JPH09308717A - Golf club with adjustable weight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the weight of a golf club at every round or for every golf player by providing a weight mounting means within a club head so as to be positioned for keeping the three-dimensional alignment of the center of the means toward the center of gravity of the club head. SOLUTION: Weight spaces or weight ports 1 and 2 are formed on the front toe zone 20 of a club head 4, and the rear heel zone 19b thereof. Also, the weight spaces or weight ports 1 and 2 are set so as to keep three-dimensional alignment with the center of the gravity 3 of a club. In other words, the weight spaces or weight ports 1 and 2 are aligned with the center of gravity 3 of the club along an axial direction. At the same time, the ports 1 and 2 are as well aligned with the center of gravity 3 within a vertical plane. In addition, the weight spaces or weight ports 1 and 2 are arranged at equal intervals from an imaginary center line passing the center of gravity 3, and form an isosceles triangle with the center of gravity 3. According to this construction, a weight can be adjusted three-dimensionally and the adaptability thereof can be enhanced.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to golf equipment, and more particularly to golf clubs, and more particularly, it is more difficult for golfers to normally contact the ball at the center at all times due to extra length and low loft. It is related to stillwood golf clubs.

[0002]

In response to the opinion that the current level of golf engineering makes golf sports too difficult, experienced golfers are experienced.
And amateur golfers who play from time to time will probably agree as well. The game of golf needs to be made easier, for both the average player with a score over 105 strokes, and for all golfers under 2% who can always break 80. The difficulty of golf is inherent in the complexity of the game itself, in part, but unforgivable in that it is not specifically designed for individual muscle strength and swinging tendency. This is because the golfer cannot master the club.

Even custom-made (custom-made) golf clubs for individual players, once assembled, are inflexible. You can't adjust the weight of the club head, the trajectory of the shot, the side spin, or the reduction of it as the golfer grows older and better. The present invention solves this problem. Moreover, the clubs can be adjusted on a round-by-round or golfer-by-rounder basis, even for custom made ones, because there is some adjustment of weight placement means within the individual clubs. The present invention solves all the above-mentioned problems and significantly improves the prior art.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to an improved golf club in which the club head is provided with adjustable weight means. These adjustable weight means
Allows individual golfers to change the center of gravity of the club head. More specifically, the adjustable weight means of the present invention allows for three-dimensional adjustment of the center of gravity as compared to conventional weights which provided only limited adjustment in one or two dimensions. Is.

By providing a means by which the center of gravity can be adjusted, the effect of torque resulting from the golfer hitting the ball at points other than the center of gravity is minimized, thereby causing an off-center shot. However, the golfer can effectively tailor or design a club that provides a more reliable feel, reduces bowing of the flying ball, and reduces loss of flight distance. As a result, improved swing and better bounce
You get a contact with Le and a more accurate shot.

The "sweat spot" (on the club face or striking surface) of a golf club can be defined as the point of maximum energy conversion during the impact of the club head with the ball. This is usually the point where a line perpendicular to the club face that passes through the center of gravity intersects the club face. If the ball hit on the club face is only about 0.25 inches away from the sweep spot, the shot usually has a flight distance of 10
12 yard shorter and bad side spin is given to the ball.

[0007]

Comparison of the Prior Art with the Invention As noted above, general efforts to alter the center of gravity of a golf club head are known in the art. For example, Wetlaufer U.S. Pat. No. 2,056,336 and Johnston U.S. Pat. No. 3,053.
See No. 9,976. However, even in the closest prior art, the ability to expand inertial moments was limited to two dimensions.

For example, both are Thunder US Pat.
In 050,879 and 5,013,041, the inventors have designed the club head such that the center of gravity can move horizontally and horizontally and vertically along the front of the club near the club face. However, the distance between the weight and the center of gravity of the club head cannot exceed 1 inch. The present invention allows the weights to be located at least 1.2 inches apart, thereby allowing a larger sweep spot than the prior art size. Similarly, in Siam U.S. Pat. No. 4,869,507, inertial moments can be expanded laterally and horizontally, but not vertically.

