JP2000288129A - Set of golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make keepable the initial locus of a ball practically constant for the whole set by adjusting the weight of the upper portion of a peripheral weight, the mass element of a cavity back and the weight of a sole so that the center of gravity is raised in short irons than in long irons. SOLUTION: A golf club head 10 includes a heel, a toe, a front face 16 and a back face on the opposite side to the front face 16. A peripheral weight having an upper portion 30 and a lower portion 32 and specifying a cavity is formed on the back face. In this golf club head 10, the weight of the upper portion 30 of the peripheral weight, an upper cavity weight 34a, a lower cavity weight 34b and the weight of a sole are adjusted so that the center of gravity is raised in short irons than in long irons. The center of gravity may be changed by using a material with a high density at various portions of the club head 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates generally to golf club sets, and more particularly to a more consistent ball flight peak trajectory altitude along a straight line, wherein each iron in the set is provided. And a set of golf club irons having a center of gravity that varies from

[0002]

BACKGROUND OF THE INVENTION In a conventional set of "iron" golf clubs, each club included a shaft having a club head attached at one end and a grip attached to the other end. . The club head includes a face for hitting a golf ball. The angle between the face and the vertical plane is called the "loft".

[0003] The set generally includes irons numbered 1-9 and a series of wedges such as pitching wedges, lob wedges, gap wedges and sand wedges. The length of each iron typically decreases throughout the set as the loft of each club head increases from long irons to short irons. The length of the club, along with the club head loft and the center of gravity, impart various performance characteristics to the launch of the ball during a collision. The initial trajectory of the ball extends between the collision point and the top of the trajectory, that is, the peak. This early part of the ball trajectory is important to the golfer because it is visible when the ball is hit. Long irons, such as No. 2 irons, produce sharper initial trajectories. Short irons, such as a ninth iron and a pitching wedge, have a lower acute angle than a ball trajectory hit with a long iron. The highest score for a long iron ball flight is lower than the highest score for a short iron ball flight. The initial trajectory of a mid-iron, such as a 5-iron, is between the initial trajectories of a ball hit with a long iron and a short iron.

[0004] Since golfers see a different initial trajectory for each iron number, golfers tend to change their swing from club to club in order to have a consistent initial trajectory between clubs. For all club heads in a set, it is desirable that golfers generate a consistent peak trajectory altitude along a straight line without having to change their swing. This allows golfers to use consistent swings, which will increase their ability and confidence.

[0005] It is therefore desirable to provide a golf club set in which the initial trajectory of the ball is substantially constant throughout the set.

[0006]

SUMMARY OF THE INVENTION A set of golf club heads according to the present invention is disclosed. The golf club head included in this set has a sole and a cavity back. The back cavity contains at least one mass element or cavity weight. The weight of the upper portion of the peripheral weight, the mass element of the cavity back and the weight of the sole can be changed so that the center of gravity rises from a long iron to a short iron. The center of gravity can also be varied within the set by using dense materials for various portions of the club head. By raising the center of gravity from a long iron to a short iron, the golfer sees a peak trajectory altitude along a straight line for each club head, but along a straight line across the entire set, rather than provided by prior art clubs. And is substantially more consistent.

[0007]

DETAILED DESCRIPTION OF THE INVENTION Referring to FIGS. 1-3, an "iron" golf club head 10 is illustrated. The golf club head 10 includes a heel 12, a toe 14, a front face 16, and a back face 18 opposite the front face 16. The hosel 20 extends from the heel 12 of the head. Referring to FIG. 4, hosel 20 is offset in this embodiment because the front surface of the hosel is in front of leading edge 21 of the club head. However, in another embodiment, the club head may have no offset. Referring again to FIG. 1, head 10 further includes an upper surface or topline edge portion 22 and a lower surface or sole 24.
The top line 22 and the sole 24 are both
From the toe 14.

Referring to FIGS. 2 and 3, the back face of the head further includes a peripheral or peripheral weight 26 defining a cavity 28. Perimeter weight 26
Has an upper portion 30 and a lower portion 32.

[0009] The cavity 34 further includes a first or upper cavity weight 34a and a second or lower cavity weight 34b. The upper weight 34a extends from the upper portion 30 of the peripheral weight 26 toward the lower portion 32 of the peripheral weight 26. The lower weight 34b is a lower portion 32 of the peripheral weight 26.
To the upper portion 30 of the peripheral weight 26. The weights 34a and 34b extend from the heel 12 to the toe 1
4 and the lower weight 34b has a radius in the toe direction within the heel. The upper and lower cavity weights 34a and 34b are spaced apart, thereby forming a gap 35 therebetween. Upper weight 34a
The surface 36 of the lower weight 34b and the surface 38 of the lower weight 34b are shaped so that the gap 35 has an arch shape from the toe to the heel. Cavity weights 34a and b extend from the back face 18 of the head.

