very soft sponge eggball of slow rebound for children and beginners, and is particularly safe for indoor use. A more dense sponge eggball may be provided for an intermediate skill, 2nd level training, and outdoor use.

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