In addition, none of the prior art weight adjustable clubs have their weights axially aligned, ie, co-located, toward the center of gravity of the club.
Doing this tends to result in clubs that tend to produce unbalanced wobble movements during the swing,
It tends to lead to strokes that tend to produce inconsistent errors. The present invention, conversely, positions the weights in three-dimensional axial alignment toward the natural center of gravity of the club.

In addition, in prior art clubs, the weights and weight ports (weight chambers) were often made to pass through the perimeter of the club head to form a depression in the club cavity. For example, FIG. 11 of Siam, U.S. Pat.
See also FIG. Here, the weight port is recessed into the club head by at least 3/4 of an inch (1.9 cm). Locating the weights in the club cavity in this manner further reduces the expansion of inertial moments or switch spots. This also weakens the club's wall strength, and its robustness. In contrast to this, the present invention provides a weight port on the outer perimeter of the club head.

Finally, none of the prior art clubs provide weights within their individual weights with variable weight surfaces or portions. This variable "weight addition adjustment within weight" provides greater and three-dimensional adjustability over the prior art.

The present invention provides a golf club, particularly a wood club, containing a three-dimensionally adjustable weight addition system. The weight addition system includes a plurality of weight ports or weight chambers, and the weights themselves, the weight ports or weight chambers being located outside the club head, and preferably in the individual club tows ( Located near the toe side and the heel side.

The weights are positioned axially aligned towards the normal center of gravity of the club head and generally form an equilateral triangle with the normal center of gravity of the club head. Preferably, the weight is a two-sided weight, and the individual weights on each side of the overall weight are the same or different than the weights on the other side of the overall weight. In the preferred embodiment, the weights, or more specifically, the weights of the individual sides of the two-sided weight, are composed of materials of various densities and are easily replaceable to make the club heavier or lighter. The weight can be changed with respect to the center of gravity.

This weight addition system, and in particular the addition of two-sided weights of individual weights, makes it very easy to adjust the center of gravity of the club head in the vertical, horizontal, and vertical directions, thereby allowing the individual to play the club. It is possible to customize (customize). This reduces the golfer's chance of causing errors on the golf shot, such as ball hooking or slicing. It also allows the club to have the potential for greater inertial moment expansion, as well as the ability to lower or raise the center of gravity of the club for customized shot trajectory. And

The weight chamber or weight port is preferably such that the center of each port, and thus the center of each weight, is aligned with the center of gravity of the club, that is, the upper half of the weight is above the center of gravity and the lower half. It is preferably aligned in the club so that it is below the center of gravity. This gives maximum stability during the swing of the club, while maximizing the potential for trajectory changes.

In the preferred embodiment, the club head of the present invention comprises four sets of the same double-sided weight. These preferred weights consist of upper and lower halves of different materials that are fused together to form a solid weight. One set of weights contains lighter weight material in both halves. The second set of weights consists of having heavier material in both halves. The third set of weights, on the other hand, contains lighter material in one half and heavy material in the other half. The fourth set of weights consists of having one half of the lightweight material and the other half of the medium weight material compared to the lightweight and heavy materials.

The exact weight of each individual weight can be varied to accommodate different sizes and weights of driver and fairway wood. The preferred embodiment described above allows, for example, 64 different weight placement combinations. The type of weights and their placement can significantly change the nature of the club and the resulting shot. By installing a heavier weight in the toe weight port and a lighter weight in the heel weight port, spin in the hook system of the shot will be reduced or eliminated. Attach a heavier weight port in the heel weight port, and attach the toe weight port.
Spinners in the slice system could be reduced or eliminated by installing lighter weights in the slot. Hee
By attaching intermediate or heavy weights to both the ruler and toe weight ports, the expansion of the inertia moment will be maximized for each mass.

By mounting the lightest weights in both weight ports, the weight of the club is significantly reduced, allowing increased club head speed and longer flight distances. By attaching the heavier weight halves to the lower weight port (s), the center of gravity is lowered resulting in a higher trajectory shot. By attaching the lighter weight halves to the lower weight port (s), the center of gravity is raised resulting in a lower ballistic shot. The combination of these weights and the possibility of their placement allows for three-dimensional customization of the club and can be adapted to individual needs.

