Coupling device for a golf putter

Abstract

A coupling device is adapted for use in a golf putter. The golf putter includes a shaft and a head. The coupling device is adapted for interconnecting the shaft and the head, and includes a first coupling member and a second coupling member. The first coupling member is adapted to be connected to the shaft. The second coupling member is adapted to be connected to the head, and is pivotally connected to the first coupling member so that an angle between the shaft and the head is adjustable.

What is claimed is: 
     
         1 . A coupling device adapted for use in a golf putter, the golf putter including a shaft and a head, said coupling device being adapted for interconnecting the shaft and the head and comprising:
 a first coupling member that is adapted to be connected to the shaft; and   a second coupling member that is adapted to be connected to the head, and that is pivotally connected to said first coupling member so that an angle between the shaft and the head is adjustable.   
     
     
         2 . The coupling device as claimed in  claim 1 , further comprising a pivot joint that interconnects said first and second coupling members, and that is operable to convert between a lock position, where said second coupling member is in tight contact with said first coupling member so that pivot action of said second coupling member relative to said first coupling member is not permitted, and an unlock position, where pivot action of said second coupling member relative to said first coupling member is permitted. 
     
     
         3 . The coupling device as claimed in  claim 2 , wherein:
 said second coupling member is formed with a receiving groove, and a coupling groove spatially communicating with said receiving groove;   said first coupling member has
 a connecting portion defining a connecting groove that is adapted for insertion of the shaft, and 
 an extension portion connected to said connecting portion and engaging said receiving groove of said second coupling member; and 
   said pivot joint has
 a head portion engaging said coupling groove of said second coupling member, and 
 a stem portion extending from said head portion, and threadedly and releasably connected to said extension portion of said first coupling member. 
   
     
     
         4 . The coupling device as claimed in  claim 1 , further comprising a securing member adapted to extend upwardly into the head and connected fixedly to a bottom end of said second coupling member.