Hybrid golf club shaft
OwnerEdwin B. Fendelinventor
Life of this patent
Estimating the term…
Abstract
A golf shaft for attachment to a hossel of a club head, said shaft comprising: (a) a first section comprising a first material and having a hossel end and a first joint end, said first section having a linear weight no greater than 2.4 g/in; (b) a second section comprising a second material and having a butt end and a second joint end, said second joint end being connected to said first joint end; (c) wherein said second material is less dense than said first material; and (d) wherein said first material has a shear modulus greater than that of said second material.
Claims31
A golf shaft for attachment to a hosel of a club head, said shaft comprising:
- a first section comprising a first material and having a hosel end and a first joint end, said first section having a linear weight no greater than 2.4 g/n;
- a second section comprising a second material and having a butt end and a second joint end, said second joint end being connected to said first joint end;
- wherein said second material is less dense than said first material;
- wherein said first material has a shear modulus greater than that of said second material;
- and
- a stub adapted to be insertable in said hosel and said first section such that said first section and said hosel are butt joined, said stub comprising a composite material.
A golf shaft for attachment to a hosel of a club head, said shaft comprising:
- a first section comprising a first material and having a hosel end and a first joint end, said first section having a linear weight no greater than 2.4 g/n, wherein said first section has an outside diameter of no less than about 0.420″;
- a second section comprising a second material and having a butt end and a second joint end, said second joint end being connected to said first joint end;
- wherein said second material is less dense than said first material;
- and
- wherein said first material has a shear modulus greater than that of said second material.
A golf shaft for attachment to a hosel of a club head, said shaft comprising:
- a first section comprising a first material and having a hosel end and a first joint end, said first section having a linear weight no greater than 2.4 g/n;
- a second section comprising a second material and having a butt end and a second joint end, said second joint end being connected to said first joint end;
- wherein said first and second sections have a torsional stiffness no less than that of a 0.355″ O.D., 0.020″ thick, steel tube;
- wherein said second material is less dense than said first material;
- and
- wherein said first material has a shear modulus greater than that of said second material.
A golf club comprising:
- a head having a hosel;
- a first section comprising a first material and having a hosel end and a first joint end, said first section having a linear weight no greater than 2.4 g/n;
- a connector for connecting said first section to said hosel;
- a second section comprising a second material and having a butt end and a second joint end, said second joint end being connected to said first joint end;
- wherein said first and second sections have a torsional stiffness no less than that of a 0.355″ O.D., 0.020″ thick, steel tube;
- wherein said second material is less dense than said first material;
- and
- wherein said first material has a shear modulus greater than that of said second material.
Dependencies are inferred from the claim text.