| 发明名称 |
Baseball with improved core and enhanced durability |
| 摘要 |
A baseball capable of being tested under ASTM F1887-09 wherein the baseball is projected at a strike plate at a speed of approximately 60 mph to measure the COR of the baseball. The baseball includes a core formed of a diene-based rubber composition, at least one layer of yarn surrounding the core, and a cover assembly surrounding the one layer of yarn. The core has a diameter of less than 2.0 inches and a weight less than 1.5 ounces. The baseball has a circumference of less than 9.5 inches and a weight of less than 5.5 ounces. The baseball has an initial COR value when tested in accordance with ASTM F1887-09 and a second COR value measured after the baseball has undergone at least 60 impacts of approximately 60 mph against the strike plate. The second COR value is greater than 95 percent of the initial COR value. |
| 申请公布号 |
US8771114(B2) |
申请公布日期 |
2014.07.08 |
| 申请号 |
US201113177026 |
申请日期 |
2011.07.06 |
| 申请人 |
Wilson Sporting Goods Co. |
发明人 |
Markovich Michael;Udelhofen Patrick J.;Simonutti Frank M.;Tong Benny;Gaff Bradley L.;Goodwin Ty B. |
| 分类号 |
A63B37/02 |
主分类号 |
A63B37/02 |
| 代理机构 |
|
代理人 |
O'Brien Terence P. |
| 主权项 |
1. A baseball capable of being tested under ASTM Standard Test Method F1888-09 for compression-displacement and under ASTM Standard Test Method F1887-09 wherein the baseball is projected at a strike plate at a speed of approximately 60 mph to measure the coefficient of restitution (COR) of the baseball, the baseball comprising:
a core formed of a diene-based rubber composition, the core having a diameter of less than 2.0 inches and a weight less than 1.5 ounces; at least one layer of yarn surrounding the core; and a cover assembly surrounding the at least one layer of yarn, the baseball having a circumference within the range of 8.85 inches to 9.5 inches and a weight of less than 5.5 ounces, the baseball having an initial compression value obtained in accordance with ASTM Standard Test Method F1888-09 and a second compression value obtained in accordance with ASTM Standard Test Method F1888-09 after the baseball has undergone at least 60 impacts of approximately 60 mph against the strike plate, the second compression value being greater than 75 percent of the initial compression value, the initial compression of the baseball being at least 200 lbs. |
| 地址 |
Chicago IL US |
