Weighted iron set
The present invention generally relates to sets of iron golf clubs, and more particularly, to sets of iron golf clubs that are comprised of significant tungsten weighting to maximize the MOI about an axis through the CG that is parallel to the shaft axis.
1. A set of golf clubs comprising at least a first club head having a loft between about 15 and 25 degrees and a first club head mass, a second club head having a loft of between about 26 and 35 degrees and a second club head mass, and a third club head having a loft of about 36 degrees or greater and a third club head mass,
the first club head having a first center of gravity and comprising:
a body made of steel comprising a heel, a toe, a topline, a sole, a hosel defining a shaft axis, a front face and a back wall,
a toe weight member formed of tungsten and coupled to an upper toe portion of the back wall that comprises about 10% to 30% of the first club head mass, wherein a center of gravity of the toe weight member is spaced at least about 28 mm from an axis parallel to the shaft axis that extends through the first center of gravity; and
a heel weight member formed of tungsten and coupled a lower portion of the hosel, the heel weight member comprising about 5% to 20% of the first club head mass, wherein a center of gravity of the heel weight member is spaced at least about 28 mm from the axis parallel to the shaft axis that extends through the first center of gravity; and
wherein the second club head has a second center of gravity and comprises:
a second body made of steel comprising a second heel, a second toe, a second topline, a second sole, a second hosel defining a second shaft axis, a second front face and a second back wall,
a second toe weight member formed of tungsten and coupled to a second upper toe portion of the second back wall that comprises about 10% to 30% of the second club head mass, wherein a second center of gravity of the second toe weight member is spaced at least about 28 mm from a second axis parallel to the second shaft axis that extends through the second center of gravity; and
a second heel weight member formed of tungsten and coupled a second lower portion of the second hosel, the second heel weight member comprising about 5% to 20% of the second club head mass, wherein a second center of gravity of the second heel weight member is spaced at least about 28 mm from the second axis parallel to the second shaft axis that extends through the second center of gravity; and
wherein the first toe weight member and the second toe weight member are at least 30 grams.
2. The set of golf clubs of claim 1 , wherein the first club head has a Moment of Inertia about the axis parallel to the shaft axis that extends through the first center of gravity of greater than about 230 kg-mm 2 .
3. The set of golf clubs of claim 1 , wherein the second club head has a Moment of Inertia about the second axis parallel to the second shaft axis that extends through the second center of gravity of greater than about 230 kg-mm 2 .
4. The set of golf clubs of claim 3 , wherein the first club head has a Moment of Inertia about the axis parallel to the shaft axis that extends through the first center of gravity of greater than about 230 kg-mm 2 .
5. The set of golf clubs of claim 1 , wherein the first club head has a blade length of about 74 mm to 85 mm.
6. The set of golf clubs of claim 1 , wherein the second club head has a blade length of about 74 mm to 82 mm and is less than the blade length of the first club.
7. The set of golf clubs of claim 1 , wherein the first club head has a blade length of about 74 mm to 85 mm and the center of gravity of the toe weight member and the center of gravity of the heel weight member are both spaced a distance of at least about 30% of the blade length from the axis parallel to the shaft axis that extends through the first center of gravity.
8. The set of golf clubs of claim 1 , wherein the first club head has a blade length of about 74 mm to 85 mm and D1 plus D2 is greater than about 70% of the blade length, wherein D2 is a distance between the center of gravity of the toe weight member and the axis parallel to the shaft axis that extends through the first center of gravity and D1 is a distance between the center of gravity of the heel weight member and the axis parallel to the shaft axis that extends through the first center of gravity.