Referring to FIG. 3, the number of the club head size will be described. The golf club head 10 includes a loft angle θ which is an angle formed between the front face 16 and a vertical plane V perpendicular to the ground. The thickness of the top line 22 is specified by the arrow T1. The maximum thickness of the upper portion 30 of the peripheral weight is designated by arrow T2. The thickness of upper weight 34a is designated by arrow T3. The thickness of lower weight 34b is designated by arrows T4A and B. The widest portion of lower weight 34b is designated by arrow T4A. Lower weight 34b
Is designated by arrow T4B. In this embodiment, the lower weight 34a is sized so that the thickness gradually decreases between the thickness T4A and the intermediate thickness T4B. With such a gradual decrease, the thicknesses T4A and B can be connected by a radius. The upper weight has a back surface generally parallel to the front face 16. The thickness T5 of the club head over the entire gap 35 is the narrowest portion of the club head and extends between the front face 16 and the back face 18. Thus, the thickness T5 is the thickness of the strike face. By adding the peripheral weight and the cavity weight, the thickness of the peripheral weight and the cavity weight becomes larger than the thickness of the strike face. The thickness measurement values T1 to T5 are the values for the front face 1
At right angles to 6, it is taken between the front face 16 and the back surface of the club head. The thickness of sole 24 is designated by arrow T6. The thicknesses T1 and T6 are taken where the radius ends on the upper and lower surfaces.

Referring to FIG. 5, a golf club head 1 is shown.
0 is shown incorporated in the golf club 42 which is the first iron. Golf club 42 includes a shaft 44 and a grip 46. One end of the shaft 44 is received in the hosel 20 and the other end of the shaft 44 has a grip 46. The first iron has a length designated by L1. The remaining clubs are L2
~ LL length. Long irons are irons from 1 iron to 4 irons, mid irons are irons from 5 irons to 7 irons, and short irons are irons from 8 irons to lob wedges (LW).
The short iron includes a series of wedges including a pitching wedge PW, a sand wedge SW, and a lob wedge LW. FIG. 5 shows a long iron to a short iron in the club set 48, where the length of the club decreases as going from the long iron to the short iron. The lie angle between clubs can also vary.

Referring to FIG. 6, a first embodiment of the illustrated set includes 1 to 9 irons and a pitching wedge. In this set, as described above, the club length decreases from long irons to short irons, thereby gradually reducing the length from long irons to short irons throughout the set, as will be appreciated by those skilled in the art. In this set, the height of each club head increases at the toe end, the blade length increases,
The lie angle is substantially increased and the sole width at the bottom surface of the sole increases from long irons to short irons.
Further, in the set 48 (see FIG. 5) and the set shown in FIG. 6, the loft angle θ (see FIG. 3) for each club increases from long iron to short iron through the set, as will be appreciated by those skilled in the art.

Referring to FIGS. 3 and 6, the center of gravity of each club is varied throughout the set to obtain a substantially consistent peak trajectory along a straight line throughout the set. Referring to FIG. 7, it is shown 1 iron of iron set in FIG. 6, 5 iron, 8 iron and each centroid pitching wedge Cg _1, Cg _5, Cg ₈ and Cg _PW. This center of gravity is lowest on long irons, rising almost vertically from long irons to short irons. The center of gravity is processed to provide a substantially consistent peak trajectory along a straight line throughout the set, as described below.

Changing the center of gravity in this method is accomplished by changing the thickness of the upper and lower portions of the club head. In this embodiment, the thickness T of the top line 30
2 and the thickness T3 of the upper weight 34a increase from a long iron to a short iron. Lower weight 3
4b thicknesses T4A and T4B are kept substantially constant from long iron to short iron. The strike face thickness T5 of the head is also kept substantially constant from the long iron to the short iron.
The thickness T1 of the top surface of each club head remains substantially constant from long irons to short irons. As a result, when the golfer looks down at the top line of the club head, the golfer sees a substantially consistent top line thickness throughout the set. The thickness of the top line is changed by changing the thickness T2 of the top line below the upper weight 34a on the upper surface. The thickness T2 is varied at an angle on the golfer's gaze such that the top surface thickness T1 looks the same to the golfer throughout the set. Thickness T of sole 24
6 is substantially constant throughout the set when measured perpendicular to the front face. However, in alternative embodiments, the thickness of these soles may be varied to achieve the objectives of the present invention.

In a first embodiment, the club head is cast such that the peripheral weight, cavity weight and club head are integral and formed of one material.
The club head may be cast or forged from 431 stainless steel or other materials, including alloys well known to those skilled in the art of making clubs. The club is also part 1
The one or more parts can also be formed by joining in various ways, for example, by welding, silver soldering, brazing or mechanical attachment by fasteners.

In another embodiment, the set according to the first embodiment is modifiable so that the thickness of the lower weight decreases from long irons to short irons, further allowing the center of gravity in the set to be shifted. is there. In yet another embodiment, the set according to the first embodiment is such that the top line thicknesses T1 and T2 are equal to each other in one club, but the top line thickness increases from long iron to short iron. Can be modified.

[0017]

These and other aspects in accordance with the present invention should be construed as limiting the invention which is merely illustrative of a golf club set according to a preferred embodiment of the present invention and which is defined by the appended claims. Rather, it may be more fully understood with reference to the following non-limiting example. Table 1
Gives, by way of example, the non-limiting sizes of the various measurements of the club shown in FIG.

