MULTI-LAYER GOLF BALL
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United States of America Patent
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Issued Date -
May 21, 2015
app pub date -
Nov 21, 2013
filing date -
Nov 21, 2013
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Abstract
A multi-layer golf ball includes a core formed from an ionomer, an intermediate layer surrounding the core, and a cover surrounding the intermediate layer. The core has a material hardness measured on the JIS-C scale of from about 34 to about 70, and has an outer surface that includes a plurality of land portions aligned on a common sphere, and a plurality of grooves separating the respective land portions and extending radially inward from the sphere. The common sphere has a diameter of from about 22 mm to about 32 mm. The intermediate layer is formed from a rubber material and has a radial thickness measured from the common sphere of from about 4.0 mm to about 9.0 mm. Additionally, the core has a 10-130 kg compression deformation of from about 3.5 to about 5.5 mm.
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