Patent Publication Number: US-2005143189-A1

Title: Golf club head

Description:
FIELD OF THE INVENTION  
      The present invention relates to an improved golf club head and particularly to a golf club head that has a reduced weight on the upper side, forms a higher trajectory track for the hitting golf ball, is easier to strike, looks more appealing and provides more versatile appearances, and generates a crispy sound when the golf ball is hit.  
     BACKGROUND OF THE INVENTION  
      With increasingly rising of people&#39;s living standard, golf population also grows continuously. Playing golf has to use various types and numbers of golf club heads. The golf ball trajectory track is a big concern for golfers. Many golf club heads are made in an integrated manner. Such types of heads often are heavier and move the gravity center forwards and make swinging of golf club more difficult. These days some golf club heads are made with a hitting panel of a smaller weight. But these types of heads have difficulty to lower the gravity center. As a result, striking stability is difficult to improve. To meet the requirement of making the gravity center of the golf club head lower and backward, a balance weight has to be added on the bottom plate. Such an approach makes the head heavier and swinging of the golf club more difficult. In the golf game, a good golf club and club head is important and they could determine win or loss. It has to match the swinging posture and habit of the user and to be adjusted to get the optimum gravity center location so that swinging of the golf club is smooth and hitting the sweet spot is easier. Due to every person has a different swinging posture and habit, at present the gravity center of the club head is mostly located in the center. Hence a small deviation of swinging could result in loss of the standard hitting point and miss the sweet spot. To match different swinging postures and habits, reducing the weight of the club head is necessary. It is usually accomplished by adding a balance weight on the hitting side to adjust the gravity center. Such a structure is difficult to fabricate. Once the location of the gravity center is set, it cannot be changed. To change the location of the gravity center, users have to buy a new club head. It is costly and not very practical. In short, the present club heads generally are difficult to reduce the weight and results difficulty in swinging of the golf club. The appearance of the club head is plain and not versatile. It also cannot generate a crisp sound when the golf ball is hit.  
     SUMMARY OF THE INVENTION  
      In view of the aforesaid disadvantages, the present invention aims to provide an improved golf club head.  
      The primary object of the invention is to reduce the weight of upper side of the club head and generate a crisp sound when the golf ball is hit. It mainly has a balance weight disposed in a matching recess formed on an upper side of the club head. An upper lid made from a composite material or fibers with a curvature matching of the upper side of the club head is bonded thereon in an integrated manner to anchor the balance weight.  
      The club head according to the invention includes a body, a balance weight and an upper lid. The body is integrally made from titanium by forging. It has a hitting surface on the front side and a recess formed on the upper side of a rear end thereof. The balance weight is located in the recess and covered by the upper lid.  
      The balance weight mates the recess and has apertures formed thereon to reduce the weight of the club head (or may be added to the weight of other areas to adjust the gravity center location).  
      The upper lid is made from a composite material or fibers with a curvature matching the upper side of the club head.  
      The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is an exploded view of the present invention.  
       FIG. 2A  is a perspective view of the present invention  
       FIG. 2B  is a cross section taken on line A-A in  FIG. 2A .  
       FIG. 3  is a perspective view of a second embodiment of the present invention.  
       FIG. 4  is a perspective view of a third embodiment of the present invention.  
       FIG. 5  is a perspective view of a fourth embodiment of the present invention.  
       FIG. 6  is a perspective view of a fifth embodiment of the present invention.  
       FIG. 7  is a perspective view of a sixth embodiment of the present invention.  
       FIG. 8  is a perspective view of a seventh embodiment of the present invention.  
       FIG. 9  is a perspective view of a eighth embodiment of the present invention.  
       FIG. 10  is a perspective view of a ninth embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
      Please refer to  FIG. 1 , the golf club head according to the invention includes: 
          a body  1  made from titanium by forging in an integrated manner. It has a neck  10  on a lateral side with an insert hole  100  to couple with a shaft  4 . The body  1  has a hitting face  11  on the front side and a recess  13  formed on an upper side  12  at the rear end. The recess  13  holds a balance weight  2  which is  2   b  and  2   c  have respectively apertures  20   b  of the same size or apertures  21   c  of different sizes formed thereon.        

      Refer to  FIGS. 6 and 7  for yet another two embodiments of the present invention. It is constructed substantially like the embodiment shown in  FIG. 1 . However, the balance weights  2   d  and  2   e  have respectively elongated troughs  20   d  and arched troughs  20   e  formed thereon.  
      Refer to  FIGS. 8 and 9  for still another two embodiments of the present invention. It is constructed substantially like the embodiment shown in  FIG. 1 . However, the balance weights  2   f  and  2   g  have respectively upper arched troughs  20   f  and lower arched troughs  20   g  formed thereon.  
      Refer to  FIG. 10  for another embodiment of the present invention. It is constructed substantially like the embodiment shown in  FIG. 1 . However, the balance weight  2   h  has transverse troughs  20   h  formed thereon.  
      By means of the constructions set forth above, the invention can provide the following advantages: 
          1. A balance weight with apertures or grooves of different shapes may be mounted on the upper side of the club head, and covered by an upper lid to reduce the weight of the upper side of the club head. It can be adapted to different swinging postures and habits of golfers. And it can generate a crisp sound when hitting gold ball.     2. The invention has a wide range of applicability and can a plate of an uniform thickness. The balance weight  2  has a shape mating the recess  13  and has apertures  20  formed thereon. There is an upper lid  3  covering the balance weight  2  from above. The upper lid  3  is made from a composite material or fibers. The upper lid  3  has an upper surface  30  which forms a curvature matching the upper side  12  of the body  1  and has a shape mating the recess  13 . The upper lid  2  is located above the balance weight  2  and compressed to become integrated therewith.        

      For assembly (referring to  FIG. 2A ), the balance weight  2  is placed in the recess  13  on the upper side  12  of the body  1 . Then dispose the upper lid  3  thereon to anchor the balance weight  2  on the upper side  12  of the body  1  (as shown in  FIG. 2B ). Thus the weight at the upper side of the body  1  is reduced. And the location of the gravity center may be adjusted. As the upper lid  3  is made from a composite material or fibers, it makes the club head more appealing and versatile. It also can generate a crispy sound when hitting golf ball.  
      Refer to  FIG. 3  for a second embodiment of the present invention. It is constructed substantially like the embodiment shown in  FIG. 1 . The difference is that the balance weight  2   a  has a flat surface.  
      Refer to  FIGS. 4 and 5  for another two embodiments of the present invention. It is constructed substantially like the embodiment shown in  FIG. 1 . However, the balance weights uniform fabrication of the club head. By forming apertures and grooves of different shapes on the balance weight, desired results may be achieved. Manufacturing time and cost may also be reduced.