Patent ID: 7695375

Claim:
A golf club shaft angle adjustment assembly comprising: a shaft; a club head having a face arranged for striking a golf ball and a back arranged opposite the face of the club head; said shaft having, at one end, a round member with a face that opposes the face of the club head when the shaft is attached to the club head; a round opening in the face of the club head for receiving the round member; a smaller round opening through the center of the round opening in the face; said smaller opening configured to open to the back of the club head for accepting a threaded post there-through; a threaded post attached to the round member and arranged to extend through the smaller opening; a nut removably attached to the threaded post from the back of the club head to secure the round member to the club head; an adjustable fastening arrangement that makes use of a substantial portion of the mating surfaces of both the opposing face of the round member and the round opening in the face of the club head; said adjustable fastening arrangement including a combination of half-spherical divots and a ball bearing; the round opening in the face of the club head and the opposing face of the round member each have a plurality of said half-spherical divots thereon spaced substantially evenly apart and arranged in a substantially circular path adjacent to the perimeter of each of the round opening in the face of the club head and the opposing face of the round member; said ball bearing fitting inside two of said half-spherical divots that face one another when said face of said round member is fitted against the round opening in the face of the head to orient the shaft with respect to the club head at a particular angle.