Patent ID: 8142307

Claim:
A golf club mechanism comprising: a first first-type coupler of one or more first-type couplers at a bottom surface of a shaft receiver of a club head; a first second-type coupler of one or more second-type couplers at a bottom surface of a shaft adapter; a second first-type coupler of the one or more first-type couplers at the bottom surface of the shaft receiver of the club head; and a second second-type coupler of the one or more second-type couplers at the bottom surface of the shaft adapter; wherein: a centerpoint of the first first-type coupler is offset from a centerpoint of the bottom surface of the shaft receiver; a centerpoint of the first second-type coupler is offset from a centerpoint of the bottom surface of the shaft adapter; the first first-type coupler is closer in proximity to the centerpoint of the bottom surface of the shaft receiver than the second first-type coupler; the shaft adapter is configured to couple with an end of a club shaft; the first second-type coupler is configured to interlock with the first first-type coupler to restrict a rotational movement of the shaft adapter relative to the shaft receiver; the second second-type coupler is configured to interlock with the second first-type coupler when the first second-type coupler is interlocked with the first first-type coupler; and when interlocked, the one or more first-type and the one or more second-type couplers maintain an orientation of the club shaft relative to the club head.