Abstract: A golf club head comprises a club face provided with a high-strength part whose tensile strength is in the range of from 950 to 2200 MPa, wherein the high-strength part has Young's modulus in the range of from 120 to 160 GPa.

Abstract: A golf putter head includes: a head body having a face surface; and a different member fixed to the head body and having a plurality of end portions as fixed portions to the head body, and a spaced extension extended between the end portions and spaced away from the head body, the different member fixed to the head body as elastically deformed by being fixed to the head body in a manner that the end portions thereof have a relative positional relation varied from that when the different member is in an independent piece state.

Abstract: A golf club head including a head base body which surface is formed with a coating film, the coating film including a topcoat layer consisting of an acrylic resin coating material containing polyethylene wax of 1.0 to 10.0 parts by weight with respect to acrylic resin solid content of 100 parts by weight. It is possible to improve abrasion resistance while making the best use of excellent impact resistance of the acrylic resin coating material, and thus, to effectively prevent peeling of the coating film. Further, it is possible to enhance the interlayer adhesion of inner layers with the topcoat layer.

Abstract: A golf club includes a shaft and a head. The golf club has a shaft mass Ms of 60 g or less and defines a head mass Mh(g) and the shaft mass Ms(g) to have a relation to satisfy the following expressions (A) and (B): Mh?Ms+155??(A) Mh??0.14·Ms+240.

Abstract: A method of manufacturing a golf club head comprises: making a billet of a titanium alloy Ti-6Al-4V by machining an ingot of the titanium alloy; forging the billet into a face plate within a temperature range of from (the beta transformation temperature ?150 degrees C.) to (the beta transformation temperature ?20 degrees C.); and jointing the face plate and a head main body, whereby the golf club head comprise a face portion for hitting a ball, at least part of which is made of an alpha and beta type titanium alloy Ti-6Al-4V including alpha phase crystal structure whose average grain size is not less than 20 micrometers but less than 70 micrometers.

Abstract: In a golf putter including a putter head including a head body formed from a metal, and a face insert formed from an elastic material and fixed in a putter face of the head body, the face insert includes a varied thickness portion increased in thickness from a zone adjacent a sweet spot of the head toward circumferential edges of the face insert.

Abstract: A wood-type golf club head containing a volume which is not less than 300 cc, including a main body and a face member disposed on the front of the main body to form a clubface. The face member is formed by (i) forging an alpha-beta-type titanium alloy at a temperature which is less than the transformation temperature to the beta phase of the alloy, and of which difference from the transformation temperature to the beta phase is not more than 100 deg.C., and (ii) subsequent cooling within a temperature range of from 0 to 100 deg.C. The face member is welded to the main body to form a junction therebetween, wherein the junction is partially or wholly shifted backwards from the edge of the clubface by at least 5 mm, and the total length of the edge of the clubface where the shift is at least 5 mm, is not less than 40% of the whole length of the edge.

Abstract: The object of the present invention is to provide a golf ball having the individualized appearance as well as the visibility, which the mark should inherently provide, by imparting the luster to the mark, without lowering the durability of the mark. The golf ball of the present invention comprises a mark on the surface of the golf ball body, and a clear coating layer covering the mark, the mark having a color tone satisfying L≦40 specified by Lab color system, wherein the clear coating layer includes the base resin; and the luster material comprising a glass flake and a metal oxide layer coated on the surface of the glass flake.

Abstract: A method of manufacturing a golf club head comprises: hot forging a material of a beta titanium alloy into the face plate, slow cooling the forged face plate; and assembling a golf club head from the face plate and other component(s).

Abstract: A golf grip is formed by the crosslinking of a rubber composition obtained through the kneading of a base rubber and a rubber-polyolefin-nylon ternary copolymer. This ternary copolymer is obtained by the graft polymerization of a rubber component, a polyolefin component and a nylon component. This ternary copolymer is a fine fiber reinforced composite having fine nylon fibers dispersed in a matrix composed of the rubber component and the polyolefin component. The amount of the rubber-polyolefin-nylon ternary copolymer to be blended is from 1 part by weight to 50 parts by weight on the basis of 100 parts by weight of the base rubber.

