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Striking plate for a golf club headStriking plate for a golf club head description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080039231, Striking plate for a golf club head. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001]1. Field of the Invention [0002]The invention relates to a striking plate for a golf club head, more particularly to a striking plate for a golf club head having improved striking stability and controllability. [0003]2. Description of the Related Art [0004]Referring to Figures land 2, a conventional striking plate 11 of a golf club head 1 is made integrally of a single metal material, such as titanium, magnesium, aluminum, or the like. Therefore, the conventional striking plate 11 has a crystalline phase with a uniform crystallographic orientation. When the conventional striking plate 11 is stricken by a golf ball, the striking stress imparted on a sweet spot region (A) of the conventional striking plate 11 will be transmitted directly to a peripheral edge of the striking plate 11, and is then transmitted to a head body 12 of the golf club head 1. The term "sweet spot region" as used herein is a substantially center region of a striking plate of a golf club head which is an ideal striking region to impose a relatively large reactive force onto the stricken golf ball so that the stricken golf ball can travel a relatively far distance. [0005]In view of the aforesaid, when the conventional striking plate 11 is stricken by the golf ball, the striking stress on the sweet spot region can not reside in this region for a desirably long period. Therefore, a reactive force feedback to the stricken golf ball may not be sufficient, and the striking effect of the conventional striking plate 11 is not satisfactory. Additionally, the striking stability and the direction controllability of the striking plate 11 are also limited thereby. SUMMARY OF THE INVENTION [0006]Therefore, the object of the present invention is to provide a striking plate for a golf club head which is improved in terms of striking stability, direction controllability, and structural strength. [0007]Accordingly, a striking plate of a golf club head of this invention 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. BRIEF DESCRIPTION OF THE DRAWINGS [0008]Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which: [0009]FIG. 1 is a perspective view of a conventional striking plate used in a golf club head; [0010]FIG. 2 is a sectional view of the conventional striking plate; [0011]FIG. 3 is a perspective view of a first preferred embodiment of a striking plate according to this invention, which is used in a golf club head; [0012]FIG. 4 is a sectional view of the first preferred embodiment; [0013]FIG. 5 is a sectional view of a second preferred embodiment of a striking plate according to this invention; [0014]FIG. 6 is a sectional view of a third preferred embodiment of a striking plate according to this invention; [0015]FIG. 7 is a sectional view of a fourth preferred embodiment of a striking plate according to this invention; and [0016]FIG. 8 is a sectional view of a fifth preferred embodiment of a striking plate according to this invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0017]Before the present invention is described in greater detail, it should be noted that like elements are denoted by the same reference numerals throughout the disclosure. [0018]Referring to FIGS. 3 and 4, the first preferred embodiment of a striking plate 31 according to this invention is shown to be mounted on a hollow head body 32 so as to make a golf club head 3. The striking plate 31 includes a sweet spot region 311 made of a first metal piece, and a non-sweet spot region 312 surrounding the sweet spot region 311 and defining an opening 310 that receives the first metal piece. The sweet spot region 311 has a striking surface flush with that of the non-sweet spot region 312. The non-sweet spot region 312 is made of a second metal piece. According to the present invention, the first and second metal pieces are arranged such that crystalline phases thereof have different crystallographic orientations. [0019]To provide different crystallographic orientations, the first and second metal pieces can be made of different metals. In an example, the first metal piece is made of a metal, such as stainless steel or alloy steel, having a mechanical strength higher than that of a metal, such as titanium, for the second metal piece. Examples of the metal suitable for each of the first and second metal pieces include stainless steel, alloy steel, molybdenum, vanadium, zirconium, titanium, aluminum, magnesium, and the like. The first metal piece is glued to the second metal piece. Alternatively, the first and second metal pieces can be bonded together by other suitable methods, such as welding, press fitting, interlocking, etc. [0020]Different crystallographic orientations may also be provided by forming the first and second metal pieces at different forming conditions and by heat treating the first and second metal pieces at different heat treatment conditions. In addition, the first and second metal pieces may also be provided from the same metal plate by shearing the metal plate using a punch so that the metal plate is divided into a surrounding part having a hole and a middle part within the hole. When the middle part is rotated relative to the surrounding part, the crystallographic orientation of the middle part is different from that of the surrounding part. Continue reading about Striking plate for a golf club head... Full patent description for Striking plate for a golf club head Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Striking plate for a golf club head patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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