Patents Assigned to Bridgestone Sports Co., Ltd.
  • Publication number: 20200171358
    Abstract: A golf ball for amateur golfers is endowed with an excellent flight when hit by the average golfer whose head speed is not that high and also has a good feel at impact that is soft and solid on full shots with all golf club numbers. The golf ball, which includes a core and a cover, has a compressive deformation A under 0.2 kgf to 5 kgf loading that is 0.21 mm or less and a compressive deformation B under 5 kgf to 30 kgf loading that is from 0.73 to 0.95 mm. Also, letting D be the compressive deformation of the ball under 10 kgf to 130 kgf loading and C be the compressive deformation of the ball under 5 kgf to 60 kgf loading, the ratio D/A is from 16.0 to 20.5 and the ratio D/C is from 1.80 to 1.90.
    Type: Application
    Filed: October 28, 2019
    Publication date: June 4, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Hideo WATANABE, Katsunori SATO
  • Patent number: 10661125
    Abstract: The invention provides a golf ball having a core and a cover of one or more layer encasing the core, wherein the core has a center core and a foamed outer layer that directly, or indirectly through another layer, envelops the center core. The foamed outer layer is made of a rubber composition that includes a base rubber, a co-crosslinking agent and an organic peroxide. The foamed outer layer has an inside portion facing the ball center and an outside portion facing the outside of the ball that are unfoamed regions, and contains a foamed region in an intermediate portion therebetween. A method of manufacturing such a golf ball is also provided.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: May 26, 2020
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Jun Shindo, Tsuyoshi Nakajima
  • Publication number: 20200155905
    Abstract: A golf ball for amateur golfers is endowed with both an excellent flight and a good, soft feel at impact when hit by the average golfer whose head speed is not very high. The golf ball, which includes a core and a cover, has a compressive deformation A when the ball is subjected to a final load of 5 kgf from an initial load state of 0.2 kgf that is 0.18 mm or less, a compressive deformation B when the ball is subjected to a final load of 15 kgf from an initial load state of 5 kgf that is from 0.30 to 0.38 mm, a compressive deformation C when the ball is subjected to a final load of 60 kgf from an initial load state of 5 kgf that is from 1.70 to 2.03 mm and a compressive deformation D when the ball is subjected to a final load of 130 kgf from an initial load state of 10 kgf that is from 3.10 to 3.80 mm.
    Type: Application
    Filed: October 28, 2019
    Publication date: May 21, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Hideo WATANABE, Katsunori SATO
  • Patent number: 10653922
    Abstract: In a multi-piece solid golf ball having a core, a cover and an intermediate layer therebetween, the core, an intermediate layer-encased sphere and the ball have surface hardnesses which satisfy a specific relationship, and 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.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: May 19, 2020
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Hideo Watanabe, Akira Kimura, Jun Shindo
  • Publication number: 20200147455
    Abstract: To provide a golf ball that can prevent considerable decrease in carry distance of a driver shot when it rains and also can more reliably prevent adhesion of dirt, etc. to the surface of the golf ball. The golf ball of the present invention includes a core, a cover that is provided on an outer side of the core and is provided with dimples, and an outermost layer that is formed on an outer side of the cover and made of a material having a contact angle of 90° or more, a dynamic contact angle of 85° or less and an adhesive force of 130 ?N or less. The material for forming the outermost layer includes a urethane coating material with a water repellent additive.
    Type: Application
    Filed: November 25, 2019
    Publication date: May 14, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Hirotaka SHINOHARA, Takashi OHIRA
  • Patent number: 10639523
    Abstract: In a golf ball having a two-layer core consisting of an inner core layer and an outer core layer, an intermediate layer and a cover, the core is formed primarily of a base rubber, the diameter of the inner core layer is at least 21 mm, the intermediate layer and cover are each formed primarily of a resin material, the overall core has a specific hardness profile, the inner core layer has a higher specific gravity than the outer core layer, and the sphere consisting of the core encased by the intermediate layer has a higher surface hardness than the ball. This golf ball has a high initial velocity at impact while holding down the spin rate on full shots with a driver or long iron, enabling a good distance to be achieved. The ball also has a good controllability in the short game.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: May 5, 2020
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Hideo Watanabe, Akira Kimura, Masanobu Kuwahara
  • Patent number: 10632347
    Abstract: A method of manufacturing golf balls having a core and a cover of at least one layer encasing the core includes the steps of producing a core by molding and vulcanizing a rubber composition containing (A) a base rubber, (B) an ?,?-unsaturated carboxylic acid and/or a metal salt thereof, and (C) an organic peroxide; and heat-treating the core for 1 to 24 hours at between 175 and 300° C. Golf balls which undergo little energy loss and have a high initial velocity can be obtained by this method.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: April 28, 2020
    Assignees: BRIDGESTONE CORPORATION, Bridgestone Sports Co., Ltd.
