초록 ▼

A golf club putter is constructed with a head having a high polar moment of inertia about its preferred ball striking point by forming the putter head body out of light weight material, such as aluminum, with relatively large heel and toe cavities. A predetermined mass of heavy material such as molt

A golf club putter is constructed with a head having a high polar moment of inertia about its preferred ball striking point by forming the putter head body out of light weight material, such as aluminum, with relatively large heel and toe cavities. A predetermined mass of heavy material such as molten lead is poured into the cavities along with a small amount of uncured epoxy. At the temperature of molten lead, epoxy loses much of its viscosity and flows on the surface of the lead to fill voids caused by contraction of the lead. A thin cover preferably of a decorative material like polished brass then is bonded to a flange formed about each cavity by the epoxy to close each cavity.

대표청구항 ▼

A golf club head including: a body casting constructed from material having a first predetermined density, said body casting having: a front golf ball striking surface; a heel cavity having cast and adhesively bonded therein a predetermined amount of a material having a second predetermined density

A golf club head including: a body casting constructed from material having a first predetermined density, said body casting having: a front golf ball striking surface; a heel cavity having cast and adhesively bonded therein a predetermined amount of a material having a second predetermined density substantially more dense than said first predetermined density; and a toe cavity having cast and adhesively bonded therein a predetermined amount of a material having said second predetermined density whereby said head has a high polar moment of inertia to resist turning forces applied to said face; and a back surface through which said heel and toe cavities open, said heel and toe cavities each including: a peripheral flange formed adjacent said back surface, and said head further including: a heel plate connected to said heel flange to close said heel cavity at said back surface; and a toe plate connected to said toe flange to close said toe cavity at said back surface, wherein said body further includes: a sole surface intersecting said front golf ball striking surface; and a center of gravity, said front golf ball striking surface having: a golf ball striking spot thereon about a golf ball radius above said sole surface, said golf ball striking spot being above said center of gravity.