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Golf clubhead

Inactive Publication Date: 2004-07-01
ROGER CLEVELAND GOLF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016] Surprisingly, with the wedges having these characteristics, it is possible to very considerably increase the level of backspin, whereas it would have been expected that the level of friction between the ball and the strike face would markedly diminish and that consequently the backspin would be reduced.
[0020] In addition, the strike surface is very hard, which limits deformations by crushing or hammering, and makes it possible to retain the appearance of a surface of very low surface roughness by virtue of a good resistance to wear and abrasion.
[0023] In practice, it is advantageous to vary the surface roughness over the height of the strike face. Thus, with a strike face rougher in its lower part, and thus less rough in its upper part, a better performance in terms of increased backspin is observed.

Problems solved by technology

This backspin movement also has the effect of limiting the travel of the ball after it hits the ground.

Method used

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Embodiment Construction

[0013] The invention thus concerns a golf clubhead made from metal. This head has a strike face with a loft angle which is greater than 45.degree.. The strike face includes a plurality of grooves formed on the strike face.

[0014] According to the invention, the strike face has a surface roughness (Ra) of less than 0.25 micrometre, and the Vickers hardness of the strike face is greater than 5 GigaPascal, and preferably greater than 12 GigaPascal.

[0015] In other words, the invention consists in subjecting the strike face of the wedge to very substantial polishing, while at the same time ensuring a very high degree of hardness.

[0016] Surprisingly, with the wedges having these characteristics, it is possible to very considerably increase the level of backspin, whereas it would have been expected that the level of friction between the ball and the strike face would markedly diminish and that consequently the backspin would be reduced.

[0017] It should also be noted that the measures of red...

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Abstract

Golf clubhead (1) made from metal, having a strike face (2) which has a loft angle alpha of greater than 45°°, said strike (2) face having has a plurality of parallel grooves (10), characterized in that the strike face (2) has a surface roughness Ra of less than 0.25 micrometre, and in that the Vickers hardness of the strike face (2) is greater than 5 GigaPascal.

Description

[0001] The invention concerns the game of golf. It relates more specifically to metal golf clubheads which are used to execute short-distance shots. Clubs of this general type are referred to as wedges. The invention relates more particularly to characteristics of the strike face of such clubs which make it possible to improve their performance.PRIOR ART[0002] The clubs called wedges are generally used for very short approach shots, or for shots in which a bell-shaped trajectory is sought. These include, for example, shots which are made to get the ball out of difficult lies, in particular out of bunkers. In a known manner, the strike face of these clubs has a very pronounced inclination relative to the vertical. The inclination of the strike face relative to the vertical, also called the loft angle, is generally greater than 45.degree.on wedges. By means of this high loft, the trajectory of the ball is directed forwards but especially upwards, making it possible to execute the desi...

Claims

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Application Information

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IPC IPC(8): A63B53/04
CPCA63B53/04A63B2053/0479A63B2053/0408A63B53/047A63B2209/00A63B53/0408A63B60/00
Inventor ROESGEN, RICHARD J.BENNETT, DAVID M.
Owner ROGER CLEVELAND GOLF
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