Invention Application
- Patent Title: MULTI-LAYER CORE GOLF BALL HAVING OPPOSING HARDNESS GRADIENT WITH STEEP GRADIENT OUTER CORE LAYER
- Patent Title (中): 多层核心高尔夫球具有对比度硬度梯度与梯级外核心层
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Application No.: US13195083Application Date: 2011-08-01
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Publication No.: US20110287861A1Publication Date: 2011-11-24
- Inventor: Michael J. Sullivan , Derek A. Ladd , Brian Comeau
- Applicant: Michael J. Sullivan , Derek A. Ladd , Brian Comeau
- Main IPC: A63B37/06
- IPC: A63B37/06 ; A63B37/00

Abstract:
A golf ball comprising an inner core having an outer surface and a geometric center and being formed from a substantially homogenous composition such that the geometric center has a hardness of 56 to 80 Shore C and the outer surface has a hardness of 50 to 75 Shore C. An outer core layer is disposed about the inner core and has an outer surface having a hardness of 85 to 98 Shore C and an inner surface having a hardness of 68 to 78 Shore C and being formed from a second substantially homogenous rubber composition. A cover layer is disposed about the outer core layer. The hardness of the second outer surface is greater than the hardness of the inner surface to define a positive hardness gradient of +7 to +30 Shore C, and the hardness of the first outer surface is lower than the hardness of the geometric center to define a negative hardness gradient of −1 to −15 Shore C.
Public/Granted literature
- US08257200B2 Multi-layer core golf ball having opposing hardness gradient with steep gradient outer core layer Public/Granted day:2012-09-04
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