Patent ID: 8382607

Claim:
A length adjustment system for joining a golf club head ( 100 ) to a shaft ( 1100 ), comprising: a) a shaft sleeve ( 200 ) attached to an end of the shaft ( 1100 ) that cooperates with a hosel ( 120 ) of the golf club head ( 100 ); b) a retainer ( 300 ) releasably securing the shaft ( 1100 ) to the golf club head ( 100 ); c) at least a first spacer ( 500 ) able to be secured within the hosel ( 120 ) by the retainer ( 300 ); d) a first hosel sleeve ( 600 ) able to cooperate with the hosel ( 120 ) and receive the shaft sleeve ( 200 ); e) at least a minor length weight system ( 400 ) and an intermediate length weight system ( 700 ); f) wherein in a minor length configuration the shaft sleeve ( 200 ) is releasably secured to the golf club head ( 100 ) by the retainer ( 300 ) producing a minor length of a golf club, and the minor length configuration has a minor length weight comprising the weight of the golf club head ( 100 ), the shaft sleeve ( 200 ), the retainer ( 300 ), and the minor length weight system ( 400 ), wherein the minor length weight produces a minor length center of gravity (CGm) and a minor length moment of inertia; and g) wherein in an intermediate length configuration the shaft sleeve ( 200 ), the first spacer ( 500 ), and the first hosel sleeve ( 600 ) are releasably secured to the golf club head ( 100 ) by the retainer ( 300 ) producing an intermediate length of a golf club, and the intermediate length configuration has an intermediate length weight comprising the weight of the golf club head ( 100 ), the shaft sleeve ( 200 ), the first spacer ( 500 ), the first hosel sleeve ( 600 ), the retainer ( 300 ), and the intermediate length weight system ( 700 ), wherein the intermediate length weight produces an intermediate length center of gravity (CGi) and an intermediate length moment of inertia; and h) the intermediate length is at least ¼ inch greater than the minor length; and i) the intermediate length weight is within 5 percent of the minor length weight; and j) the intermediate length moment of inertia is within 10 percent of the minor length moment of inertia; and k) the X, Y, and Z coordinates of the intermediate length center of gravity (CGi) are all within 15 percent of the X, Y, and Z coordinates of the minor length center of gravity (CGm).