Abstract: A golf club head includes a hollow head body, a striking plate, and a shock absorber. The hollow head body has a front opening. The striking plate covers the front opening, and has a front face, a rear face, and a sweet spot. The shock absorber is connected to the rear face of the striking plate, corresponds in position to the sweet spot, and has a size smaller than that of the front opening and substantially equal to an area of the sweet spot.

Abstract: A golf club head includes a shell, a covering plate, and a male-and-female engagement unit. The shell includes an inner surface, an outer surface, an assembling hole extending through the inner and outer surfaces, a bounding edge bounding the assembling hole, and a flange projecting inwardly from the inner surface and the bounding edge and extending toward the assembling hole. The flange has a shoulder face that has a depth from the outer surface and that is adjacent to the bounding edge. The shoulder face extends in full length of the bounding edge. The covering plate is inserted into the assembling hole and contacts the shoulder face. The male-and-female engagement unit is provided on and interengages the covering plate and the flange.

Abstract: A method for forming a pattern on a golf club head includes the steps of forming at least one primer layer on the golf club head, and engraving the primer layer using a laser beam to form the pattern on the primer layer. The primer layer has a dark color, and a light-transmissive protecting layer is optionally applied on the primer layer after engraving.

Abstract: A golf club head includes a head body, at least one arcuate rail, and at least one counterweight unit. The head body includes a front striking face, and a rear arcuate face that extends rearwardly from two opposite sides of the front striking face and that has top and bottom ends. The arcuate rail projects from an outer surface of the rear arcuate face proximate to the bottom end. The counterweight unit is positioned adjustably on the arcuate rail.

Abstract: A titanium alloy for making a gold club head includes aluminum in an amount ranging from 7.8 to 10.0 wt %, molybdenum in an amount of greater than 0 wt % and not more than 2 wt %, vanadium in an amount of greater than 0 wt % and not more than 2 wt %, silicon in an amount of greater than 0 wt % and not more than 2 wt %, and a balance of titanium, based on a total weight of the alloy.

Abstract: A golf club head includes a head body having a front opening, a striking plate member covering the front opening, and at least one vibration-absorbing element. The striking plate member includes a striking face with a striking zone, and a back face opposite to the striking face and having a receiving groove. The vibration-absorbing element is disposed in the receiving groove.

Abstract: A golf club head includes a head body having a front opening, a striking plate member, and a vibration-absorbing plate member. The striking plate member covers the front opening, and has a front striking face with a striking zone, and a ring projecting rearwardly from a rear side of the striking plate member and defining an indentation. The vibration-absorbing plate member is fixed in the indentation.

Abstract: A golf club head includes a hollow head body having a front striking member, an upper shell portion extending rearwardly from the front striking member, and a lower shell portion extending rearwardly from the front striking member and connected to the upper shell portion. One of the upper and lower shell portions is made of plastic, and the other one of the upper and lower shell portions is made of metal. The plastic shell portion has an inner surface, and reinforcing ribs projecting from the inner surface. The front striking member has a rear inner surface free of the reinforcing ribs projecting therefrom. By virtue of the reinforcing ribs on the plastic shell portion, the distance of the center of gravity of the hollow head body from the front striking member can be increased.

Abstract: A striking plate of a golf club head includes a plate body, a plurality of parallel elongate grooves formed in a surface of the plate body and each having a groove bottom, and a plurality of protrusions projecting from the groove bottom of each of the grooves and spaced apart from each other along the groove bottom.

Abstract: A striking plate for a golf club head includes a sweet spot region made of a first metal piece, and a non-sweet spot region surrounding the sweet spot region and defining an opening that receives the first metal piece. The sweet spot region has a striking surface flush with that of the non-sweet spot region. The non-sweet spot region is made of a second metal piece. The first and second metal pieces have crystalline phases with different crystallographic orientations.

Abstract: A method for making a golf club head includes the steps: of preparing a first golf club head component having a first bonding edge defining an opening, and a second golf club head component made of a material different from that of the first golf club head component and having a second bonding edge; placing the second golf club head component in the opening of the first golf club head component with the first bonding edge surrounding the second bonding edge; placing a solder between the first and second bonding edges; placing the first and second golf club head components and the solder in a chamber filled with an inert gas; and welding the first bonding edge to the second bonding edge by heating the solder using a laser beam.

Abstract: A method of hardening a surface of a golf club head includes the steps of positioning a golf club head in a chamber filled with a protecting gas, and irradiating a predetermined metallic surface area of the golf club head with a light beam from a light generator so as to heat-treat and harden the predetermined area of the golf club head.

Abstract: A golf club head includes a head body and a striking plate member. The head body has a front opening, and an inner periphery defining the front opening. The striking plate member covers the front opening, and includes a front plate, and a back plate opposite to the front plate. One of the front and back plates is made of a carbon fiber plastic material. The other one of the front and back plates is made of a titanium alloy.

Abstract: A golf club head includes a head body having a front opening, a striking plate member, and a vibration-absorbing plate member. The striking plate member covers the front opening, and has a front striking face with a striking zone, and a ring projecting rearwardly from a rear side of the striking plate member and defining an indentation. The vibration-absorbing plate member is fixed in the indentation.

Abstract: A golf club head includes a head body having a front opening, a striking plate member covering the front opening, and at least one vibration-absorbing element. The striking plate member includes a striking face with a striking zone, and a back face opposite to the striking face and having a receiving groove. The vibration-absorbing element is disposed in the receiving groove.

Abstract: A golf club head includes a head body having a front opening, and a single-piece striking plate member covering the front opening and having a striking face with a striking zone, and a back face formed with an annular reinforcing rib behind the striking zone and corresponding in position to the striking zone, a central boss formed concentrically within the annular reinforcing rib, and a plurality of angularly spaced-apart diametral reinforcing ribs extending diametrically through the central boss and the annular reinforcing rib. The annular reinforcing rib and the diametral reinforcing ribs cooperate to define a plurality of receiving grooves. A plurality of vibration-absorbing elements are disposed respectively in the receiving grooves.

Abstract: A method for engraving a golf club head includes the steps of: a) applying a shielding layer on a surface of the golf club head; b) forming a predetermined patterning hole in the shielding layer by removing a part of the shielding layer; c) spraying an etching agent on the shielding layer so as to etch the surface of the golf club head through the predetermined patterning hole in order to form a patterning indentation in the surface; and d) removing the shielding layer from the golf club head.

Abstract: A golf club head includes a head body, at least one arcuate rail, and at least one counterweight unit. The head body includes a front striking face, and a rear arcuate face that extends rearwardly from two opposite sides of the front striking face and that has top and bottom ends. The arcuate rail projects from an outer surface of the rear arcuate face proximate to the bottom end. The counterweight unit is positioned adjustably on the arcuate rail.

Abstract: A wax pattern for use in making a golf club head has a shell wall which defines a hollow region and which includes a front portion, a rear displacement portion and a dividing line extending between the front and rear displacement portions. The wax pattern has a profile conforming to that of the golf club head. A metal blank having the same shape and size as the wax pattern is made by using the wax pattern. The blank is then cut along a dividing line to remove a rear displacement portion thereof so as to form a metal part for making the golf club head.

Abstract: A golf club head includes a head member having a front striking surface, a rear side, a top side, and a bottom side; a counterweight provided in at least one of the rear side and the bottom side; and a shock-absorbing member provided between the counterweight and the at least one of the rear side and the bottom side.