Golf club set
AssigneeBridgestone Corporation
InventorsHiroshi Ezaki, Yoneji Kobayashi, Katsumi Iida
Life of this patent
Estimating the term…
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AssigneeBridgestone Corporation
InventorsHiroshi Ezaki, Yoneji Kobayashi, Katsumi Iida
Estimating the term…
The golf club set according to the present invention consists of plural golf clubs of which the lofts are increased iron a predetermined order, preferably with increments of 3.degree. to 4.degree.. The heads of golf clubs with lofts ranging from 9.degree. to 25.degree. in the set being constructed with a sole plate attached to a shell of a synthetic resin and integrally formed with a core, the heads of golf clubs with lofts ranging from 22.degree. to 31.degree. being constructed with a shell of a synthetic resin, core and sole plate formed integrally with one another, and the heads of golf clubs with lofts ranging from 28.degree. to 50.degree. being constructed with a mass of a high specific gravity synthetic resin and a sole plate molded integrally with each other.
A golf club set comprising first, second and third groups of golf clubs, each of the clubs in the set comprising a shaft connected to a head at one end of said shaft, each of the heads having a hitting face for hitting a golf ball, said hitting face being inclined to define a loft angle, each of the clubs of the set having said loft angle selected from the range of 9.degree. to 50.degree., the loft angle of each of the clubs in the set being different and increasing within said first, second and third groups, each of the clubs having a shaft length decreasing from club to club as the loft angle increases from club to club, each of the heads having a center of gravity a distance Z from the hitting face and located within the head, the distance Z decreasing from club to club as the loft angle increases from club to club, each golf club head of the first group of golf clubs having a loft angle selected in the range of from 9.degree. to 25.degree., each golf club head of the first group of clubs being constructed with a sole plate attached to a first group shell molded of a synthetic resin, a filled cavity formed within the first group shell, each golf club head of the second group of golf clubs having a loft angle selected in the range of from 22.degree. to 31.degree. and being constructed with a seconnd group shell of a synthetic resin, a filled cavity formed within the second group shell and a sole plate integrally molded with the second group shell, and each golf club head of the third group of golf clubs having a loft angle selected in the range of from 28.degree. to 50.degree. and being constructed with a solid means of synthetic resin having a relatively high specific gravity as compared to the synthetic resin of the first group shell and the second group shell, and a sole plate integrally molded with the solid mass of synthetic resin.
Dependencies are inferred from the claim text.