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US 6,203,449 B1Granted
Metallic hollow golf club head
AssigneeRoyal Collection Incorporated
InventorYoshinari Kenmi
Life of this patent
Estimating the term…
Abstract
A metallic golf club head includes a face having a plurality of scoring lines formed horizontally on a front surface of the face within a sweet area thereof, and a plurality of reinforcing ridges formed on a rear surface of the face. A plurality of ridges are formed along the scoring lines. Preferably, each reinforcing ridge is positioned right behind the corresponding scoring line so as to compensate a decreased thickness of the face caused by forming the scoring line.
Claims6
A metallic golf club head, comprising:
- a front striking face having a sweet area;
- a plurality of scoring lines formed horizontally on a front surface of said front striking face;
- a plurality of reinforcing linear ridges formed on a rear surface of said front striking face so as not to extend beyond said sweet area, each of said plurality of reinforcing linear ridges being formed along and positioned right behind a corresponding one of said scoring lines;
- and
- a plurality of linear grooves each extending between said adjacent reinforcing linear ridges, whereby each of said plurality of linear grooves has the same length as a length of each of said plurality of reinforcing linear ridges.
2 more elements
A metallic golf club head, comprising:
- a front striking face having a sweet area;
- a plurality of scoring lines formed horizontally on a front surface of said front striking face;
- a plurality of reinforcing linear ridges formed on a rear surface of said front striking face so as not to extend beyond said sweet area;
- said plurality of reinforcing linear ridges formed along said scoring lines, each of said reinforcing linear ridges being positioned right behind a corresponding one of said scoring lines;
- and
- a plurality of linear grooves each extending between said adjacent reinforcing linear ridges, whereby each of said plurality of linear grooves has the same length as a length of each of said plurality of reinforcing linear ridges.
- wherein a thickness of said front striking face falls within the range of from 2.5 to 3.5 mm, and that of the portion other than said front striking face falls within the range of from 0.5 to 1.5 mm, and
- wherein a width of said reinforcing linear ridge falls within the range of from 1.0 to 3.5 mm, and a height of said reinforcing linear ridge falls within the range of from 0.8 to 2.0 mm.
5 more elements
Dependencies are inferred from the claim text.