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Multi-piece solid golf ball

a golf ball and golf ball technology, applied in the field of multi-piece solid golf balls, can solve the problems of significant drawbacks of low hs players, and achieve the effects of reducing distance, specific deflection ratio therebetween, and reducing distance traveled by the ball

Inactive Publication Date: 2013-08-01
BRIDGESTONE SPORTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a new way to make golf balls with improved performance. By using low- Trajectory dimples and a specific interior structure, the ball can have a reduced distance when striking at a high speed, while also maintaining its performance at a lower speed. This results in a more consistent and accurate shot. The technical effect is a more efficient and effective golf ball for players of all levels.

Problems solved by technology

As a result, such balls have significant drawbacks for low HS players.

Method used

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examples

[0170]The following Examples and Comparative Examples are provided by way of illustration and not by way of limitation.

examples 1 to 5

, Comparative Examples 1 to 5

[0171]The rubber compositions shown in Table 1 were prepared, then molded and vulcanized at 155° C. for 15 minutes to produce solid cores. Numbers in the table indicate parts by weight.

TABLE 1ABCDFormulationPolybutadiene100100100(parts byrubber (1)weight)Polybutadiene100rubber (2)Zinc acrylate28.527.536.527.0Peroxide (1)0.30.31.10.3Peroxide (2)0.30.30.3Zinc oxide5555Barium sulfate19.019.115.416.2Calcium carbonate5Zinc stearate5555Antioxidant0.10.10.20.1Zinc salt of0.511pentachloro-thiophenolSulfur0.09Specific gravity1.1741.1741.1741.174

[0172]Trade names of the materials in the table are as follows.[0173]Polybutadiene rubber (1): Available under the trade name “BR 730” from JSR Corporation.[0174]Polybutadiene rubber (2): Available under the trade name “BR 01” from JSR Corporation.[0175]Zinc acrylate: Available from Nihon Jyoryu Kogyo Co., Ltd.[0176]Peroxide (1): Dicumyl peroxide, available under the trade name “Percumyl D” from NOF Corporation.[0177]Perox...

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Abstract

The invention provides a multi-piece solid golf ball having a solid core, an inner cover layer and an outer cover layer, which outer cover layer has numerous dimples on a surface thereof. The ball is characterized both in that the core and the inner cover layer are formed so as to have a specific deflection ratio therebetween, and also by the combination of an inner cover layer formed to a specific material hardness and thickness, an outer cover layer formed to a specific material hardness, and dimples which satisfy specific conditions. This multi-piece solid golf ball is able to substantially reduce the distance traveled by the ball when struck at a high head speed, while at the same time holding down the decrease in distance when struck at a low head speed.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a continuation-in-part of copending application Ser. No. 12 / 757,829 filed on Apr. 9, 2010, the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]The present invention relates to a multi-piece solid golf ball having a solid core, an inner cover layer and an outer cover layer, and having numerous dimples on a surface of the outer cover layer. More specifically, the invention relates to a multi-piece solid golf ball which substantially reduces the distance traveled by the ball when struck at a high head speed (head speed is sometimes abbreviated below as “HS”) while at the same time undergoing little reduction in distance when struck at a low HS.[0003]With recent advances in golfing equipment such as balls and clubs, golf balls have come to travel increasing distances. For this reason, to keep play fair, strict rules have been adopted which establish, in the case of a golf club,...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A63B37/00
CPCA63B37/0004A63B37/0096A63B37/0006A63B37/0012A63B37/0016A63B37/0017A63B37/0018A63B37/0019A63B37/002A63B37/0021A63B37/0031A63B37/0033A63B37/0035A63B37/0043A63B37/0045A63B37/0064A63B37/0065A63B37/0066A63B37/0075A63B37/0077A63B37/008A63B37/0083A63B37/0084A63B37/009A63B37/0092A63B37/0029A63B37/00065A63B37/00215A63B37/00922
Inventor UMEZAWA, JUNJISATO, KATSUNORIHIGUCHI, HIROSHINAKAGAWA, TAKUMA
Owner BRIDGESTONE SPORTS
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