[0018]

[Table 1] As can be seen from Table 1, the thickness T1 of the top surface of the top line is substantially constant from long irons to short irons. The top line thickness T2 increases by 0.008 inches from long iron to short iron. The thickness T3 of the upper weight increases by 0.008 inches from long iron to short iron. The thicknesses T4A and T5 are substantially constant. The vertical direction Cg is measured from the leading edge 21 (see FIG. 7) to the center of gravity of the club. The overall result of the increase in top line and top cavity weight thickness from long iron to short iron is that the center of gravity is lower from long iron to short iron, as revealed by the centroid measurement above. Moving to a higher position. Although various sizes have been described as being substantially constant throughout the set, these values will vary with reasonable casting or forging and finishing tolerances.

Referring to FIG. 8, the ball flight trajectory of a prior art club is compared with the ball flight trajectory of a club formed according to the present invention. FIG. 8 is a graph of altitude versus distance. The straight line LOS represents the line of sight of the golfer looking at each ball in flight. PA _S, PA _M, ball flight trajectory which is distinguished PA _L represents the prior art short respectively by iron, the ball flight trajectory indicated ball hit by the set mid irons and long irons. The ball trajectories marked I _S , I _M , and I _L represent the ball trajectories exhibited by the balls hit by the set of short irons, mid irons, and long irons, respectively, formed in accordance with the present invention. Each ball trajectory according to the prior art includes a trajectory or peak trajectory altitude of the flight marked A _PAS , A _PAM and A _PAL for each short, mid and long iron respectively. Each ball trajectory according to the invention comprises short, mid, A _IS for each of the long iron, the vertex or highest point of the flight, marked with A _IM and A _IL.

Referring to FIG. 8, the ball flight trajectory for the prior art short iron PA _S has a vertex A _PAS that exceeds the golfer's line of sight LOS. Ball flight trajectory of the short iron I _S according to the invention have a substantially equal vertex A _1S-sight LOS golfers. The impact angle at which the ball hits the ground will depend on whether there is a tailwind or headwind, but will ultimately affect the range of impact the ball will see. The collision range of a short iron according to the prior art is about 6 yards, and the collision range of the short iron according to the present invention is believed to be about 3 yards, a decrease of about 50%. The result is that the apex of the club according to the invention is aligned with the golfer's line of sight and is therefore less affected by headwinds or tailwinds, and thus has a smaller collision range, and therefore allows golfers to fly more with this new short iron. Can be controlled well. In addition, the vertex A _PAS according to the prior art is very high compared to the vertex A _IS , so that golfers, especially under windy conditions, may want to adjust their swing or reduce clubs with lower lofts to reduce the peak. Tend to choose. With the club according to the invention, golfers do not need to change their swing or club.

Referring to FIG. 8, ball flight trajectory mid irons PA _M according to the prior art has a vertex A _PAM, ball flight trajectory mid irons I _M according to the invention has a vertex A _IM. The vertices A _PAM and A _IM are both approximately equal to the golfer's line of sight LOS. The collision range of the prior art mid-iron and the mid-iron according to the present invention is about the same.

[0022] Referring to FIG. 8, ball flight trajectory of the long iron PA _L according to the prior art has a lower vertex A _PAL than the line of sight LOS golfers. Ball flight trajectory of the long iron I _L according to the invention have a substantially equal vertex A _IL gaze LOS golfers. Since the initial ball flight of a long iron according to the prior art is very sharp, hitting the ball with such an iron is likely to roll when striking the ground. As a result, the range of impact, including the flight and rolling distance of the ball in the case of prior art long irons, depends on the terrain of the golf course, but is determined where the ball stops. The collision range of the prior art long iron is about 12 yards, and the collision range of the long iron according to the present invention is about 50 yards.
It is believed to have decreased by about 6 yards. As a result of the apex of the club according to the present invention being aligned with the line of sight of the golfer, the ball comes more perpendicular to the ground than a ball hit with a long iron according to the prior art, so that the collision range in which the ball comes to rest is It becomes narrower. The ball according to the present invention reduces the range of flight indicated by the ball, which in turn reduces the rolling distance indicated by the ball.

The shorts, mids, and sets of the set according to the invention
Since the long iron now exhibits a ball flight trajectory that has a vertex in the line of sight of the golfer, the trajectory will be more consistent along a straight line to the golfer throughout the set. Thus, by varying the center of gravity of each club head from long irons to short irons according to the present invention, the peak trajectory altitude along a straight line appears to be substantially consistent across the clubs in the set.

Referring to FIG. 9, a second embodiment of the golf club set according to the present invention is shown with the number 1 iron,
It is represented by a 6 iron and a pitching wedge (PW). Maximum thickness T4A of the lower weight 34b
Decreases from the long iron to the short iron, and as a result, the overall thickness of the lower weight 34b decreases from the long iron to the short iron. The thickness T3 of the upper weight 34a increases from a long iron to a short iron. Therefore, the thicknesses of the lower weight 34b and the upper weight 34a are inversely proportional from the long iron to the short iron. The thicknesses T1 and T2 of the top line 30 increase from the long iron to the short iron. The thicknesses T1 and T2 are equal between each club. By changing the thickness of the cavity weights and top line, the center of gravity increases from long irons to short irons so that the peak locus altitude along a straight line throughout the set is nearly consistent. The center of gravity Cg of the sixth iron defines the reference line R, and the center of gravity Cg of the first iron is below the straight line R, while the center of gravity Cg of the pitching wedge is above the straight line R. When the 1 iron, 6 iron and PW of the set of FIG. 9 are incorporated into the iron set shown in FIG. 5, the center of gravity increases from the long iron to the short iron.

