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 |
20120100932 | 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 a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples. The envelope layer is formed of an inner envelope layer, an intermediate envelope layer and an outer envelope layer. The inner, intermediate and outer envelope layers, the intermediate layer and the cover are each formed primarily of a resin material which may be of the same or different types, and the core is formed primarily of a rubber material. The cover has a material hardness which is higher than the core center hardness. One of the inner layers has a material hardness which is higher than either or both of the cover material hardness and the average core hardness (defined as the arithmetic mean of the core surface hardness and the core center hardness). The golf ball lowers the spin rate on full shots with a driver, increasing the distance traveled by the ball, and has a good controllability, maintaining a straight path particularly on full shots. In addition, it has a good feel on impact and an excellent scuff resistance. | 04-26-2012 |
20120100933 | 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 a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples. The envelope layer is formed of an inner envelope layer, an intermediate envelope layer and an outer envelope layer. The inner, intermediate and outer envelope layers, the intermediate layer and the cover are each formed primarily of a resin material which may be of the same or different types, and the core is formed primarily of a rubber material. The cover has a material hardness which is the same as or lower than the core center hardness. One of the inner layers has a material hardness which is higher than either or both of the cover material hardness and the average core hardness (defined as the arithmetic mean of the core surface hardness and the core center hardness). The golf ball, even when used by those golfers among professionals and skilled amateurs who, on striking a ball with a driver, tend to generate shots having a rather low spin rate and a low launch angle, has an excellent flight performance and also excellent controllability in the short game that are acceptable to such users. In addition, it has a good feel on impact and an excellent scuff resistance. | 04-26-2012 |
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 |
20130267347 | MULTI-PIECE SOLID GOLF BALL - The invention provides a multi-piece solid golf ball having a solid core with a spherical first layer, a second layer encasing the first layer and a third layer encasing the second layer, and having also an intermediate layer and a cover which encase the solid core. The first to third layers of the solid core are each respectively formed of a rubber composition. The ball has optimized relationships among the cross-sectional hardness at the center of the first layer obtained by cutting the solid core in half, the surface hardnesses of the first to third layers, and the respective hardnesses of the intermediate layer and the cover. The golf ball has an increased distance on full shots with a driver and an improved controllability in the short game, and on full shots also confers an agreeable feel at impact characterized by a solid sensation that includes a soft touch. | 10-10-2013 |
20140018189 | MULTI-PIECE SOLID GOLF BALL - A multi-piece solid golf ball having a core, an envelope layer, an intermediate layer and a cover. The core is formed primarily of a thermoplastic resin and has a diameter of from 20 to 30 mm, the envelope layer is formed of a rubber composition containing primarily a rubber material and has a thickness of from 3 to 10 mm, the intermediate layer is formed of a resin composition containing primarily an ionomer, and the cover is formed of a resin composition containing primarily a urethane. Both the relationship among the specific gravities of the core, the envelope layer and the intermediate layer, and the relationship among the surface hardnesses of the core, the envelope layer, the intermediate layer and the cover are optimized. | 01-16-2014 |
20140018190 | 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 core is formed primarily of a thermoplastic resin and has a diameter of from 20 to 30 mm, the envelope layer is formed of a rubber composition containing primarily a rubber material and has a thickness of from 3 to 10 mm, the intermediate layer is formed of a resin composition containing primarily an ionomer, and the cover is formed of a resin composition containing primarily a urethane. Both the relationship among the specific gravities of the core, the envelope layer and the intermediate layer, and the relationship among the surface hardnesses of the core, the envelope layer, the intermediate layer and the cover are optimized. | 01-16-2014 |
20140018191 | 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 core is formed primarily of a thermoplastic elastomer, the envelope layer is formed of a rubber composition containing primarily a rubber material, the intermediate layer is formed of a resin composition containing primarily an ionomer, and the cover is formed of a resin composition containing primarily a urethane. The relationships among the specific gravities and the surface hardnesses of the respective layers are optimized. This golf ball enables an increased distance on full shots with a driver and improved controllability in the short game to be achieved, and also makes it possible to obtain a further reduction in the spin rate on full shots. | 01-16-2014 |
20140171221 | MULTI-PIECE SOLID GOLF BALL - In a multi-piece solid golf ball having a core, at least one intermediate layer encasing the core and a cover of at least one layer encasing the intermediate layer, each intermediate layer is formed primarily of a resin material and each layer of the cover is formed primarily of an ionomer resin. The intermediate layer has a Shore D material hardness of not more than 50 and the cover has a Shore D material hardness greater than 60, the material hardness of the cover being higher than the material hardness of the intermediate layer. The intermediate layer and the cover have a total thickness of not more than 2.2 mm. The cover has a larger thickness than the intermediate layer, the ratio (a)/(b) of the cover thickness (a) to the intermediate layer thickness (b) being at least 1.1 and not more than 2.0. | 06-19-2014 |
20140171222 | MULTI-PIECE SOLID GOLF BALL - In a multi-piece solid golf ball having a core, at least one intermediate layer encasing the core and a cover of at least one layer encasing the intermediate layer, each intermediate layer is formed primarily of a resin material and each layer of the cover is formed primarily of an ionomer resin. The cover has a Shore D material hardness of not more than 58, and the material hardness of the cover is higher than the material hardness of the intermediate layer. The intermediate layer and the cover have a combined thickness of not more than 2.1 mm. The cover has a smaller thickness than the intermediate layer, the ratio (a)/(b) of the cover thickness (a) to the intermediate layer thickness (b) being at least 0.5 and less than 1.0. | 06-19-2014 |
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 |
20140274472 | 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 a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples. The envelope layer is formed of an inner envelope layer, an intermediate envelope layer and an outer envelope layer. The inner, intermediate and outer envelope layers, the intermediate layer and the cover are each formed primarily of a resin material which may be of the same or different types, and the core is formed primarily of a rubber material. The golf ball has an excellent flight performance and also excellent controllability in the short game. In addition, it has a good feel on impact and an excellent scuff resistance. | 09-18-2014 |