Furthermore, by positioning the weight port in a horizontal plane passing through the center of gravity of the club head, the principal axis of inertia in the vertical direction can be greatly improved. Nowhere in the prior art is it disclosed that such weight port positioning has a synergistic effect with the main axis of the club head.

The club itself can be made of any conventional material used in making golf clubs. In a preferred embodiment, the club head is made of metal or wood,
More preferably, it consists of metal. The metal head can be made of any of several metals or alloys.

Weights are consistent with the types of materials commonly used in golf club construction and, as long as they can withstand the rigors of normal use, weights. , Can be made from a wide range of materials. Weights include metals, alloys, composites such as ceramics, graphite, polymers, and plastics such as Kevlar.
And the like. In preferred embodiments, the weights include, but are not limited to, aluminum, copper,
It consists of stainless steel and metals with various densities, including lead.

In order to fully explain and gain recognition of the advantages of the present invention, especially over the prior art, the following calculations can be applied. This calculation can be used to derive a number that represents the expansion of the center of gravity, or the expansion of the sweep spot, using the adjustable weight addition system of the present invention.

The formula changes the center of gravity (DerutaCG) = (Distance from mass × CG plus) / (total mass) invention DerutaCG = {added mass (30 g) × distance (2.2 ")} / {total weight ( = 215g)} = 0.307 "∴Change or expansion of CG = 0.307" Prior art (US Pat. No. 4,869,507, sham) ΔCG = {added mass (30g) × distance (1.55 ")} / {total mass ( = 215g)} = 0.211 "∴ Change or expansion of CG = 0.211"

Using this calculation, the present invention produces a centroid enlargement that is approximately 32% greater than the prior art. This results in an improved ability to add or reduce side spin to the ball resulting from off-center hits, roughly equivalent to that value, as well as improved flight distance.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, weight chambers or weight ports 1, 2 are shown positioned in the front toe area 20 and rear heel area 19 of the club head 4. The weight chamber is axially aligned (aligned) with the center of gravity 3 of the club (5) (the axis of the weight chamber faces the center of gravity 3). As shown in FIG. 2, the weight port and the center of the weight are vertically aligned with each other.
Are aligned towards (5).

In FIG. 3, the centers of the weights 1 and 2 are
It is axially aligned with the center of gravity 3 of the club head in a vertical plane (5). As shown in FIG. 4, the centers of the weights 1 and 2 are axially aligned toward the center of gravity 3 of the club (5). These weights are equally spaced from the imaginary centerline 21 and form an isosceles triangle with the center of gravity of the club.

As shown in FIG. 5, the weight 16 itself comprises two substantially equal sized weight halves, preferably fused together. These can be of similar or different densities and can rotate up and down within weight ports 1 and 2. 5a and 6
As further shown in a, the weight preferably has a notch on one side 17, which notch fits into any one of the weight ports 7,
Facilitates improved fixation of weights within the weight port. The weight can be fixed in the weight port 7 by any conventional means, preferably by means of a screw device 6. The weights can also be fixed more permanently by the use of epoxies or other adhesives, which limits the ability of the weights to adjust after they are fixed.

FIG. 7 shows another embodiment of the same club head 4, where another embodiment of the weight is shown. These other weights 8 and weight chambers or weight ports 18 are also aligned straight with the center of gravity 3 of the club (5).

FIG. 8 illustrates another weight means consisting of round hemispheres of similar size. The weight 8 itself has screw means attached to the bottom of each individual weight 8a for screwing into the weight port.

FIG. 9 illustrates what this alternative weight 8 looks like when it is attached to the outer perimeter 4 of the club via another weight chamber or weight port 18. These are aligned so that one half of the weight is preferably above the center of gravity 3 of the club and the other half is below.