Referring to FIG. 10, a third embodiment of the golf club set according to the present invention is shown in which the first iron, the sixth iron and the pitching wedge (P
W). The maximum thickness T4A of the lower weight 34b decreases from a long iron to a short iron, and as a result, the overall thickness of the lower weight 34b decreases from a long iron to a short iron. The thickness T3 of the upper weight 34a is constant from the long iron to the short iron. Topline thicknesses T1 and T2 increase from long iron to short iron. The thicknesses T1 and T2 are equal between each club. By varying the thickness of the lower weight and top line, the center of gravity has been raised from long irons to short irons so that the peak trajectory altitude along a straight line is nearly consistent throughout the set. 6th iron center of gravity Cg
Defines the reference line R, the center of gravity Cg of the first iron is below R, while the center of gravity Cg of the pitching wedge is above the straight line R. When the 1 iron, 6 iron and PW of the set of FIG. 10 are incorporated into the iron set shown in FIG. 5, the center of gravity rises from long iron to short iron.

Referring to FIG. 11, a fourth embodiment of the golf club set according to the present invention is shown wherein the first iron, sixth iron and pitching wedge (P
W). The maximum thickness T4A of the lower weight 34b is constant from the long iron to the short iron. The thickness T3 of the upper weight 34a increases from a long iron to a short iron. Topline thicknesses T1 and T2 increase from long iron to short iron. The thicknesses T1 and T2 are equal between each club. The thickness T6 of the sole decreases from a long iron to a short iron. By varying the thickness of the top weight, top line and sole, the center of gravity rises from long iron to short iron so that the peak trajectory altitude along a straight line is nearly consistent throughout the set. The center of gravity Cg of the sixth iron defines the reference line R, and the center of gravity Cg of the first iron is below the straight line R, while the center of gravity Cg of the pitching wedge is above the straight line R. When the 1 iron, 6 iron and PW of the set of FIG. 11 are incorporated into the iron set shown in FIG. 5, the center of gravity rises from a long iron to a short iron.

In another embodiment, the set according to the fourth embodiment can be modified such that the thickness of the lower weight decreases from a long iron to a short iron. In yet another embodiment, the set according to the fourth embodiment can be modified such that the thickness of the top weight is kept constant from long iron to short iron.

Referring to FIG. 12, a fifth embodiment of a golf club set according to the present invention is shown wherein the first iron, sixth iron and pitching wedge (PW) are shown.
Is represented by The maximum thickness T4A of the lower weight 34b decreases from a long iron to a short iron, and as a result, the overall thickness of the lower weight 34b decreases from a long iron to a short iron. The thickness T3 of the upper weight 34a is constant from the long iron to the short iron. Thickness T of top line 30
1, T2 increases from long iron to short iron, and thicknesses T1 and T2 are equal between each club. The thickness T6 of the sole decreases from a long iron to a short iron. By varying the thickness of the lower weight, top line and sole, the iron's center of gravity rises from a long iron to a short iron so that the peak trajectory altitude along a straight line is nearly consistent throughout the set. The center of gravity Cg of the 6th iron defines the reference line R and 1
The center of gravity Cg of the iron is below the straight line R, while the center of gravity Cg of the pitching wedge is above the straight line R. 1 iron, 6 iron and PW of the set of FIG.
When incorporated into the iron set shown in FIG. 5, the center of gravity rises from a long iron to a short iron.

In another embodiment, the set of the fifth embodiment is modifiable so that the thickness of the upper weight increases from long iron to short iron.

Referring to FIG. 13, a sixth embodiment of the golf club set according to the present invention is shown wherein the first iron, sixth iron and pitching wedge (P
W). The maximum thickness T4A of the lower wedge 34b decreases from a long iron to a short iron, and consequently decreases from a long iron to a short iron. The thickness T3 of the upper wedge 34a is constant from a long iron to a short iron.
The thicknesses T1 and T2 of the top line are constant from the long iron to the short iron. The thicknesses T1 and T2 are equal between each club. By changing the thickness of the lower weight, the center of gravity rises from a long iron to a short iron so that the peak trajectory altitude along a straight line is nearly consistent throughout the set. 6th iron center of gravity C
g defines the reference line R, the center of gravity Cg of the first iron is below the straight line R, while the center of gravity Cg of the pitching wedge is above the straight line R. The first iron of the set of FIG. 13,
When the 6th iron and PW are incorporated into the iron set shown in FIG. 5, the center of gravity rises from a long iron to a short iron.

In another embodiment, the set of the sixth embodiment can be modified such that the thickness of the sole and / or lower peripheral weight decreases from long irons to short irons. In yet another embodiment, the set of the sixth embodiment is modifiable such that the thickness of the lower weight is constant and the thickness of the upper weight increases from the long iron to the short iron.

