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公开(公告)号：US20250041673A1
公开(公告)日：2025-02-06
申请号：US18775191
申请日：2024-07-17
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Hideo WATANABE
IPC: A63B37/00
Abstract: The present invention provides a golf ball including a two-layer core having an inner layer core and an outer layer core, an intermediate layer, and a cover, in which a large number of dimples are formed on an outer surface of the cover, and a relationship between a surface hardness of an intermediate layer-encased sphere and a ball surface hardness satisfies the following condition:
(ball surface hardness)-
公开(公告)号：US20240131401A1
公开(公告)日：2024-04-25
申请号：US18486703
申请日：2023-10-12
Applicant: BRIDGESTONE SPORTS CO., LTD.
Inventor： Hideo WATANABE
CPC classification number: A63B37/0075 , A63B37/0063 , A63B37/0084 , A63B37/0087 , A63B37/00922 , C08L9/06 , A63B37/0076 , C08L2205/025
Abstract: A golf ball includes a core, an intermediate layer, and a cover, in which an initial velocity is not more than 76.0 m/s, a deflection when the ball is compressed under a specific load is at least 2.8 mm, and letting a value of (initial velocity of core×weight of core) be Ciw, a value of [(initial velocity of intermediate layer-encased sphere−initial velocity of core)×(weight of intermediate layer-encased sphere−weight of core)] be Miw, and a value of [(initial velocity of ball−initial velocity of intermediate layer-encased sphere)×(weight of ball−weight of intermediate layer-encased sphere)] be CViw, the condition is of Ciw+Miw+CViw≤2,550 is satisfied, thereby to be capable of making a distance for reducing a distance on shots with a driver and an iron by average hitters smaller.
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公开(公告)号：US20230381597A1
公开(公告)日：2023-11-30
申请号：US18304632
申请日：2023-04-21
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Hideo WATANABE , Akira KIMURA
CPC classification number: A63B37/00922 , A63B37/0075 , A63B37/0063 , A63B37/0064 , A63B37/0065 , A63B37/009 , A63B37/0096 , C08K13/02 , A63B2209/00
Abstract: In a golf ball for professional golfers and skilled amateurs which has a single-layer core, a cover and at least one intermediate layer therebetween, the sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere) and the ball have a surface hardness relationship therebetween which satisfies the condition:
(surface hardness of intermediate layer-encased sphere)>(surface hardness of ball).
Moreover, the core has a diameter of from 35.5 to 39.5 mm and a unique hardness profile that satisfies certain specific conditions. This ball is endowed with both an excellent flight performance and a good durability to repeated impact.-
公开(公告)号：US20230381596A1
公开(公告)日：2023-11-30
申请号：US18305872
申请日：2023-04-24
Applicant: BRIDGESTONE SPORTS CO, LTD.
Inventor： Hideo WATANABE
CPC classification number: A63B37/0075 , A63B37/0063 , A63B37/009 , A63B37/0096 , C08K5/14 , A63B37/0051 , A63B37/0082 , C08K3/30 , C08K5/098 , A63B37/00922
Abstract: A golf ball having a single-layer rubber core, a single-layer resin cover and one intermediate layer therebetween satisfies the following conditions:
(Shore C hardness at surface of intermediate layer-encased sphere)>(Shore C hardness at ball surface),
14≤(Atti compression of core)≤38,
(Atti compression of core)/(Shore C hardness at core surface−Shore C hardness at core center)≤1.1, and
600≤(Shore C hardness at surface of intermediate layer-encased sphere)×(specific gravity of intermediate layer material)×[volume (cm3) of intermediate layer material].
This ball has a superior distance performance on full shots with an iron and a high spin performance in the short game, imparts a very soft feel and possesses an excellent durability to cracking on repeated impact. The ball is intended to satisfy the needs of primarily skilled amateur golfers who handle iron shots skillfully.-
公开(公告)号：US20230310947A1
公开(公告)日：2023-10-05
申请号：US18193842
申请日：2023-03-31
Applicant: BRIDGESTONE SPORTS CO.,LTD.
Inventor： Hideo WATANABE
IPC: A63B37/00
CPC classification number: A63B37/0039 , A63B37/0033 , A63B37/0034 , A63B37/0043 , A63B37/0045 , A63B37/0046
Abstract: In a multi-piece solid golf ball having a core, an envelope layer, an intermediate layer and a cover, the core is formed of one or more layer of a rubber composition; the envelope layer, intermediate layer and cover are each formed of a single layer of resin material; the hardness relationship among the layers satisfies the following two conditions:
material hardness of cover>material hardness of intermediate layer, and
material hardness of envelope layer≥surface hardness of core;
the ball additionally satisfies the condition:
envelope layer thickness (mm)×envelope layer material hardness (Shore D hardness) cover thickness (mm)×cover material hardness (Shore D hardness); and the core and ball have optimized deflections when subjected to a specific loading. This ball serves as a distance ball which enables a superior distance to be achieved on full shots with a driver and with irons.-
Patent Agency Ranking
公开(公告)号：US20230092473A1
公开(公告)日：2023-03-23
申请号：US17897960
申请日：2022-08-29
Applicant: BRIDGESTONE SPORTS CO., LTD.
