Games using tangible projectile – Golf – Club or club support
Patent
1998-02-17
1999-10-19
Passaniti, Sebastiano
Games using tangible projectile
Golf
Club or club support
473349, 473409, A63B 5304
Patent
active
059679050
ABSTRACT:
A golf club head comprises an outer titanium club-head shell, and a titanium sole portion integrally coupled to the outer club-head shell. A weight fitting hole is bored in the sole portion, and a plurality of cutouts are formed in the inner peripheral edge portion of the fitting hole. A weight made of metal having a specific gravity higher than that of titanium is inserted into the fitting hole, and the weight is fixed to the sole portion after press-deformed so that its outer peripheral edges are press-fitted into the respective cutouts. A method for producing a golf club head comprises the steps of molding the outer club-head shell from titanium, molding the sole portion having the weight fitting hole from titanium, forming the plurality of cutouts in the inner peripheral edge portion of the fitting hole of the sole portion, inserting the weight made of metal having a specific gravity higher than that of titanium into the fitting hole, fixing the weight to the sole portion by press-deforming the weight in such a way as to press-fit the outer peripheral edges of the weight into the respective cutouts, and coupling the outer club-head shell and the sole portion integrally by welding.
REFERENCES:
patent: 4630825 (1986-12-01), Schmidt et al.
patent: 4795159 (1989-01-01), Nagamoto
patent: 5294037 (1994-03-01), Schmidt
patent: 5564705 (1996-10-01), Kobayashi
patent: 5658207 (1997-08-01), Aizawa
patent: 5669825 (1997-09-01), Shira
patent: 5720673 (1998-02-01), Anderson
Nakahara Norihiko
Ono Shigeki
Yamamoto Shinji
Yoshida Toru
Mitsubishi Materials Corporation
Passaniti Sebastiano
The Yokohama Rubber Co. Ltd.
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