Game ball for confined field of use/play

摘要

A game ball of composite construction, having a spherical hollow shell, with a pattern of perforation or holes arranged on and through the surface thereof, to substantially increase the aerodynamic drag upon the composite, and thereby effective reduce the distance the composite can travel upon being struck by a bat or club. In order to modulate and better emulate or mimic the feel and track of the composite in play, the composite is further modified by the inclusion of a plurality of randomly ordered discrete spherical elements, within said hollow shell, to effectively displacing about 50% of the interior volume of the hollow shell, and thereby contributing from about 20% up to about 75% to the mass of said composite In the composite embodiment of this invention game ball is a golf ball.

主权项

1. In a practice golf ball having a hollow core and a shell wall with multiple perforations therein to modulate aerodynamic resistance (drag) of said practice golf ball, and thereby reduce the distance of travel when struck by a golf club, wherein the improvement comprising
A. Composite structure having a shape conforming in overall dimensions to a golf ball, and mass defined by a
a. hollow spherical shell with (i) a defined interior volume and mass, having at least 50% of said interior volume of said shell being displaced with randomly arranged discrete spherical elements, and (ii) a pattern of holes in said shell, ranging from about 7/32″ to about 9/32′, in diameter, for effectively increasing aerodynamic drag of said practice golf ball in flight, and thereby reducing said distance of travel of said practice golf ball, when struck by a golf club, from about 25 to about 75% and,b. a plurality of discrete spherical elements within said hollow spherical shell, arranged in random order, so as to displace at least 50% of said interior volume within said hollow spherical shell, and increase said mass of said composite, thereby contributing from about 20% up to about 75% to the mass of said composite, B. An abrasion resistance coating on said hollow spherical shell of said composite.