Patent application number | Description | Published |
20110143862 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball comprising a core, an envelope layer encasing the core, an intermediate layer encasing the envelope layer, and a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples, wherein the core is made primarily of a rubber material and has a diameter of at least 31 mm, the envelope layer and intermediate layer are each made primarily of the same or different resin materials and the cover is made primarily of polyurethane; intermediate layer and cover have an optimized thickness relationship; the core, envelope layer, intermediate layer and cover have optimized hardness relationships; and the core surface and core center have a large hardness difference therebetween. The golf ball has an excellent flight performance and controllability that are acceptable to professionals and other skilled golfers, while also having an excellent durability to cracking on repeated impact and an excellent scuff resistance. | 06-16-2011 |
20120157234 | MULTI-PIECE SOLID GOLF BALL - A multi-piece solid golf ball has a core, at least one intermediate layer encasing the core, and a cover of at least one layer encasing the intermediate layer. The core is formed of a base rubber, and the intermediate layer and cover are each formed of a resin material. The intermediate layer has a thickness (a) and the cover has a thickness (b) such that the ratio a/b is from 0.7 to 1.9, and the core has a diameter (c) such that the ratio c/a with the intermediate layer thickness (a) is from 23 to 38. The intermediate layer has a material hardness (Shore D) of from 54 to 76, and the cover has a material hardness (Shore D) of from 47 to 69. The ball satisfies the following relationship: cover material hardnesscore surface hardness. This golf ball has an improved flight performance and a good, solid feel on impact. | 06-21-2012 |
20120157235 | MULTI-PIECE SOLID GOLF BALL - A multi-piece solid golf ball has a core, at least one intermediate layer encasing the core, and a cover of at least one layer encasing the intermediate layer. The core is formed of a base rubber, and the intermediate layer and cover are each formed of a resin material. The intermediate layer has a thickness (a) and the cover has a thickness (b) such that the ratio a/b is from 0.7 to 1.9, and the core has a diameter (c) such that the ratio c/a with the intermediate layer thickness (a) is from 23 to 38. The intermediate layer has a material hardness (Shore D) of from 42 to 76, and the cover has a material hardness (Shore D) of from 41 to 69. The ball satisfies the following relationship: cover material hardnesscore surface hardness, and wherein a Shore D hardness at the core surface minus a Shore D hardness at the core center is not more than 17 units. This golf ball has an improved flight performance and a good, solid feel on impact. | 06-21-2012 |
20120316008 | MULTI-PIECE SOLID GOLF BALL - In a multi-piece solid golf ball having a core, an envelope layer, an intermediate layer and a cover, the hardness profile at the core interior and the hardness relationships among the various layers are optimized. The ball is endowed with an excellent flight performance on shots with a driver and an excellent controllability in the short game that are acceptable to professionals and other skilled golfers. The ball also has a good feel at impact and an excellent scuff resistance. | 12-13-2012 |
20130029787 | MULTI-PIECE SOLID GOLF BALL - A multi-piece solid golf ball has a core, an envelope layer encasing the core, an intermediate layer encasing the envelope layer, and an outer layer which encases the intermediate layer and has formed on a surface thereof a plurality of dimples. The core is made of an elastomer. The envelope layer is formed of an inner envelope layer and an outer envelope layer, and the intermediate layer is formed of an inner intermediate layer and an outer intermediate layer. The outer layer has a hardness which is higher than the average core hardness, and each of the envelope layers and the intermediate layers is softer than the outer layer. | 01-31-2013 |
20140187351 | MULTI-PIECE SOLID GOLF BALL - A multi-piece solid golf ball has a core, at least one intermediate layer and an outer layer. The core is formed of a single layer or of two or more layers. The interior hardness profile of the core is set in a specific range, and the relationship between the compressive deformations of the core and the golf ball under given loadings is set in a specific range. The outer layer is formed primarily of a thermoplastic polyurethane material, and has a material hardness that is set in a specific range. | 07-03-2014 |
20140187353 | MULTI-PIECE SOLID GOLF BALL - A multi-piece solid golf ball has a core, at least one intermediate layer and an outer layer. The core is formed of a single layer or of two or more layers. The interior hardness profile of the core is set in a specific range, and the relationship between the compressive deformations of the core and the golf ball under given loadings is set in a specific range. The outer layer is formed primarily of a thermoplastic polyurethane material, and has a material hardness that is set in a specific range. | 07-03-2014 |
20140256470 | MULTI-PIECE SOLID GOLF BALL - A multi-piece solid golf ball comprising a core, an envelope layer encasing the core, an intermediate layer encasing the envelope layer, and a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples, wherein the core is made primarily of a rubber material and has a diameter of at least 31 mm, the envelope layer and intermediate layer are each made primarily of the same or different resin materials and the cover is made primarily of polyurethane; intermediate layer and cover have an optimized thickness relationship; the core, envelope layer, intermediate layer and cover have optimized hardness relationships; and the core surface and core center have a large hardness difference therebetween. The golf ball has excellent flight performance and controllability acceptable to professionals and other skilled golfers, while also having excellent durability to cracking upon repeated impact and excellent scuff resistance. | 09-11-2014 |