Iron type golf club head
First Claim
Patent Images
1. A golf club comprising an iron type golf club head formed of a composite material comprising light metal containing silicon carbide whiskers and occupying 20% or more by volume of said club head.
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Accused Products
Abstract
An iron type golf club head comprising a composite material of light metal or synthetic resin containing silicon carbide whiskers at 2 to 80% by volume and occupying 20% or more by volume of the body of the club head. The club head can be 10 to 60% lighter than a club head made entirely of steel with the same configuration and size, while the moment of inertia is approximately the same. Weight metal inserts having a specific gravity greater than steel can also be embedded in the club head.
140 Citations
23 Claims
- 1. A golf club comprising an iron type golf club head formed of a composite material comprising light metal containing silicon carbide whiskers and occupying 20% or more by volume of said club head.
- 8. A golf club comprising an iron type golf club head formed of a composite material comprising synthetic resin containing silicon carbide whiskers and occupying 20% or more by volume of said club head.
- 14. A golf club comprising an iron type golf club head formed of a composite material comprising light metal containing silicon carbide whiskers and occupying 20% or more by volume of said club head so that the weight of said club head is 10 to 60% lighter than a club head made entirely of steel having the same configuration and size with the condition that the moment of inertia is approximately the same.
- 17. A golf club comprising an iron type golf club head formed of a composite material comprising synthetic resin containing silicon carbide whiskers and occupying 20% or more by volume of said club head so that the weight of said club head is reduced by 10 to 60% to be lighter than a club head made entirely of steel and having approximately the same configuration and size as the club head made entirely of steel.
- 19. A golf club comprising an iron type golf club head formed of a composite material comprising light metal containing silicon carbide whiskers and forming a major part of said head, provided with metal weight inserts each having a specific gravity greater than that of steel and embedded into portions lying apart from the center of gravity of the club head on lower portions thereof, and adapted to possess an increased moment of inertia around said center of gravity with the condition that the configuration, size, and weight of said club head are identical with those of a club head made entirely of steel.
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21. A golf club comprising an iron type golf club head formed of a composite material comprising synthetic resin containing silicon carbide whiskers and forming a major part of said club head, provided with weight metal inserts each having a specific gravity greater than the specific gravity of steel and embedded into portions lying apart from the center of gravity of the club head on the lower portions thereof, and adapted to possess an increased moment of inertia around said center of gravity with the condition that the configuration, size, and weight of said club head are identical with those of a club head made entirely of steel.
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22. A golf club comprising an iron type golf club head formed of a composite material comprising synthetic resin containing silicon carbide whiskers and forming a major part of said club head, provided with a weight metal insert having a specific gravity greater than the specific gravity of steel and embedded into a sole portion of the club head with the condition that the configuration, size, and weight of said club head are identical with those of a club head made entirely of steel.
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23. A golf club comprising an iron type golf club head formed of a composite material comprising synthetic resin containing silicon carbide whiskers and forming a major part of said club head, provided with a weight metal insert having a specific gravity greater than the specific gravity of steel and embedded in a sole portion of the club head with the condition that the configuration, size, and weight of said club head are identical with those of a club head made entirely of steel.
Specification