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US 8,178,200 B2Granted
String for sport rackets
AssigneeYao I Fabric Co., Ltd.
InventorTsan-Ching Wang
Life of this patent
Estimating the term…
Abstract
A sport racket string includes a string which is a solid string and multiple recesses are defined in an outer surface of the string. The recesses include different sizes, depths and shapes, and are located in pre-determined ways such as lines so as to increase the friction between the balls and the string. The strings of the present invention are light in weight and allow the users to control the balls efficiently.
Claims18
A sport racket string comprising:
- a string being a solid string, and
- at least one recess group defined in an outer surface of the string;
- wherein the at least one recess group includes first recesses and second recesses, a depth and a diameter of the first recesses are deeper and larger than a depth and a diameter of the second recesses, the first recesses and the second recesses are located alternatively on different cross sections of the string.
Dependencies are inferred from the claim text.