Patent application number | Description | Published |
20080254910 | Golf club head - A golf club head comprises a face portion whose front face forms a clubface having a clubface roll of a radius R, and the clubface is provided with a plurality of parallel grooves extending straight at an angle of not more than 10 degrees with respect to the toe-and-heel direction of the head so as to form at least one lateral zone between the parallel grooves, wherein the above-mentioned at least one lateral zone is provided with a convex curve of a radius (r) smaller than the radius R of the clubface roll. | 10-16-2008 |
20090017938 | Wood-type golf club head - A wood-type golf club head has a club face provided with a face roll, and the radius of curvature Y in inch of the face roll satisfies: Ma/Y=<250 and Ma>=3000, wherein Ma is a vertical moment of inertia in g sq·cm of the head around a horizontal axis extending through the center of gravity of the head in parallel with a toe-heel direction of the head. | 01-15-2009 |
20090091058 | GOLF BALL - The present invention provides a golf ball having excellent rebound characteristics and excellent flight performance, while maintaining good durability and good appearance. The present invention relates to a golf ball comprising a core composed of a center and at least one intermediate layer formed on the center, and a cover covering the. core, and having many dimples on the surface thereof, wherein the outermost layer of the intermediate layer is formed from thermoplastic resin, has a thickness of 0.5 to 3.0 mm, and has depressions on the surface thereof at the position and shape corresponding to the dimples through the cover, and the cover is formed from thermoplastic resin and has a thickness of 0.1 to 0.8 mm in land portion having no dimple. | 04-09-2009 |
20090091060 | GOLF BALL - The present invention provides a golf ball having excellent rebound characteristics and flight performance, while maintaining good durability and appearance. The present invention relates to a golf ball comprising a center, an intermediate layer and a cover, the intermediate layer comprises an outermost layer and a second layer adjacent to the underside of the outermost layer, and the cover has many dimples on the surface thereof, wherein the second layer is formed from thermoplastic resin and has a thickness of 0.5 to 2.0 mm, the outermost layer is formed from thermosetting or thermoplastic resin and has a thickness of 1 to 100 μm, the intermediate layer has depressions on the surface thereof at the position and shape corresponding to the dimples through the cover, and the cover is formed from thermoplastic resin and has a thickness of 0.1 to 0.8 mm in land portion having no dimple. | 04-09-2009 |
20090118034 | Golf club head | 05-07-2009 |
20090286622 | GOLF CLUB HEAD AND METHOD FOR MANUFACTURING THE SAME - A golf club head has a hollow structure comprising a main body member and a face member. The face member is made of an unidirectionally rolled plate of a titanium alloy having alpha phase crystals. The rolled direction of the unidirectionally rolled plate is inclined at an angle θ | 11-19-2009 |
20100022328 | WOOD-TYPE GOLF CLUB HEAD - A hollow wood-type golf club head 1 capable of controlling the spring effect without excessively increasing the weight of a face portion, the club head | 01-28-2010 |
20100137076 | GOLF BALL | 06-03-2010 |
20100304884 | GOLF CLUB HEAD | 12-02-2010 |
20110021289 | GOLF CLUB HEAD - When a length of a cross section CS | 01-27-2011 |
20130203523 | GOLF BALL | 08-08-2013 |
20130307182 | METHOD FOR MANUFACTURING A GOLF BALL - An object of the present invention is to provide a method for manufacturing a golf ball excellent in kneading workability when preparing a core rubber composition containing (d) a carboxylic acid and/or a salt thereof. The present invention provides a method for manufacturing a golf ball comprising the steps of blending (a) a base rubber and at least (b) a carboxylic acid and/or a salt thereof to prepare a first masterbatch; blending (a) a base rubber and at least (c) a crosslinking initiator to prepare a second masterbatch; blending the first masterbatch and second masterbatch to form a core rubber composition; molding the core rubber composition into a spherical core; and forming one or more cover layers covering the spherical core. | 11-21-2013 |
20130320587 | METHOD FOR MANUFACTURING GOLF BALL - An object of the present invention is to provide a novel method of manufacturing a golf ball comprising forming a spherical core having less-variable compression deformation amount and stabilized properties. The present invention provides a method for manufacturing a golf ball, comprising the steps of: blending (a) a base rubber, (b) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, (d) a carboxylic acid and/or a salt thereof having a number-average particle size ranging from 15 μm to 60 μm, and (e) where necessary a metal compound to prepare a core rubber composition; molding the core rubber composition into a spherical core under specific conditions; and forming at least one cover layer on the spherical core. | 12-05-2013 |
20130324312 | GOLF BALL AND METHOD FOR MANUFACTURING THE SAME - An object of the present invention is to provide a golf ball comprising a core formed from a rubber composition containing (d) a carboxylic acid and/or a salt thereof and traveling a great flight distance on driver shots. The present invention provides a golf ball comprising a spherical core and at least one cover layer covering the spherical core, wherein the spherical core is formed from a rubber composition containing (a) a base rubber, (b) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, (d) a carboxylic acid and/or a salt thereof and two or more kinds of (e) organic sulfur compounds, provided that the rubber composition further contains (f) a metal compound in case of containing only (b) the α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms as the co-crosslinking agent. | 12-05-2013 |