Weight-adjustable golf club head provided with rear lightweight covering

Abstract

A weight-adjustable golf club head includes a rear lightweight covering and a golf club head body combined therewith. The rear lightweight covering has a rear crown portion and a rear wall portion extended therefrom. The golf club head body is combined with the rear lightweight covering which is designed to have a striking face, a front crown portion and a sole portion. The rear lightweight covering is made from a low specific gravity metal, and is designed to have a thickness less than 0.6 mm. The rear lightweight covering has an inner surface formed with a plurality of reinforcing ribs.

1 . A weight-adjustable golf club head, comprising:
 a golf club head body;   a rear lightweight covering having a rear crown portion and a rear wall portion to combine with the golf club head body, the rear lightweight covering having a thickness less than 0.6 mm; and   a plurality of reinforcing ribs formed on an inner surface of the rear lightweight covering, the reinforcing ribs extending along a front-to-rear direction of the golf club head body;   wherein the reinforcing ribs reinforce the rear lightweight covering which provides a high degree of elastic deformability in impacting a golf ball.   
   
   
       2 . The weight-adjustable golf club head as defined in  claim 1 , wherein the rear lightweight covering is selected from one of a titanium-alloy covering, a Fe-Mn-Al alloy covering, an aluminum alloy covering and a manganese alloy covering. 
   
   
       3 . The weight-adjustable golf club head as defined in  claim 1 , wherein the rear lightweight covering is integrally formed with the rear crown portion and the rear wall portion. 
   
   
       4 . The weight-adjustable golf club head as defined in  claim 1 , wherein the golf club head body is integrally formed with a striking face, a front crown portion and a sole portion. 
   
   
       5 . The weight-adjustable golf club head as defined in  claim 1 , wherein the reinforcing ribs are formed on an inner surface of the rear crown portion of the rear lightweight covering. 
   
   
       6 . The weight-adjustable golf club head as defined in  claim 5 , wherein the reinforcing ribs are parallel each other while extending along the front-to-rear direction of the golf club head body. 
   
   
       7 . The weight-adjustable golf club head as defined in  claim 1 , wherein the rear lightweight covering has a first connecting periphery while the golf club head body has a second connecting periphery. 
   
   
       8 . The weight-adjustable golf club head as defined in  claim 7 , wherein the first connecting periphery has a crown-connecting periphery and a wall-connecting periphery while the second connecting periphery has a crown-connecting periphery and a sole-connecting periphery. 
   
   
       9 . The weight-adjustable golf club head as defined in  claim 8 , wherein the crown-connecting periphery of the first connecting periphery has a crown-assembling edge to connect with that of the second connecting periphery. 
   
   
       10 . The weight-adjustable golf club head as defined in  claim 8 , wherein the wall-connecting periphery of the first connecting periphery has wall-assembling edges to connect with those of the second connecting periphery. 
   
   
       11 . The weight-adjustable golf club head as defined in  claim 8 , wherein the wall-connecting periphery of the first connecting periphery has a bottom-assembling edge to connect with a sole-assembling edge of the second connecting periphery. 
   
   
       12 . The weight-adjustable golf club head as defined in  claim 1 , wherein the rear lightweight covering has a specific gravity lower than that of the golf club head body. 
   
   
       13 . The weight-adjustable golf club head as defined in  claim 1 , wherein the reinforcing rib adjacent to a center portion of the rear crown portion of the rear lightweight covering has a greater length.