    Inventors: Tsuyoshi Nakajima, Yuichiro Ozawa, Daisuke Nakajima
  • Publication number: 20200114217
    Abstract: A golf ball for amateur golfers is endowed with both an excellent flight and a good, solid feel at impact when hit by the average amateur golfer having a fast head speed. The golf ball, which includes a core and a cover, has a compressive deformation A when subjected to a final load of 5 kgf from an initial load of 0.2 kgf that is 0.18 mm or less, a compressive deformation B when subjected to a final load of 50 kgf from an initial load of 5 kgf that is from 0.85 to 1.16 mm and a compressive deformation C when subjected to a final load of 90 kgf from an initial load of 5 kgf that is from 1.90 to 2.25 mm.
    Type: Application
    Filed: September 17, 2019
    Publication date: April 16, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Hideo WATANABE, Katsunori SATO
  • Publication number: 20200114219
    Abstract: A golf ball for amateur golfers is endowed with both an excellent flight and a good, soft feel at impact when hit by the average golfer whose head speed is not very high. The golf ball, which includes a core and a cover, has a compressive deformation A when subjected to a final load of 5 kgf from an initial load of 0.2 kgf that is 0.18 mm or less, a compressive deformation B when subjected to a final load of 50 kgf from an initial load of 5 kgf that is from 1.30 to 1.69 mm and a compressive deformation C when subjected to a final load of 90 kgf from an initial load of 5 kgf that is from 2.45 to 2.90 mm.
    Type: Application
    Filed: September 27, 2019
    Publication date: April 16, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Hideo WATANABE, Katsunori SATO
  • Publication number: 20200108298
    Abstract: A golf ball paint composition includes primarily a urethane paint containing polyol as a base resin and polyisocyanate as a curing agent. The polyisocyanate includes two types of isocyanurate and adduct of hexamethylene diisocyanate and the golf ball paint composition has an elastic work recovery of at least 70%. The paint composition has a high self-repairing ability and is of high quality as a golf ball paint. Golf balls coated with this composition are able to maintain a good durability, in addition to which they have an excellent abrasion resistance and an excellent ball appearance.
    Type: Application
    Filed: November 25, 2019
    Publication date: April 9, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventor: Hirotaka Shinohara
  • Publication number: 20200108299
    Abstract: In a multi-piece solid golf ball made up of, successively, a core, an intermediate layer and a cover having numerous dimples on the surface thereof, the intermediate layer is formed of a resin material and the cover is formed of a urethane resin material, each having a specific respective Shore D hardness. The ball has a specific (intermediate layer thickness)/(core diameter) value and a specific (cover thickness)/(core diameter) value, and the core has a specific deflection and has a specific hardness profile from a center to a surface thereof. This golf ball provides an increased distance and has both a soft feel when played and a high durability to repeated impact.
    Type: Application
    Filed: November 19, 2019
    Publication date: April 9, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Hideo Watanabe, Katsunori Sato, Masanobu Kuwahara
  • Patent number: 10610741
    Abstract: In a golf ball having a core, an intermediate layer and a cover, the intermediate layer-encased sphere has a higher surface hardness than the ball. The core hardness profile in the ball is designed such that the core surface has a Shore C hardness value which is at least 28 higher than the Shore C hardness value at the core center, and the surface areas A to F calculated from hardness differences between positions located at specific distances in the core and differences between the specific distances satisfy a specific formula. This golf ball has an excellent flight performance when struck by skilled amateur golfers and professionals, and also has a good controllability on shots with an iron.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: April 7, 2020
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Hideo Watanabe, Masanobu Kuwahara
  • Patent number: 10603544
    Abstract: An evaluation method includes determining, by a computer processor, the times of occurrence of states of a golf ball during its contact with a collision surface, from the behavior of the golf ball based on its collision with the collision surface. A slide time or slide amount is calculated by the computer processor, based on the times of occurrence of the states. The slide time is a period from the start to the stop of a slide of the golf ball on the collision surface. The slide amount is the amount of the slide during the period. Information on the slide time or slide amount is output by the computer processor.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: March 31, 2020
    Assignee: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Takuichi Shimizu, Hirotaka Shinohara
  • Publication number: 20200086175
    Abstract: To provide a golf ball that can prevent a decrease in carry distance of a driver shot when it rains and also, can exert excellent spinning performance upon an approach shot. The golf ball of the present invention includes a core, a cover that is provided on an outer side of the core and is provided with dimples, and an outermost layer that is formed on an outer side of the cover and made of a material having a contact angle of 90° or more. The golf ball has a dynamic friction coefficient of 0.52 or more. The material constituting the outermost layer comprises a urethane coating that contains a water repellent additive, and the water repellent additive includes a fluorinated surfactant, silicone-modified acrylate or hydrophobic silica.