Abstract: A golf club head comprises a ball striking face provided with a central region having a surface hardness Hc and a peripheral region surrounding the central region and having a surface hardness Hp less than the surface hardness Hc.

Abstract: A golf club head comprising a head substrate having a coating film formed on a surface thereof. The coating film contains a shiny layer made of a shiny coating material containing metal oxide-coated glass pieces, with the content of the glass pieces in the shiny coating material being in a range of 0.01 wt % to 1.0 wt % relative to the solid component of the shiny coating material. Furthermore, the coating film has a total thickness of not more than 100 &mgr;m.

Abstract: A method of manufacturing a golf club head comprises: making a billet of a titanium alloy Ti-6Al-4V by machining an ingot of the titanium alloy; forging the billet into a face plate within a temperature range of from (the beta transformation temperature −150 degrees C.) to (the beta transformation temperature −20 degrees C.); and jointing the face plate and a head main body, whereby the golf club head comprise a face portion for hitting a ball, at least part of which is made of an alpha and beta type titanium alloy Ti-6Al-4V including alpha phase crystal structure whose average grain size is not less than 20 micrometers but less than 70 micrometers.

Abstract: The object of the present invention is to provide a golf ball having the individualized appearance as well as the visibility, which the mark should inherently provide, by imparting the luster to the mark, without lowering the durability of the mark.

Abstract: A golf club head comprises a face portion formed by: forging a beta type titanium alloy while keeping the temperature of the alloy lower than the lower critical solution temperature of the alloy; and aging the forged alloy under the lower critical solution temperature Tc so as not to become a solution state. A method of manufacturing a golf club head comprises: preparing a billet of a beta type titanium alloy; forging the billet into the face member while keeping the temperature of the billet lower than the lower critical solution temperature Tc of the beta type titanium alloy; and aging the face member under the lower critical solution temperature Tc so as not to become a solution state.

Abstract: A tubular member (10) including a laminate of a plurality of prepregs each containing a matrix resin and a reinforcing fiber impregnated with the matrix resin. A polarizing prepreg (15) whose reinforcing fiber consists of a glass fiber and whose matrix resin contains a polarizing material is disposed at least at an outermost layer of the laminate. The polarizing prepreg (15) and the prepregs (11 to 14) other than the polarizing prepreg (15) are formed integrally to obtain the tubular member (10). The polarizing prepreg (15) is disposed in such away as to cover the surface of the laminate entirely or partly.

Abstract: A golf club head comprises a main body and a coating film covering a metallic surface of the main body, wherein the coating film comprises a clear foundation layer formed on the metallic surface and containing acid-modified polyolefin based resin as its base resin, and a colored clear second layer formed outside the foundation layer so that said metallic surface is visible through the coating film.

Abstract: A method of manufacturing golf club heads comprises a process of coating golf club heads with a paint by passing the golf club heads through a space in which the paint is sprayed by an electrostatic spray coating machine so that the charged spray of the paint is attracted to the rotating golf club heads.

Abstract: A grip 1 is formed by crosslinking of a rubber composition. The rubber composition is obtained through kneading a base rubber and a rubber-polyolefin-nylon ternary copolymer. This ternary copolymer is obtained by graft polymerization of a rubber component, a polyolefin component and a nylon component. This ternary copolymer is a fine fiber reinforced composite having fine nylon fibers dispersed in a matrix composed of a rubber component and a polyolefin component. Amount of the rubber-polyolefin-nylon ternary copolymer to be blended is from 1 part by weight to 50 parts by weight on the basis of 100 parts by weight of the base rubber.

Abstract: A golf club head which comprises a face portion defining a face for hitting a golf ball, and a side portion between a crown portion and a sole portion, extending from a toe-side edge of the face portion to a heel-side edge of the face portion through the back face of the head, wherein the face portion is composed of a face plate and a face side part on one of or each of the toe side and heel side of the face plate, and the face side part is formed integrally with the side portion, but the face plate is formed separately from the face side part and welded to the face side part. The ratio of the area of the face side part to the area of the face plate is preferably set in a range of from 0.05 to 0.2.