Referring to FIG. 14, a seventh embodiment of the golf club set according to the present invention includes a first iron, a sixth iron and a pitching wedge (P
W). The maximum thickness T4A of the lower weight 34b decreases from a long iron to a short iron, and as a result, the overall thickness of the lower weight 34b decreases from a long iron to a short iron. The thickness of the upper weight 34a increases from a T3 long iron to a short iron. Thickness T of top line 30
1, T2 is constant from a long iron to a short iron. By varying the thickness of the lower and upper weights, the center of gravity rises from the long iron to the short iron so that the peak trajectory altitude along a straight line is nearly consistent throughout the set. The center of gravity Cg of the 6th iron defines a straight line R, and the center of gravity Cg of the 1st iron
Is below the straight line R, while the center of gravity Cg of the pitching wedge is above the straight line R. When the 1 iron, 6 iron, and PW of the set of FIG. 14 are incorporated into the iron set shown in FIG. 5, the center of gravity rises from a long iron to a short iron.

In another embodiment, the set of the seventh embodiment can be modified such that the thickness of the sole and / or lower peripheral weight decreases from a long iron to a short iron.

Referring to FIG. 15, an eighth embodiment of the golf club set according to the present invention is shown wherein the first iron, the sixth iron and the pitching wedge (P
W). Maximum thickness T of lower weight
4A decreases from a long iron to a short iron, and consequently, the overall thickness of the lower weight 34b decreases from a long iron to a short iron. The thickness T3 of the upper weight 34a is constant from the long iron to the short iron. Thickness T of top line 30
1, T2 is constant from a long iron to a short iron. Most club heads use the first material M1
And a small amount of the second material M2 replaces the first material M1, which formed the top line of the No. 6 iron and pitching wedge (PW). The first material M1 has a lower density than the second material M2. Second material M
The amount of 2 increases from long irons to short irons. By varying the thickness of the lower weight and increasing the amount of dense second material on the top line from long irons to short irons, the peak trajectory altitude along a straight line is substantially consistent throughout the set. In addition, the center of gravity is the lowest in long irons, rising from long irons to short irons. The center of gravity Cg of the sixth iron defines the reference line R, and the center of gravity Cg of the first iron is below the straight line R, while the center of gravity Cg of the pitching wedge is above the straight line R. Set 1 of FIG.
When the iron No. 6, iron No. 6 and PW are incorporated into the iron set shown in FIG. 5, the center of gravity rises from a long iron to a short iron.

[0035] Recommended first materials M1 include, but are not limited to, titanium, aluminum, stainless steel or metal alloys or composites. The composite material can include a variety of resins combined with the matrix material, such as, for example, a thermoplastic or thermoset resin, or the like combined with glass fibers, graphite, ceramic matrices, and the like. The recommended second material M2 includes, but is not limited to, tungsten, copper, brass, or an alloy thereof. The second material can be applied by flame spraying to a club head formed from the first material.

In another embodiment, the thickness of the sole and / or lower peripheral weight is reduced from a long iron to a short iron, and / or the thickness of the upper weight and top line is reduced from a long iron to a short iron. The set according to the eighth embodiment can be modified to reduce it. In yet another embodiment, the set according to the eighth embodiment can be modified such that the thickness of the lower weight is constant from long iron to short iron. In another embodiment, the set of eighth embodiments can be modified such that the upper weight has a second material and the amount of the second material increases from long irons to short irons. The second material of the upper weight can be used in combination with the second material of the upper portion of the peripheral weight or without the second material of the upper portion.

Referring to FIG. 16, a ninth embodiment of the golf club set according to the present invention is shown in which the illustrated first iron, sixth iron and pitching wedge (P
W). The maximum thickness T4A of the lower weight 34b is constant from the long iron to the short iron. The thickness T3 of the upper weight 34a increases from a long iron to a short iron. The thicknesses T1, T2 of the top line 30 increase from long irons to short irons. Thickness T1 of each club head
And T2 are equal. Most club heads use the first material M
1 and a small amount of the second material M2 replaces the first material forming the lower weight. Thus, the second material does not change the height of the iron. The first material M1 has a lower density than the second material M2.
The amount of the second material M2 decreases from a long iron to a short iron. By changing the thickness of the top weight and top line and adding a dense second material to the bottom weight that decreases in volume from long iron to short iron, the peak trajectory altitude along a straight line throughout the set is reduced. The center of gravity rises from long irons to short irons, almost consistently. The center of gravity Cg of the sixth iron defines the reference line R, and the center of gravity Cg of the first iron is below the straight line R, while the center of gravity Cg of the pitching wedge is above the straight line R. When the 1st iron, 6th iron and PW of the set of FIG. 16 are incorporated into the iron set shown in FIG. 5, the center of gravity rises from a long iron to a short iron.

In another embodiment, the thickness of the sole and / or lower peripheral weight is reduced from long iron to short iron, and / or the thickness of the upper weight and / or top line is reduced from long iron to short iron. The set of the ninth embodiment can be modified to be constant over In yet another embodiment, the set according to the ninth embodiment can be modified such that the thickness of the lower weight decreases from a long iron to a short iron.

Referring to FIG. 17, a tenth embodiment of the golf club set according to the present invention is shown in FIG.
Irons, 6 irons and pitching wedges (PW). The maximum thickness T4A of the lower weight 34b is constant from the long iron to the short iron. The thickness T3 of the upper weight 34a increases from a long iron to a short iron. The thicknesses T1, T2 of the top line 30 increase from long irons to short irons. The thicknesses T1 and T2 in this embodiment are equal. Most club heads are number one
And a small amount of the second material M2
Is added to the sole. The first material M1 is the second material M
Density lower than 2. The amount of the second material M2 decreases from a long iron to a short iron. By varying the thickness of the top weight and top line and adding a dense second material to the sole that decreases in volume from long iron to short iron, the peak trajectory altitude along a straight line throughout the set is approximately The center of gravity rises from a long iron to a short iron consistently. 6
The center of gravity Cg of the iron # 1 defines the reference line R, and the center of gravity Cg of the iron # 1 is below the straight line R, while the center of gravity Cg of the pitching wedge is above the straight line R. When the 1 iron, 6 iron and PW of the set of FIG. 17 are incorporated into the iron set shown in FIG. 5, the center of gravity rises from a long iron to a short iron.

