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US 7,546,724 B2Granted
Sport racket strings with hollow center core
AssigneeYao I Fabric Co., Ltd.
InventorTsan-Ching Wang
Life of this patent
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Abstract
A string for sport rackets includes a center core having at least one first hollow portion extending in an axial direction of the center core and at least one layer wrapped around the center core. The at least one layer is composed of a plurality of first periderm wires which are spirally or alternatively wrapped on the center core.
Claims12
A string for sport rackets, comprising:
- an axially extended center core having a uniform sectional contour therealong, the center core having at least one first hollow portion extending axially therethrough, the first hollow portion extending in unfilled and radially enclosed manner within the center core;
- and,
- a first outer layer including a plurality of first periderm wires wrapped about the center core.
A string for sport rackets, comprising:
- a plurality of wires bundled as a string and each of the wires having a uniform sectional contour and defining at least one first hollow portion extending axially therethrough, the first hollow portion extending in unfilled and radially enclosed manner within each of the wires;
- and,
- a coat layer wrapped on the bundle of the wires.
Dependencies are inferred from the claim text.