Inventor： Hideo WATANABE , Akira KIMURA
Abstract: A golf ball having a single-layer rubber core, a single-layer resin cover and one intermediate layer therebetween satisfies the following conditions: (Shore C hardness at surface of intermediate layer-encased sphere)>(Shore C hardness at ball surface), (Atti compression of core)/(Shore C hardness at core surface−Shore C hardness at core center)≤1.1, and (Shore C hardness at surface of intermediate layer-encased sphere)/{(Shore C hardness at core surface−Shore C hardness at core center)×intermediate layer thickness (mm)}≤2.7. This ball has a superior distance performance on full shots with an iron and a high spin performance in the short game, imparts a very soft feel and possesses an excellent durability to cracking on repeated impact. The ball is intended to satisfy the needs of skilled amateur golfers who handle iron shots skillfully.
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公开(公告)号：US20220280840A1
公开(公告)日：2022-09-08
申请号：US17678298
申请日：2022-02-23
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Hideo WATANABE
IPC: A63B37/00
Abstract: In a multi-piece solid golf ball having a core, envelope layer, intermediate layer and cover, the core is formed primarily of a base rubber, the core has a diameter of at least 30 mm, the envelope layer is formed as two layers—an inner layer and an outer layer, and the intermediate layer and the cover are each formed as single layers of a resin material. The core and the respective layer-encased spheres have surface hardnesses which satisfy specific relationships, the Shore C hardness value obtained by subtracting the core center hardness from the core surface hardness is 16 or more, and certain layers have respective thicknesses which satisfy specific conditions. This ball achieves a good distance on full shots both with a driver and with irons, is superior in the short game, and moreover has a good feel at impact and an excellent scuff resistance.
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公开(公告)号：US20210346766A1
公开(公告)日：2021-11-11
申请号：US17225652
申请日：2021-04-08
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Hideo WATANABE
IPC: A63B37/00
Abstract: In a golf ball having a core, envelope layer, intermediate layer and cover, the (core diameter)/(ball diameter) value falls within a particular range, the core has a specific hardness profile, and the Shore C hardness relationships among the core center and surface hardnesses and the surface hardnesses of the envelope layer-encased sphere, intermediate layer-encased sphere and ball satisfy the following conditions: core surface hardness ball surface hardness, (envelope layer-encased sphere surface hardness)−(core center hardness)≥28, and (intermediate layer-encased sphere surface hardness)−(core center hardness)≥39. Also, the envelope layer, intermediate layer and cover have thicknesses which satisfy the condition: cover thickness
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公开(公告)号：US20210170237A1
公开(公告)日：2021-06-10
申请号：US17087810
申请日：2020-11-03
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Hideo WATANABE
IPC: A63B37/00
Abstract: A golf ball for amateur golfers is endowed with an excellent flight and a good feel at impact that is soft yet solid when hit by a golfer whose head speed is not very high. The ball, which includes a core and a cover, has a compressive deformation B when subjected to a final load of 30 kgf from an initial load state of 5 kgf that is from 0.72 to 0.97 mm and a compressive deformation C when subjected to a final load of 60 kgf from an initial load state of 5 kgf that is from 1.55 to 1.85 mm. In addition, the core has a hardness profile which satisfies specific conditions.
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公开(公告)号：US20210101053A1
公开(公告)日：2021-04-08
申请号：US17123246
申请日：2020-12-16
Applicant: Bridgestone Sports Co., Ltd.
Inventor： Hideo WATANABE , Akira KIMURA , Jun SHINDO
IPC: A63B37/00
Abstract: In a multi-piece solid golf ball having a core, an envelope layer, an intermediate layer and a cover, the core, an intermediate layer-encased sphere and the ball have surface hardnesses which satisfy a specific relationship, and the envelope layer, the intermediate layer and the cover have thicknesses which satisfy a specific relationship. Also, the core has a hardness profile in which the hardnesses at the core surface, core center, a position 5 mm from the core center, and a position midway between the surface and center of the core satisfy specific relationships. This golf ball, when used by mid- and high-level amateurs, enables the golfer to maintain an adequate distance on shots with a driver and achieve a good distance on iron shots, has a good spin performance on approach shots and has a good feel on impact. In addition, the ball has an excellent scuff resistance when struck with a grooved wedge.
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