US Patent 12070660 Golf club heads with hosel inserts and related methods

A golf club head includes a hosel and a shaft sleeve insertable into the hosel, A shaft sleeve body of the shaft sleeve, the shaft sleeve body includes an outer wall and a first coupler protruding from the sleeve outer wall and having a first coupler surface area, a second coupler protruding from the sleeve outer wall and having a second coupler surface area, a third coupler protruding from the sleeve outer wall and having a third coupler surface area, and a fourth coupler protruding from the sleeve outer wall and having a fourth coupler surface area. Each of the first second, third and fourth couplers has an arcuate surface continuously curved throughout its respective surface area.