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US 4,964,640 AGranted
Iron club head for golf
AssigneeYamaha Corporation
InventorsTatsuo Nakanishi, Toyohiko Tadokoro, Masaki Fujimura
Life of this patent
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AssigneeYamaha Corporation
InventorsTatsuo Nakanishi, Toyohiko Tadokoro, Masaki Fujimura
Estimating the term…
In construction of a composite type iron club head for golf having a fiber reinforcement, a synthetic resin backup is used as a substitute for the conventional ring for holding the fiber reinforcement in postion, thereby improving productivity and inertia moment of iron clud head. The fiber reinforcement, which can be of solid or hollow construction, and the synthetic resin back up are disposed in a recess provided on the side of the club head remote from the shooting surface. A mass can be adjustably imbedded in the synthetic resin backup so as to increase the inertial moment of the club head. A rise member extending upwardly from the sole face of the clud head can also be provided so that the center of gravity can be more easily adjusted. Undercuts can also be provided about the periphery of the recess to further facilitate the fixing of the fiber reinforcement within the recess and to provide additional fiber reinforcement in the peripheral sections of the club head. To further provide additional fiber reinforcement in the peripheral sections of the club head, a plano-concave surface can be provided on the side of the club head remove from the shooting surface.
An iron-type golf club head comprising, a main body member having a front side and a rear side, said rear side including a sole portion and a recess, said front side including a wall section having an inner surface in communication with said recess and a shooting surface remote from said inner surface, said sole portion having an upwardly extending rear rise spaced from said inner surface of said wall section, said rear rise being of a predetermined length, width and weight to facilitate the adjustment of the center of gravity of the golf club head, a fiber reinforcement member disposed in said recess adjacent said inner surface of said wall section, and support means for fixing said fiber reinforcement member in said recess.
An iron-type golf club head comprising, a main body member having a front side and a rear side, said rear side including a recess, said front side including a wall section having an inner surface in communication with said recess and a shooting surface remote from said inner surface, a fiber reinforcement member disposed in said recess adjacent said inner surface of said wall section, said fiber reinforcement member being of a hollow construction, and support means for fixing said fiber reinforcement member in said recess.
Dependencies are inferred from the claim text.