Invention Grant
- Patent Title: Golf ball and die for molding the same
- Patent Title (中): 高尔夫球和模具成型相同
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Application No.: US11960132Application Date: 2007-12-19
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Publication No.: US07780887B2Publication Date: 2010-08-24
- Inventor: Katsunori Sato , Atsushi Mitamura
- Applicant: Katsunori Sato , Atsushi Mitamura
- Applicant Address: JP Tokyo
- Assignee: Bridgestone Sports Co., Ltd.
- Current Assignee: Bridgestone Sports Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Main IPC: B29C45/14
- IPC: B29C45/14

Abstract:
There are provided a golf ball in which the depths of dimples after grinding, which greatly affect the trajectory of golf ball, can be controlled readily and exactly, and a golf ball molding die for manufacturing the golf ball. The golf ball molding die in accordance with the present invention comprises two die bodies in which a cavity for molding a golf ball is formed by joining the die bodies to each other; and a protrusion formed on the cavity side surface of at least one of the die bodies, the protrusion having a uniform height from the surface or an imaginary spherical surface on which the protrusion is assumed to be absent toward the center of the cavity, wherein when a parting line is at latitude zero degree, the protrusion is arranged in the range of from latitude about 10 degrees to latitude about 80 degrees.
Public/Granted literature
- US20090160088A1 GOLF BALL AND DIE FOR MOLDING THE SAME Public/Granted day:2009-06-25
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