In another embodiment, the thickness of the sole and / or lower peripheral portion is reduced from long iron to short iron, and / or the thickness of the upper weight and / or top line is reduced from long iron to short iron. The set of the tenth embodiment can be modified to be constant over. In yet another embodiment, the set according to the tenth embodiment can be modified such that the thickness of the lower weight decreases from a long iron to a short iron.

Referring to FIGS. 18 and 19, a golf club head 10 'according to another embodiment is shown. Golf club head 10 'is similar to golf club 10 described with reference to FIGS.
0 'has been modified to include two threaded bores 60 and 62 inside lower weight 34b. The threaded bore 60 is adjacent to the heel 12 and the bore 62 is
Close to 4. The threaded bores 60 and 62 receive externally threaded weight screws 64 and 66, respectively. These screws can be glued for a more secure fixation. Most club heads are number one
, And the threaded screw is formed from the second material M2. The first material M1 has a lower density than the second material M2. The first and second materials are:
It can include those described with respect to the embodiment shown in FIGS.

Referring to FIGS. 18-20, a golf club head 10 'is a first embodiment of a golf club set according to the present invention.
It is incorporated into one embodiment. An eleventh set of golf clubs according to the present invention is represented by the illustrated 1 iron, 6 iron and pitching wedge (PW). Maximum thickness T of lower weight 34b
4A is constant. The thickness T3 of the upper weight 34a increases from a long iron to a short iron. The thicknesses T1, T2 of the top line 30 increase from long irons to short irons. The thicknesses T1 and T2 in this embodiment are equal between each club. Most club heads are formed from a first material M1, and weight screws 64 and 66 are formed from a second material M2 and are added to the lower weight. The position of the screw goes up from the long iron to the short iron. By changing the thickness of the upper weight and top line, and moving the weight screw upward from the long iron to the short iron, the center of gravity from the long iron so that the peak locus altitude along the straight line is almost consistent throughout the set. Go up to short iron. The center of gravity Cg of the sixth iron defines the reference line R, and the center of gravity Cg of the first iron is below the straight line R, while the center of gravity Cg of the pitching wedge is above the straight line R. When the 1 iron, 6 iron and PW of the set of FIG. 20 are incorporated into the iron set shown in FIG. 5, the center of gravity rises from a long iron to a short iron.

In another embodiment, the set according to the eleventh embodiment can be modified such that the weight screw is located in the upper weight. In another embodiment,
The eleventh such that the thickness of the sole and / or lower peripheral weight decreases from long iron to short iron and / or the thickness of the upper weight and / or top line is constant from long iron to short iron. Can be modified. In yet another embodiment, the set according to the eleventh embodiment can be modified such that the thickness of the lower weight decreases from a long iron to a short iron.

Referring to FIG. 21, a twelfth embodiment of the golf club set according to the present invention is shown in FIG.
Irons, 6 irons and pitching wedges (PW). The maximum thickness T4A of the lower weight 34b decreases from a long iron to a short iron, and as a result, the overall thickness of the lower weight 34b decreases from a long iron to a short iron.
The thickness T3 of the upper weight 34a increases from a long iron to a short iron. The thicknesses T1 and T2 of the top line 30 are constant from the long iron to the short iron. Further, the first iron and the pitching wedge are substantially formed from the first material, and further include a second material M2 heavier than the first material and a third material M3 lighter than the first material. . In the first iron, the first material M1 is removed and replaced with a heavier material M3 located in the sole 24 and a second lighter material M2 located in the top line 30. In the pitting wedge, the first material M1 is removed and replaced by a heavier material M3 located in the top line 30 and a second lighter material M2 located in the sole 24.
The sixth iron is formed of the first material. By changing the thickness of the lower and upper weights and positioning the heavier and lighter materials at different locations in each club, the center of gravity is adjusted so that the peak trajectory altitude along a straight line is almost consistent throughout the set. Go up from long iron to short iron. 6th iron center of gravity Cg
Defines the reference line R, and the center of gravity Cg of the first iron is a straight line R
Below, while the center of gravity Cg of the pitching wedge is above the straight line R. The first iron in the set of FIG. 21, 6
When the iron and the PW are incorporated into the iron set shown in FIG. 5, the center of gravity rises from a long iron to a short iron. The use of heavier and lighter materials makes it easier to remove the first material as needed and still provide each club head with the required weight.