    Type: Application
    Filed: September 27, 2019
    Publication date: March 19, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Hirotaka SHINOHARA, Takashi OHIRA
  • Publication number: 20200086176
    Abstract: A multi-piece solid golf ball having a two-layer core with an inner core layer and an outer core layer and having a cover of at least two layers including an intermediate layer and an outer layer with numerous dimples on the surface is characterized in that the hardest cover layer has a specific material hardness and the ball has a specific value obtained by subtracting the surface hardness of the overall core from the surface hardness of the hardest cover layer, a specific deflection, and a specific value obtained by subtracting the initial velocity of the inner core layer from the initial velocity of the sphere consisting of the inner core layer encased by the outer core layer. This golf ball enables relatively low head speed golfers to achieve a good distance on full shots with drivers and iron clubs and also provides a soft, comfortable feel at impact.
    Type: Application
    Filed: March 21, 2019
    Publication date: March 19, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Katsunori SATO, Hideo WATANABE
  • Publication number: 20200078641
    Abstract: A resin composition for golf balls includes specific amounts of (A) polyurethane or polyurea and (B) an oxazoline group-containing acrylic polymer or an oxazoline group-containing styrene polymer. A golf ball having a core encased by a cover of one or more layers, wherein at least one cover layer is formed of this resin composition, exhibits a good adhesion between adjoining layers, enabling the ball to achieve a high scuff resistance without lowering the initial velocity of the ball.
    Type: Application
    Filed: November 19, 2019
    Publication date: March 12, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Katsunobu Mochizuki, Masahiro Yamabe, Atsushi Namba
  • Publication number: 20200078643
    Abstract: A golf ball for amateur golfers is endowed with both an excellent flight and a good feel at impact that is soft and solid when hit by the average golfer whose head speed is not very high. The golf ball, which includes a core and a cover, has a compressive deformation A when subjected to a final load of 5 kg from an initial load of 0.2 kg that is 0.21 mm or less, a compressive deformation B when subjected to a final load of 30 kg from an initial load of 5 kg that is from 0.72 to 0.90 mm and a compressive deformation C when subjected to a final load of 60 kg from an initial load of 5 kg that is from 1.55 to 1.80 mm.
    Type: Application
    Filed: August 14, 2019
    Publication date: March 12, 2020
    Applicant: Bridgestone Sports Co., Ltd.
    Inventors: Hideo Watanabe, Katsunori Sato
  • Patent number: 10576350
    Abstract: A simulation apparatus includes an obtaining unit configured to obtain a measurement result of a test shot of a first golf club performed by a testing golfer, and a calculation unit configured to calculate a simulated ball-striking result which is obtained if the testing golfer strikes a golf ball by a second golf club which has a specification different from the first golf club. The calculation unit determines a swing characteristic of the testing golfer based on the measurement result. The calculation unit calculates the simulated ball-striking result based on the swing characteristic and the measurement result.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: March 3, 2020
    Assignee: Bridgestone Sports Co., Ltd.
    Inventor: Tatsuya Ishikawa
  • Patent number: 10569133
    Abstract: A measurement system includes a first measurement unit configured to measure floor reaction forces of golfer's left and right legs, a second measurement unit that is attached to the upper body of a golfer and configured to measure an angular velocity of the golfer, and a processing unit. The processing unit calculates, based on measurement results of the first measurement unit and the second measurement unit, a first energy which is a kinetic energy of the golfer during a swing.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: February 25, 2020
    Assignee: Bridgestone Sports Co., Ltd.
    Inventor: Tomotaka Ishihara
  • Patent number: 10569140
    Abstract: In a golf ball having a core, a cover of at least one layer and a paint film layer formed on a surface of the cover, the paint film layer has an elastic work recovery of at least 60%, the cover layer in contact with the paint film layer has a material hardness on the Shore D scale of at least 55 and, letting M be the elastic work recovery (%) of the paint film layer and N be the material hardness (Shore D hardness) of the cover layer, M?N>0. The ball surface is scratch-resistant and has an excellent durability, and the ball has a reduced spin rate on shots with a driver or a long iron, resulting in an increased carry.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: February 25, 2020
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Hirotaka Shinohara, Takashi Ohira