9. A set of golf clubs comprising at least a first club head having a loft between about 15 and 25 degrees and a first club head mass, a second club head having a loft of between about 26 and 35 degrees and a second club head mass, and a third club head having a loft of about 36 degrees or greater and a third club head mass,
the first club head having a first center of gravity and comprising:
a body made of steel comprising a heel, a toe, a topline, a sole, a hosel defining a shaft axis, a front face insert and a back wall defining a first hollow interior,
a toe weight member formed of tungsten and coupled into an upper toe portion of the first hollow interior that comprises about 10% to 30% of the first club head mass, wherein a center of gravity of the toe weight member is spaced at least about 28 mm from an axis parallel to the shaft axis that extends through the first center of gravity; and
a heel weight member formed of tungsten and coupled in a lower heel portion of the first hollow interior, the heel weight member comprising about 5% to 20% of the first club head mass, wherein a center of gravity of the heel weight member is spaced at least about 28 mm from the axis parallel to the shaft axis that extends through the first center of gravity; and
wherein the second club head has a second center of gravity and comprises:
a second body made of steel comprising a second heel, a second toe, a second topline, a second sole, a second hosel defining a second shaft axis, a second front face insert and a second back wall defining a second hollow interior,
a second toe weight member formed of tungsten and coupled to a second upper toe portion of the second hollow interior that comprises about 10% about 30% of the second club head mass, wherein a second center of gravity of the second toe weight member is spaced at least about 28 mm from a second axis parallel to the second shaft axis that extends through the second center of gravity; and
a second heel weight member formed of tungsten and coupled in a second lower portion of the second hollow interior, the second heel weight member comprising about 5% to 20% of the second club head mass, wherein a second center of gravity of the second heel weight member is spaced at least about 28 mm from the second axis parallel to the second shaft axis that extends through the second center of gravity; and
wherein the first toe weight member and the second toe weight member are at least about 30 grams.
10. The set of golf clubs of claim 9 , wherein the first club head has a Moment of Inertia about the axis parallel to the shaft axis that extends through the first center of gravity of greater than about 230 kg-mm 2 .
11. The set of golf clubs of claim 9 , wherein the second club head has a Moment of Inertia about the second axis parallel to the second shaft axis that extends through the second center of gravity of greater than about 230 kg-mm 2 .
12. The set of golf clubs of claim 9 , wherein the first club head has a blade length of about 74 mm to 85 mm.
13. The set of golf clubs of claim 9 , wherein the second club head has a blade length of about 74 mm to 82 mm.
14. A set of golf clubs comprising at least a first club head having a loft between about 15 and 25 degrees and a first club head mass, a second club head having a loft of between about 26 and 35 degrees and a second club head mass, and a third club head having a loft of about 36 degrees or greater and a third club head mass,
the first club head having a first center of gravity and comprising:
a body made of steel comprising a heel, a toe, a topline, a sole, a hosel defining a shaft axis, a front face insert and a back wall defining a first hollow interior,
a toe weight member formed of tungsten and coupled into an upper toe portion of the first hollow interior that comprises about 10% to 30% of the first club head mass, wherein a center of gravity of the toe weight member is spaced at least about 28 mm from an axis parallel to the shaft axis that extends through the first center of gravity; and
a heel weight member formed of tungsten and coupled in a front, lower portion of the hosel, the heel weight member comprising about 5% to 20% of the first club head mass, wherein a center of gravity of the heel weight member is spaced at least about 28 mm from the axis parallel to the shaft axis that extends through the first center of gravity; and
wherein the second club head has a second center of gravity and comprises:
a second body made of steel comprising a second heel, a second toe, a second topline, a second sole, a second hosel defining a second shaft axis, a second front face insert and a second back wall defining a second hollow interior,
a second toe weight member formed of tungsten and coupled to a second upper toe portion of the second hollow interior that comprises about 10% to 30% of the second club head mass, wherein a second center of gravity of the second toe weight member is spaced at least about 28 mm from a second axis parallel to the second shaft axis that extends through the second center of gravity; and
a second heel weight member formed of tungsten and coupled in a second front, lower portion of the second hosel, the second heel weight member comprising about 5% to 20% of the second club head mass, wherein a second center of gravity of the second heel weight member is spaced at least about 28 mm from the second axis parallel to the second shaft axis that extends through the second center of gravity; and
where the first club has a Moment of Inertia about the axis parallel to the shaft axis that extends through the first center of gravity to blade length ratio that is between about 3.1 kg-mm and 3.5 kg-mm.