Games using tangible projectile – Golf – Club or club support
Patent
1997-10-09
1999-03-30
Passaniti, Sebastiano
Games using tangible projectile
Golf
Club or club support
473337, 473345, 473346, 473329, A63B 5304
Patent
active
058881484
ABSTRACT:
A golf club head with an internal power shaft that extends along the target line. In a high volume club head embodiment above 250 cm..sup.3, constructed of a low modulus alloy compared to stainless steel, the power shaft has a preload, or static compression, to increase the modulus of elasticity of the head and ball striking face. This preload technique is expanded in another embodiment into a semi-customized line of golf club woods, where the club head modulus of elasticity increases with the golfer's club head speed by progressively increasing preload in the club head line. The power shaft is press-fitted into the rear of the ball striking face to reduce bonding and welding difficulties in joining the power shaft to the ball striking face. The modulus of the face wall and the power shaft is enhanced by casting or welding the sole plate of the club head along an axial extent directly to the outer surface of the power shaft thereby increasing its columnar strength. This unique club is assembled by casting the club head in two pieces parting along a vertical plane parallel to the club face, one forward and one rear, and assembling the head by clamshelling the power shaft between the forward wall and rear pieces and then welding or otherwise bonding the forward and rear pieces together. By applying opposite axial clamping forces to the two club head pieces during and after welding or other heat bonding, the power shaft is preloaded into a static compression state.
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patent: 5718641 (1998-02-01), Lin
Allen Dillis V.
Blau Stephen L.
Passaniti Sebastiano
Vardon Golf Company, Inc.
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