Golf club head

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.

1 . A golf club head comprising:
 a head body having a front opening;   a single-piece striking plate member covering said front opening and having a striking face with a striking zone, and a back face opposite to said striking face, said back face having an annular reinforcing rib formed thereon behind said striking zone and corresponding in position to said striking zone, a central boss formed concentrically within said annular reinforcing rib, and a plurality of angularly spaced-apart diametral reinforcing ribs extending diametrically through said central boss and said annular reinforcing rib, said annular reinforcing rib and said diametral reinforcing ribs cooperating to define a plurality of receiving grooves; and   a plurality of vibration-absorbing elements disposed respectively in said receiving grooves.   
     
     
         2 . The golf club head of  claim 1 , wherein said diametral reinforcing ribs include a substantially vertical reinforcing rib, and a substantially horizontal reinforcing rib that intersects perpendicularly said vertical reinforcing rib. 
     
     
         3 . The golf club head of  claim 2 , wherein said diametral reinforcing ribs further include a plurality of angularly spaced-apart oblique reinforcing ribs intersecting said vertical reinforcing rib obliquely. 
     
     
         4 . The golf club head of  claim 3 , wherein said back face has an outer peripheral flange that projects rearwardly from said back face along an outer periphery of said back face, each of said diametral reinforcing ribs having two opposite ends connected to said outer peripheral flange. 
     
     
         5 . The golf club head of  claim 2 , wherein said striking plate member further has a ring projecting rearwardly from said back face and extending concentrically around said annular reinforcing rib, said back face further having a plurality of angularly spaced-apart radial reinforcing ribs that extend from said annular reinforcing rib toward said ring.