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    • 52. 发明申请
    • Softball with great resilient coefficient
    • 弹球系数很高的垒球
    • US20050143205A1
    • 2005-06-30
    • US10746693
    • 2003-12-29
    • Wen Yang
    • Wen Yang
    • A63B37/02
    • A63B37/02A63B2102/182
    • A softball associated with the game of softball comprises a core, an inner cover and an outer cover. The core is made by a mold and of either a cork material or a polyurethane material. The inner cover surrounds said core, being made of a material different from the core and selected from the group of a cork-type material and a polyurethane-type material. The outer cover surrounds both the core and the inner cover. The softball thus formed can sustain substantially constant hardness against variations in temperature and humidity. Further, by adjusting the ratio of thickness of the core and the inner cover, the softball can attain a higher coefficient of resilience as required.
    • 与垒球游戏相关联的垒球包括铁芯,内盖和外盖。 芯由模具和软木材料或聚氨酯材料制成。 内盖围绕所述芯,由不同于芯的材料制成,并且选自软木型材料和聚氨酯类材料。 外盖包围芯和内盖。 这样形成的垒球可以抵抗温度和湿度的变化来维持基本上恒定的硬度。 此外,通过调整芯部和内罩的厚度比,垒球可以根据需要获得更高的弹性系数。