| 摘要 |
A sports-training ball assembly including a ball having an outer surface. The ball is a manually operated sports ball. The assembly includes an elastic cover coupled about the ball, wherein the elastic cover has a resting volume smaller than the volume of the outer surface of the ball such that the elastic cover is tightly coupled thereto. The cover completely encloses the ball. The cover includes an outer surface having a coefficient of friction smaller than a coefficient of friction of the outer surface of the ball such that the cover is slick compared to the ball. The elastic cover includes an elastic aperture therethrough sized to permit entry and exit of the ball therethrough so that the ball may be removed from and installed within the cover. The elastic cover includes elastane fibers. The cover consists of a single layer of fabric. |