While it is clear that the exemplary embodiments of the invention disclosed herein satisfy the above objects, those skilled in the art will recognize that many modifications and embodiments are possible. The disclosed club set includes a series of wedges, each with a separate loft, such as pitching, lobs, gaps, and sand wedges.
As noted above, the various disclosed combinations of changing the center of gravity can be used to achieve the goal of increasing the center of gravity from long irons to short irons. The thickness of the top line can be changed by changing only the thickness of the upper top line, or only the thickness of the lower top line, or changing both. Instead of changing the thickness of the lower weight by changing the overall thickness of the cavity weight, only one thickness of the cavity weight is changed.
Parts can be changed. On the other hand, the upper weight
It can be changed by changing the overall thickness of the weight, or by changing only a portion of the thickness. If a first material and a second, denser material are used, these materials may also be brazed or bonded with fasteners such as, for example, epoxy or mechanical pins.

In another modification, the center of gravity can be changed from long irons in the subset to short irons. Thus, for example, a first group of long irons has a first center of gravity, a second group of mid-irons has a second center of gravity, and a group of short irons has a third center of gravity. Although the vertical position of the center of gravity is the same within the group, the first center of gravity is the lowest and the second
And the third center of gravity increases from the first group to the third group. Therefore, it will be understood that the appended claims are intended to cover all such modifications and embodiments that fall within the spirit and scope of the invention.

[Brief description of the drawings]

FIG. 1 is a front view of a golf club head according to the present invention.

FIG. 2 is a rear view of the golf club head of FIG. 1;

FIG. 3 is an enlarged cross-sectional view of the golf club head of FIG. 2 taken along line 3-3.

4 is a toe-end view of the golf club head of FIG. 1;

FIG. 5 is a front view of a golf club set according to the present invention.

FIG. 6 shows a first golf club headset according to the present invention.
It is a sectional view group of an embodiment.

FIG. 7 is a schematic front view of a portion of the golf club headset of FIG. 6;

FIG. 8 is a graph showing ball flight trajectories achieved with various clubs according to the prior art as compared to ball flight trajectories achieved with various clubs according to the present invention from the set shown in FIG.

FIG. 9 is a cross-sectional view of an embodiment of a set of golf club heads according to the present invention.

FIG. 10 is a cross-sectional view of an embodiment of a set of golf club heads according to the present invention.

FIG. 11 is a cross-sectional view of an embodiment of a set of golf club heads according to the present invention.

FIG. 12 is a cross-sectional view of an embodiment of a set of golf club heads according to the present invention.

FIG. 13 is a cross-sectional view of an embodiment of a set of golf club heads according to the present invention.

FIG. 14 is a cross-sectional view of an embodiment of a set of golf club heads according to the present invention.

FIG. 15 is a cross-sectional view of an embodiment of a set of golf club heads according to the present invention.

FIG. 16 is a cross-sectional view of an embodiment of a set of golf club heads according to the present invention.

FIG. 17 is a cross-sectional view of an embodiment of a set of golf club heads according to the present invention.

FIG. 18 is an exploded rear perspective view of another embodiment of a golf club head according to the present invention.

FIG. 19 shows a weight screw in a mounting position,
FIG. 19 is a rear perspective view of the golf club head of FIG. 18.

FIG. 20 is a cross-sectional view of a set of golf club heads having a configuration similar to the head of FIG. 9, taken along line 20-20 of FIG.

FIG. 21 is a cross-sectional view of another embodiment of a set of golf club heads according to the present invention.

 ──────────────────────────────────────────────────の Continuation of front page (72) Inventor Terir R. McCave USA, CA 92009, Carlsbad, Avenida de Palais, 7469 (72) Inventor Mike S. Bujdos United States, CA 92056, Oceanside, Troway, 4984 F-term (reference) 2C002 AA03 CH04 SS04

Claims (25)