FIG. 10 shows how the center of gravity of the club is enlarged using the weight system of the present invention. In FIG. 10, the center of gravity is enlarged toward the tow weight 2 of the club (10). This configuration reduces or eliminates the spin of any hook system to the ball. FIG.
Club's center of gravity toward the club's heel weight 1 3
Is expanded (11). This form
Helps reduce or eliminate spin in any slice system on the ball. FIG. 12 shows that the center of gravity 3 of the club expands in the direction of both the toe weight 2 and the heel weight 1 (12). This configuration will provide maximum expansion of the sweep spot for certainty and distance, with the least amount of bend for the ball when hit off center.

FIG. 13 shows that the center of gravity of the club is (13) enlarged toward the toe weight 2 and the heel weight 1 and vertically upward. This is because the heavier weight is in the upper half of the weight above the center of gravity 3 of the club. This configuration results in a lower shot trajectory due to the excellent expansion of the center of gravity for off-center hits, as well as the increased center of gravity of the club.

FIG. 14 shows that the center of gravity of the club is enlarged (14) toward the toe side weight 2 and the heel side weight 1 and vertically downward. This is because the heavier weight is in the lower half of the weight port below the center of gravity 3 of the club. This form has an excellent expansion of the center of gravity against off-center hits,
Also, the lower center of gravity of the club results in a higher shot trajectory.

FIG. 15 shows that the center of gravity 3 of the club expands toward the weight 2 on the toe side and the weight 1 on the heel side of the club (15). This configuration provides the least amount of center of gravity enlargement, but makes the club head much lighter and allows the golfer to maximize the club head speed for better flight distance.

FIG. 16 illustrates a continuous elliptical shape overlaid with a club face. This pattern
Will occur at club head speeds of 95-100 mph. The lines of the graph are approximately 0.25 inch apart, so each 0.25 inch off-center impact results in a loss of approximately 10-12 yard.

FIG. 17 shows 95 to 100 mph (95 / hour).
FIG. 6 is a vertical diagram illustrating the distance a ball travels in a center and off center hit at ~ 100 miles). As can be seen, there is a loss of 10 yardes for each successive ellipse.

FIG. 18 illustrates another specific example of the club head 4. The weights 19 and 20 are on the inclined plane connecting 5, 5A and 23, and the weights 19 and 20 are
Are aligned with the center of gravity 3 of the club.
The weight 19 of the heel is the vertical center of gravity plane 22 of the club.
Will be located above. This raises the center of gravity of the club in the direction of the heel (24), which results in a lower trajectory for the ball hit from the heel side of the club face. The toe weight 20 lies below the vertical center of gravity plane 22 of the club. This lowers the center of gravity of the club in the toe direction (25), which results in a higher trajectory for ball hits from the toe side of the club face.

FIG. 19 shows another specific example of the tightening means for the weight. Shown specifically is a cylindrical weight with a threaded surface, which allows the weight itself to be clamped directly into the weight port by means of a screw. The weights can be of various lengths 23, 24 and of various densities to facilitate the adjustments described elsewhere herein.

FIG. 20 shows a specific example 24 of another weight port.
Is illustrated. In this embodiment, the weights 23 are mounted in the weight port by screwing until they are flat with the club head 4.

FIG. 21 illustrates how, when using the present invention, the center of gravity of the club head is enlarged on the inclined plane 27 towards the added weight. This lowers the trajectory of the ball struck past the club face's heel 24, which is a situation that normally results in an abnormally high ball trajectory, and also the ball. Helps to increase the trajectory of a ball struck above the toe 25 of the club face, a situation that normally results in an abnormally low trajectory.

Many variations and modifications, all within the scope of the invention, will be readily apparent to those of ordinary skill in the art. All such modifications and variations are considered to be within the scope of the invention. Therefore, the foregoing detailed description is merely one aspect of the present invention that can be used to demonstrate the principles of the present invention, and the present invention is not limited thereto. The scope of the invention is determined only by the claims included herein.

[Brief description of drawings]

FIG. 1 is an internal plan view of a cut club head.

FIG. 2 is an internal side view of a cut club head.

FIG. 3 is a side view of the weight port on the same longitudinal and vertical plane as the center of gravity.

FIG. 4 is a plan view of a weight port and a center of gravity forming an equilateral triangle.

