Unlock instant, AI-driven research and patent intelligence for your innovation.

Golf ball

a technology of golf balls and ball bearings, applied in the field of golf balls, can solve the problem that golf players are insensitive to the feel of impact, and achieve the effects of excellent resilience performance, excellent aerodynamic characteristic, and low spin ra

Inactive Publication Date: 2018-06-14
SUMITOMO RUBBER IND LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The golf ball in this patent has exceptional bouncing performance when hit with a driver. It also has a unique pattern that helps it fly smoothly through the air. This ball has both very good flight and feel when hit with a putter.

Problems solved by technology

Therefore, golf players are insensitive to the feel at impact when hitting golf balls with these clubs.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Golf ball
  • Golf ball
  • Golf ball

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0235]A rubber composition A was obtained by kneading 100 parts by weight of a high-cis polybutadiene (trade name “BR-730”, manufactured by JSR Corporation), 25.5 parts by weight of zinc diacrylate, 12 parts by weight of zinc oxide, an appropriate amount of barium sulfate, 0.9 parts by weight of dicumyl peroxide, 0.5 parts by weight of diphenyl disulfide, 0.1 parts by weight of 2-naphthalenethiol, and 2 parts by weight of benzoic acid. This rubber composition A was placed into a mold including upper and lower mold halves each having a hemispherical cavity, and heated at 160° C. for 20 minutes to obtain a core with a diameter of 38.6 mm. The amount of barium sulfate was adjusted such that a core having a predetermined weight was obtained.

[0236]A resin composition (a) was obtained by kneading 26 parts by weight of an ionomer resin (the aforementioned “Himilan AM7337”), 26 parts by weight of another ionomer resin (the aforementioned “Himilan AM7329”), 48 parts by weight of a styrene bl...

example 8

[0241]A rubber composition B was obtained by kneading 100 parts by weight of a high-cis polybutadiene (trade name “BR-730”, manufactured by JSR Corporation), 22.5 parts by weight of zinc diacrylate, 12 parts by weight of zinc oxide, an appropriate amount of barium sulfate, 0.9 parts by weight of dicumyl peroxide, 0.5 parts by weight of diphenyl disulfide, 0.1 parts by weight of 2-naphthalenethiol, and 2.0 parts by weight of benzoic acid. This rubber composition B was placed into a mold including upper and lower mold halves each having a hemispherical cavity, and heated at 160° C. for 20 minutes to obtain a core with a diameter of 36.6 mm. The amount of barium sulfate was adjusted such that a core having a predetermined weight was obtained.

[0242]A resin composition (a) was obtained by kneading 26 parts by weight of an ionomer resin (the aforementioned “Himilan AM7337”), 26 parts by weight of another ionomer resin (the aforementioned “Himilan AM7329”), 48 parts by weight of a styrene ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
central angleaaaaaaaaaa
central angleaaaaaaaaaa
total thicknessaaaaaaaaaa
Login to View More

Abstract

A golf ball includes a core, one or more mid layers, a cover, and dimples. A central hardness Ho and a surface hardness Hs of the core, a hardness Hm(min) of a layer having a lowest hardness among the mid layers, and a hardness Hc of the cover satisfy the following mathematical formulas (i) to (iv).Hs−Ho>15  (i)Hc−Hm(min)>20  (ii)−10<Hm(min)−Ho<15  (iii)5<Hc−Hs<20  (iv)

Description

[0001]This application claims priority on Patent Application No. 2016-242294 filed in JAPAN on Dec. 14, 2016. The entire contents of this Japanese Patent Application are hereby incorporated by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to golf balls. Specifically, the present invention relates to golf balls including a core, a mid layer, a cover, and dimples.Description of the Related Art[0003]The face of a golf club has a loft angle. When a golf ball is hit with the golf club, backspin due to the loft angle occurs in the golf ball. The golf ball flies with the backspin.[0004]The greatest interest to golf players concerning golf balls is flight distance. Golf players particularly place importance on flight distances upon shots with drivers. There have been various proposals for improvement of flight performance. JP2010-188199 discloses a golf ball including a core having a high hardness at the surface thereof and a low hardness at ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): A63B37/00A63B45/00
CPCA63B37/0012A63B37/0063A63B37/0043A63B37/0033A63B37/0017A63B37/0075A63B37/0076A63B37/008A63B37/0064A63B37/0066A63B37/0083A63B45/00A63B37/0018A63B37/0019A63B37/0006A63B37/0031A63B37/0045A63B37/00921A63B37/00622A63B37/00621A63B37/00
Inventor TAKIHARA, HIRONORISAJIMA, TAKAHIROMIMURA, KOHEI
Owner SUMITOMO RUBBER IND LTD