Golf club head

This application is a continuation-in-part of U.S. patent application Ser. No. 11/705,054, entitled “GOLF CLUB HEAD”, filed Feb. 12, 2007, which is currently pending, which is a continuation-in-part of U.S. patent application Ser. No. 11/509,706 entitled “GOLF CLUB HEAD AND GOLF CLUB SHAFT”, filed Aug. 25, 2006, which is currently pending, which claims the benefit of U.S. Provisional Patent Application Serial No. 60/710,875, entitled “GOLF CLUB HEAD”, filed Aug. 25, 2005.

1. Field of the Invention

This invention relates to a golf club head. More particularly, the invention relates to a golf club head composed of a lightweight material offering improved strength and enhanced mass positioning within a golf club head.

2. Description of the Related Art

Golf club manufacturers are consistently attempting to design golf clubs that are easier to hit and offer golfers greater forgiveness when the ball is not struck directly upon the sweet spot of the striking face. As those skilled in the art will certainly appreciate, many designs have been developed and proposed for assisting golfers in learning and mastering the very difficult game of golf.

Much of the focus of the golf club heads is on ways to shift the weight within the golf club head in a manner which improves the striking characteristics of the club.

As such, a need exists for an improved golf club head which provides for greater versatility in shifting mass about a golf club head in a manner improving the striking characteristics of the golf club head. The present invention provides such a club head, which also provides a club head exhibiting improved strength characteristics.

It is, therefore, an object of the present invention to provide a golf club head a club head body, the club head body includes a striking face, a soleplate, a toe, a heel and a hosel. The club head body has a volume of at least approximately 300 cc and a mass of approximately 180 g to approximately 250 g. The club head body includes a body shell composed of the striking face, soleplate, toe and heel. The body shell has a mass of no more than 150 g, wherein at least a portion of the body shell is composed of a flexible material having a density of less than approximately 2.5 g/cm³ and tensile strength of at least approximately 465 MPa /(g/cm³) which is secured to a substrate with the flexible material facing an exterior of the club head. The flexible material is composed of carbon nanotubes formed into a yarn which is formed into a carbon nanotube sheet material of a predetermined size.

It is also object of the present invention to provide a golf club head wherein the shell includes a crown which is composed of carbon nanotubes.

It is another object of the present invention to provide a golf club head wherein the soleplate is composed of carbon nanotubes.

It is a further object of the present invention to provide a golf club head wherein the club head is a metal wood type golf club head.

It is also object of the present invention to provide a golf club head wherein the striking face has a loft of approximately 7 degrees to approximately 13 degrees.

It is another object of the present invention to provide a golf club head wherein the carbon nanotube sheet material is composed of a single carbon nanotube sheet.

It is a further object of the present invention to provide a golf club head wherein the yarn is composed of single wall carbon nanotubes.

It is also object of the present invention to provide a golf club head wherein the yarn is composed of multi-wall carbon nanotubes.

It is another object of the present invention to provide a golf club head wherein the yarn consists essentially of carbon nanotubes.

It is a further object of the present invention to provide a golf club head wherein the yarn includes carbon nanotubes and steel thread.

It is also object of the present invention to provide a golf club head wherein the carbon nanotube sheet material is composed of a laminate of multiple carbon nanotube sheets.