FIG. 5 is a plan view of individual weight means.

FIG. 5a is a side view of individual weight means.

FIG. 6 is a side view of the weight port.

FIG. 6a is a plan view of a weight port.

FIG. 7 is a plan view of a cross section of a club head having another weight means attached thereto.

FIG. 8 is a side view of another weight means.

FIG. 9 is a side view of another weight port shape.

FIG. 10 is a sectional view of a club head as seen from the club head surface, showing various weight positions.

FIG. 11 is a club head sectional view seen from the club head surface, showing various weight positions.

FIG. 12 is a club head sectional view seen from the club head surface, showing various weight positions.

FIG. 13 is a sectional view of a club head as seen from the club head surface, showing various weight positions.

FIG. 14 is a club head cross-sectional view as seen from the club head surface, showing the positions of various weights.

FIG. 15 is a sectional view of a club head as seen from the club head surface, showing various weight positions.

FIG. 16 is a graph of a cross-sectional view of the club face showing the impact ring.

FIG. 17 is a diagram showing a vertical scale of loss of flight distance caused by an off-center impact on a club face.

FIG. 18 is a rear view of the club head showing another weight port means.

FIG. 19 is a side view of another weight means.

FIG. 20 is a side cross-sectional view of a club head portion showing another weight means configuration.

FIG. 21 is a club fader showing another weight means position.
FIG. 3 is a cross-sectional view of the club head viewed from the front of the shoe.

Claims (17)

[Claims] 1. A weight setting means is provided in the club head, and the weight setting means is such that the center of the weight setting means is three-dimensionally aligned toward the center of gravity of the club head. A golf club head characterized by being located inside. 2. The weight setting means comprises one or more two-sided weights, and the individual weights on each side of the two-sided weights are the same as or different from the weights on the other side of the two-sided weights. The golf club head according to claim 1, wherein: 3. The golf club head according to claim 2, wherein each surface of the two-sided weight is different from the other surface of the two-sided weight. 4. The two-sided weight is shaped to allow for center-of-gravity alignment of the two-sided weight within the club head, and thereby within the club head. The golf club head of claim 2, which facilitates adjusting the overall weight distribution. 5. The two-sided weights are aligned such that the heavier weight is above the center of gravity of the club head and produces a lower than normal trajectory for a ball struck by the club. 4. The golf club head according to item 4. 6. The two-sided weights are aligned such that the heavier weight is below the center of gravity of the club head and produces a higher than normal trajectory for a ball struck by the club. 4. The golf club head according to item 4. 7. The golf club head according to claim 4, wherein the weight setting means is maintained in a weight chamber formed in the main body of the club head, and is held at a predetermined position in the weight chamber by fixing means. . 8. The golf club head according to claim 4, wherein the weight setting means maintains the weight on the outer surface of the main body of the club head, and the weight is maintained at a predetermined position in the weight chamber by the fixing means. 9. The golf club head of claim 7, wherein the securing means extends through the center of the two-sided weight and is aligned with the center of gravity of the club head. 10. The fixing means is a screw means.
A golf club having the club head according to 1. 11. A golf club having a club head according to claim 4, wherein the two-sided weight has a substantially rectangular cross section. 12. A golf club having a club head according to claim 8, wherein the two-sided weight has a substantially circular cross section. 13. A golf club having a club head according to claim 3, wherein each surface of the two-sided weight is made of materials having different densities. 14. Each side of the two-sided weight has a metal, an alloy,
13. The golf club of claim 12, wherein the golf club is comprised of a material independently selected from composites, graphite, polymers, plastics, ceramics, or Kevlar, or combinations thereof. 15. The material according to claim 1, which is a metal or an alloy.
The golf club according to item 3. 16. The club head includes a plurality of weight setting means, at least one of the weight setting means being positioned toward a toe end of the club head, and at least one of the weight setting means. A golf club having a club head according to claim 1, wherein the golf head is positioned toward a heel end of the club head. 17. The tow end side weight setting means is positioned below the center of gravity of the club head, and the heel end side weight setting means is positioned above the center of gravity of the club head. 16. The golf club according to 16.