Invention Grant
- Patent Title: Golf ball
- Patent Title (中): 高尔夫球
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Application No.: US12880667Application Date: 2010-09-13
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Publication No.: US08840493B2Publication Date: 2014-09-23
- Inventor: Hirotaka Nakamura , Keiji Ohama , Seiichiro Endo
- Applicant: Hirotaka Nakamura , Keiji Ohama , Seiichiro Endo
- Applicant Address: JP Kobe
- Assignee: SRI Sports Limited
- Current Assignee: SRI Sports Limited
- Current Assignee Address: JP Kobe
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2009-237818 20091015
- Main IPC: A63B37/06
- IPC: A63B37/06 ; A63B37/00

Abstract:
Golf ball 2 has spherical core 4, surrounding layer 6 situated on the external side of the core 4, mid layer 8 situated on the external side of the surrounding layer 6, cover 10 situated on the external side of the mid layer 8, and paint layer 12 situated on the external side of the cover 10. The mid layer 8 has a thickness Tm of 0.1 mm or greater and 1.2 mm or less. The ratio (Tc/Tm) of the thickness Tc of the cover 10 to the thickness Tm of the mid layer 8 is no greater than 0.50. The cover 10 has a Shore D hardness Hc of no greater than 35. The Shore D hardness Hm of the mid layer 8 is greater than the Shore D hardness Hc of the cover 10. The base material of the surrounding layer 6 is an ionomer resin. The base material of the mid layer 8 is a polyurethane. The base material of the cover 10 is a polyurethane.
Public/Granted literature
- US20110092315A1 GOLF BALL Public/Granted day:2011-04-21
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