Patent ID: 9283446
Filing Date: 2016-03-15
CPC Classification: A63B

Claim Text:
1. A golf club comprising a golf club head and a shaft attached to the golf club head, the golf club comprising: the golf club head provided with a shaft insertion hole having an upper opening and a lower opening, the shaft insertion hole having an internal surface provided with an undercut groove; the shaft having a tip end; a shaft sleeve adaptor attached to the tip end of the shaft, the shaft sleeve adaptor inserted into the shaft insertion hole through the upper opening and having a first thread portion; a fastener comprising a second thread portion engaging with the first thread portion of the shaft sleeve adaptor through the lower opening of the shaft insertion hole; and a washer held in the undercut groove of the shaft insertion hole and disposed between the fastener and the shaft sleeve adaptor wherein sides of the groove are adjacent each flat side of the washer such that the washer is held in the undercut groove no matter how the head is oriented when the fastener and the shaft sleeve are removed from the head.