Patent Publication Number: US-8986132-B2

Title: Golf club head having air flow guiding slot with uneven surface

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a golf club head, and more particularly to a golf club head having air flow guiding slot with uneven surface. 
     2. Description of the Related Art 
     Referring to  FIG. 1 , it shows the conventional golf club head. Please refer to U.S. Pat. No. 6,458,042 B1. The conventional golf club head  10  includes a ball-hitting face plate  11 , a threaded connection portion  12 , a top curved surface  13 , an arcuate side  14  and an air flow guiding slot structure  15 . The top curved surface  13  is joined with the ball-hitting face plate  11  and the arcuate side  14 . The juncture of the top curved surface  13 , the ball-hitting face plate  11 , and the arcuate side  14  is provided with the threaded connection portion  12  extending upwards therefrom. The threaded connection portion  12  is engaged with one end of a shaft of a golf club. The air flow guiding slot structure  15  is located in the top curved surface  13  and the arcuate side  14 . 
     When the conventional golf club head  10  is swung, the air current flows through the top curved surface  13  and the arcuate side  14 . As a result, an air pressure (P 1 ) is brought about on the top curved surface  13 , whereas an air pressure (P 2 ) is brought about on the arcuate side  14 . These two air flows enter the air flow guiding slot structure  15 , thereby resulting in equilibrium of the pressures P 1  and P 2 . As a result, the conventional golf club head  10  is not prone to float in the air at the time when the conventional golf club head  10  travels along a parabolic path. The conventional golf club head  10  is thus prevented from deviating from the intended path at such time when the conventional golf club head  10  is moved to hit the golf ball. 
     SUMMARY OF THE INVENTION 
     The present invention provides a golf club head having air flow guiding slot with uneven surface. The golf club head of the invention includes a ball striking plate, a connection portion, a top plate, a bottom portion and at least one air flow guiding slot. The connection portion is connected to the ball striking plate. The top plate is connected to the ball striking plate and the connection portion. The bottom portion is connected to the ball striking plate, the connection portion and the top plate. The at least one air flow guiding slot is mounted on the top plate and the bottom portion, is near to the connection portion, and has an uneven surface. 
     Utilizing the uneven surface of the at least one air flow guiding slot, the stability of air flow can be improved. Furthermore, the uneven surface is used to greatly increase the surface area of the air flow guiding slot so as to raise the weight so that the centre of gravity for the golf club head can be mounted on the at least one air flow guiding slot. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows the conventional golf club head; 
         FIG. 2  shows a top view of golf club head having air flow guiding slot with uneven surface according to a first embodiment of the present invention; 
         FIG. 2   a  shows a partial enlarged view of air flow guiding slot of golf club head according to the first embodiment of the present invention; 
         FIG. 2   b  shows a partial enlarged view of air flow guiding slot of golf club head according to another example of the first embodiment of the present invention; 
         FIG. 3  shows a side view of golf club head having air flow guiding slot with uneven surface according to the first embodiment of the present invention; 
         FIG. 4  shows a top view of golf club head having air flow guiding slot with uneven surface according to a second embodiment of the present invention; and 
         FIG. 5  shows a top view of golf club head having air flow guiding slot with uneven surface according to a third embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIG. 2 , it shows a top view of golf club head having air flow guiding slot with uneven surface according to a first embodiment of the present invention. Referring to  FIG. 3 , it shows a side view of golf club head having air flow guiding slot with uneven surface according to the first embodiment of the present invention. The golf club head  20  having air flow guiding slot with uneven surface of the invention includes a ball striking plate  21 , a connection portion  22 , a top plate  23 , a bottom portion  24  and at least one air flow guiding slot  25 . The connection portion  22  is connected to the ball striking plate  21 . The top plate  23  is connected to the ball striking plate  21  and the connection portion  22 . The bottom portion  24  is connected to the ball striking plate  21 , the connection portion  22  and the top plate  23 . 
     The at least one air flow guiding slot  25  is mounted on the top plate  23  and the bottom portion  24 , that is, a circular arc slot is formed on the top plate  23  and extends to the bottom portion  24 . The at least one air flow guiding slot  25  is near to the connection portion  22 , and has an uneven surface  251 . 
     Referring to  FIG. 2   a , it shows a partial enlarged view of air flow guiding slot of golf club head according to the first embodiment of the present invention. In this embodiment, the uneven surface  251  of the air flow guiding slot  25  includes a plurality of recesses  252 ,  253 . The recesses  252 ,  253  are round. In the other embodiment, the recesses can be triangular, rectangular or any kind of shape. The higher density of the recesses  252 ,  253  on the uneven surface  251  is better. Namely, as shown in  FIG. 2   a , the plurality of recesses  252 ,  253  forms a high-density pattern. 
     Referring to  FIG. 2   b , it shows a partial enlarged view of air flow guiding slot of golf club head according to another example of the first embodiment of the present invention. In this example, the uneven surface  351  of the air flow guiding slot  35  includes a plurality of protrusions  352 ,  353 . The protrusions  352 ,  353  are round. In the other embodiment, the protrusions can be triangular, rectangular or any kind of shape. As shown in  FIG. 2   b , the plurality of protrusions  352 ,  353  also forms a high-density pattern. 
     Utilizing the uneven surface of the at least one air flow guiding slot, the stability of air flow can be improved. Compared with the conventional golf club head, the golf club head of the invention can increase the stability of air flow about 30%. Furthermore, the uneven surface is used to greatly increase the surface area of the air flow guiding slot so as to raise the weight of the air flow guiding slot so that the centre of gravity for the golf club head can be mounted on the at least one air flow guiding slot. 
     Referring to  FIG. 4 , it shows a top view of golf club head having air flow guiding slot with uneven surface according to a second embodiment of the present invention. Compared with the golf club head of the first embodiment, the golf club head  40  of the second embodiment further includes at least one auxiliary slot  455 ,  456  mounted on the uneven surface  451  of the at least one air flow guiding slot  45 . In this embodiment, the at least one auxiliary slot  455 ,  456  are formed as circular arcs. In the other embodiment, the at least one auxiliary slot can be any kind of shape. 
     Referring to  FIG. 5 , it shows a top view of golf club head having air flow guiding slot with uneven surface according to a third embodiment of the present invention. The golf club head  50  of the third embodiment includes a first air flow guiding slot  55  and a second air flow guiding slot  56 . The first air flow guiding slot  55  is near to the connection portion  52 . The first air flow guiding slot  55  further includes at least one auxiliary slot  555 ,  556  mounted on the uneven surface  551  of the first air flow guiding slot  55 . In this embodiment, the first air flow guiding slot  55  and the second air flow guiding slot  56  are formed as circular arcs. The first air flow guiding slot  55  is bigger than the second air flow guiding slot  56 . 
     Utilizing the auxiliary slot or the second air flow guiding slot, the stability of air flow can be further improved. The area of the air flow guiding slot can be further increased so as to raise the weight of the air flow guiding slot so that the centre of gravity for the golf club head can be mounted on the air flow guiding slot. 
     While several embodiments of the present invention have been illustrated and described, various modifications and improvements can be made by those skilled in the art. The embodiments of the present invention are therefore described in an illustrative but not in a restrictive sense. It is intended that the present invention should not be limited to the particular forms as illustrated and that all modifications which maintain the spirit and scope of the present invention are within the scope defined in the appended claims.