[Claims] 1. A set of golf club heads including at least a first club head and a second club head, wherein the first club head has a first loft angle and a first
, The second club head includes a second loft angle and a second center of gravity, the first loft angle is less than the second loft angle, and the first and second golf club heads include , Toe, upper surface, lower surface, front face,
The improved set of golf club heads further includes a back face opposite the front face and a cavity including a cavity weight, wherein the first center of gravity is located at a first height and the second center of gravity is a second center of gravity. 2 including a first club head cavity weight having a weight distribution different from the second club head cavity weight such that the first height is lower than the second height. Golf club head set. 2. The golf club head set according to claim 1, wherein the cavity weight further comprises an upper weight located closer to the upper surface than to the lower surface. 3. The golf club head set of claim 2, wherein each cavity weight further comprises a lower weight disposed between the upper weight and the lower surface. 4. The back face of each club head further includes a peripheral weight for defining a cavity therein, the peripheral weight further includes an upper portion and a lower portion, and for each club, an upper weight. 4. The set of golf club heads according to claim 3, wherein the elongate extends from the upper portion of the peripheral weight toward the gap and the lower weight extends from the lower portion of the peripheral weight toward the gap. 5. The lower weight of the first club head is the same weight as the lower weight of the second club head, and the upper portion of the peripheral weight of the first club head is
5. The set of golf club heads according to claim 4, wherein the set of golf club heads is lighter than a top portion of a peripheral weight of the second club head. 6. The set of golf club heads according to claim 5, wherein the upper weight extends less from the back face on the first club than on the second club. 7. The set of golf club heads according to claim 6, wherein the upper portion of the peripheral weight extends less from the back face on the first club than on the second club. 8. The set of golf club heads according to claim 7, wherein each cavity weight extends across a cavity from the heel to the toe. 9. The set of golf club heads according to claim 7, further comprising at least four club heads. 10. An iron, a first iron, a second iron, a third iron, a fourth iron, a fifth iron, a sixth iron,
The golf club head set of claim 7, further comprising a 7 iron, an 8 iron, a 9 iron and a pitching wedge. 11. The set of golf club heads according to claim 9, wherein the rate of change of the center of gravity between each club is constant. 12. The first club head further includes a first shaft connected to the first club head having a first length, and wherein the second club head has a second shaft having a second length. The golf club head set of claim 1, comprising a second shaft connected to the first club head, wherein the first length is greater than the second length. 13. A set of golf clubs including at least a first golf club and a second golf club, wherein the first golf club has a first shaft having a first shaft length, and a first loft angle. And a first golf club head having a first center of gravity, a second golf club having a second shaft length, the second golf club having a second shaft length;
A second golf club head having a second loft angle and a second center of gravity, wherein the first length is greater than the second length, the first loft angle is less than the second loft angle, The first and second golf club heads further include a cavity including a heel, a toe, an upper surface, a lower surface, a front face, a back face opposite the front face, and a cavity weight having at least one lower weight; The improved set of golf clubs, wherein the lower weight is located closer to the lower surface than the upper surface, further comprises a first center of gravity located at a first height and a second center of gravity located at a second height. , A first lighter than the lower weight of the second club head such that the first height is lower than the second height.
Golf club set, including the lower weight of the club head. 14. The golf club set according to claim 13, wherein each cavity further includes an upper weight disposed between the lower weight and the upper surface. 15. The upper weight of the first club head is lighter than the upper weight of the second club head.
4. The golf club set according to 4. 16. A lower weight is provided from the back face,
The degree of extension is higher on the first club than on the second club, and the degree of extension of the upper weight from the back face is lower on the first club than on the second club. The golf club set according to claim 14. 17. The back face of each club head,
Further including a peripheral weight defining a cavity therein, wherein the peripheral weight further includes an upper portion and a lower portion;
The golf club set according to claim 15, wherein the upper weight extends from the upper portion of the peripheral weight toward the gap, and the lower weight extends from the lower portion of the peripheral weight toward the gap. 18. At least a first golf club and a second golf club
A golf club set including a golf club of
Golf club having a first shaft length and a first shaft having a first loft angle and a first center of gravity.
Wherein the second golf club includes a second shaft having a second shaft length, and a second golf club head having a second loft angle and a second center of gravity. The first length is greater than the second length, the first loft angle is less than the second loft angle, and the first and second
The golf club head further includes a heel, a toe, a front face, a back face opposite to the front face, and a peripheral weight defining a cavity,
The improved set of golf clubs, wherein the peripheral weight includes an upper portion and a lower portion, further comprising: a first center of gravity located at a first height; a second center of gravity located at a second height; A golf club set including a first peripheral weight that is lighter than a second peripheral weight, such that the height of the first peripheral weight is lower than the second height. 19. At least a first golf club and a second golf club
A golf club set including a golf club of
Golf club having a first shaft length and a first shaft having a first loft angle and a first center of gravity.
Wherein the second golf club includes a second shaft having a second shaft length, and a second golf club head having a second loft angle and a second center of gravity. The first length is greater than the second length, the first loft angle is less than the second loft angle, and the first and second
The golf club head further includes a heel, a toe, a front face, a back face opposite to the front face, and a peripheral weight defining a cavity,
The improved set of golf clubs further includes a cavity set having a cavity weight therein, the cavity weight including a lower weight and an upper weight extending from the back face to form a gap therebetween, the golf club head further comprising: A second material formed from the first material and having each golf club head bonded thereto, wherein the second material is denser than the first material and the first club head is formed of a second material. The first club head has a first amount and the second club head has a second amount of the second material, the first center of gravity is located at the first height and the second center of gravity is at the second height. And a golf club set including each golf club head, wherein the first amount and the second amount are different such that the first height is lower than the second height. 20. The peripheral weight of each club head further includes a top portion, wherein a second material is on the top portion, wherein a first amount of the second material is less than a second amount of the second material. 20. The golf club set according to claim 19. 21. A method according to claim 21, wherein the second material is on the upper portion,
A first amount of the second material is less than a second amount of the second material;
The golf club set according to claim 19. 22. A method according to claim 21, wherein the second material is on the lower portion and the first material is
20. The golf club set of claim 19, wherein the amount of the second material is greater than the second amount of the second material. 23. Each golf club further includes an upper surface and a lower surface, wherein the second material is on the lower surface and the first amount of the second material is greater than the second amount of the second material. 20. The golf club set according to claim 19. 24. The golf club set according to claim 19, wherein the second material is flame sprayed on the first material. 25. A golf club head including an upper surface and a lower surface, wherein the club head has a loft angle, a heel,
The club head further includes a toe, a front face, and a back face opposite the front face, wherein the club head further includes a peripheral weight defining a cavity, the peripheral weight having an upper portion and a lower portion, wherein the cavity has at least two cavities therein. One cavity weight, the cavity weight includes an upper weight and a lower weight,
The upper and lower weights extend from the back face,
A golf club wherein an upper weight extends from the upper portion of the peripheral weight toward the gap, a lower weight extends from the gap toward the lower portion of the peripheral weight, and the upper and lower weights extend from the heel to the toe over the entire cavity. head.