Patent Application
20240082663
The present invention relates to a golf club irons with an improved sole portion, and, more specifically, a golf club iron having a slot adjacent to the striking face of the iron.
The flight characteristics of a golf ball after being struck by a golf club are dependent not only on the swing of the golf club but also on the golf club itself. For example, flight characteristics of the golf ball, such as fades, draws, launch angles, ball spin, speed, and the like, are impacted by the design of the golf club. By adjusting one or more design properties of the golf club, the flight characteristics of the golf ball can be improved, thereby increasing golf club performance. In some examples, adjusting a center of gravity (CG) and/or a moment of inertia (MOI) of a head of the golf club through selective weight placement impacts the flight characteristics of the golf ball. However, these weights need to be both strategically placed relative to the striking face, and properly designed. As such, improvements to weight inserts for golf club irons are desired.
Although weight inserts are crucial in helping improve the CG and MOI of the golf club head, another way to further improve the performance of a golf club head is by increasing the compliance of the golf club head upon impact with a golf ball. U.S. Pat. No. 8,986,133 to Bennett et al. illustrates how compliance can improve the performance of a metalwood type golf club.
U.S. Pat. No. 9,044,653 to Wahl illustrates the addition of a slot in an iron to improve the compliance of the golf club head, but fails to maximize the performance capabilities of such a slot by optimizing its placement as well as adding fillers.
In an aspect, the technology relates to an iron-type golf club head including: a striking face having a lower leading edge; an upper topline edge opposite to the lower leading edge; a sole extending from the lower leading edge to a trailing edge rearward and distal to the lower leading edge; a back portion positioned rearward of the striking face and between the trailing edge and the upper topline edge; a slot formed in the sole adjacent to the striking face; and a weight insert disposed within the slot.
The slot has a front edge defined at the bottom surface of the sole adjacent to the striking face; a back edge defined at the bottom surface of the sole opposite the front edge towards the back portion; a proximal edge adjacent to a heel side of the golf club head; and a distal edge adjacent to the toe side of the golf club head. One or more sidewalls extend upwardly from the slot edges to further define the slot configuration. An insert can be placed inside the slot to add weight to the face portion of the golf club head in an attempt to move the center of gravity forward and/or downward relative to the same golf club head without the insert.
The slot can have various lengths and widths, and can be positioned at various distances from the striking face. Although specified in more detail below and in the accompanying drawings, in general, the slot generally has an elongated configuration in which the length is measured from the proximal edge to the distal edge in the direction of the heel to toe of the golf club. The width of the slot is smaller than the length and is generally measured from the front edge to the back edge in the front to back direction. The height of the slot is generally measured from the sole in the upward direction toward the topline edge.
In general, the slot can have a length of about 20 mm to about 85 mm. The slot can have a width of about 1 mm to about 13 mm. In an example of the present invention, the slot is maintained within the region of the striking face (in the x-direction). In another example of the present invention, the slot can enter into the toe portion of the golf club head. In another example of the present invention, the slot can extend upwardly into the toe portion of the golf club head. In another example, the slot can extend upwardly into the toe portion and curve rearwardly toward the back portion of the golf club head.
The slot is also characterized by its distance from the striking face, and more specifically, the distance from the front edge of the slot to an inner wall of the striking surface. The distance of the front edge of the slot to the inner wall of the striking face is generally 8 mm or less.
The insert is generally configured to fit inside the slot. As such, the length, width and bottom profile of the insert is substantially the same as that of the slot. The height of the insert, however, is not necessarily constrained by the profile or outline of the slot at the sole. In one example of the present invention, the height of the insert as measured from the bottom of the insert to the top of the insert can be uniform. In general, the height of the insert is less than about 5 mm. Preferably, the height of the insert is about 1 mm to about 4.5 mm.
In another example of the present invention, the insert defines a non-uniform height, meaning that the insert has a different height at different locations along the insert. For example, the insert can have a first height at a central portion that is less than a second height of the insert at an end portion. In another example, the central portion of the insert can be recessed relative to a perimeter rim portion of the insert causing a height at the perimeter rim to be greater than a height measured at the recessed central portion.
It is believed the position and configuration of the insert improves the ball speed, including when the ball is hit off-center, increases distance with increased backspin, and increases the coefficient of restitution compared with similar golf club heads without the insert described herein. This configuration may also provide a weaker loft and better peak height. Providing an insert in the slot at the location disclosed adds mass to promote deflection in the slot.
Embodiments of the presently disclosed technology may include golf club heads. In accordance with some aspects of the presently disclosed technology, a golf club head may include a body. The body may include an interior cavity, a face, and a sole. The sole may include a leading edge, a leading edge slot, a central region, and a trailing edge. The leading edge may be defined as a boundary between the face and the sole. The leading edge slot may be rearward of the face. The leading edge slot may be located immediately rearward of the leading edge. The central region may be rearward of the leading edge slot. The trailing edge may be rearward of the central region. The golf club head may include a leading edge insert to fit into the leading edge slot. The leading edge insert may be a different material than the body. The leading edge insert may include an insert body forming a part of the sole in an installed position, and an insert channel. The insert channel may be oriented toward the interior cavity of the body.
In embodiments, a slot width of the leading edge slot may be greater than a slot depth of the leading edge slot.
In embodiments, the insert body may include a face portion to engage a rear surface of the face.
In embodiments, the leading edge insert may include a rib extending from an interior surface of the insert body to the face portion.
In embodiments, the installed position may be defined by fully inserting the leading edge insert into the leading edge slot.
In embodiments, in the installed position, an exterior surface of the leading edge insert may be flush with surrounding regions of the sole.
In embodiments, the leading edge slot may include a rear slot wall extending vertically upward from the sole. The leading edge insert may include a retaining component to help secure the leading edge insert to the leading edge slot.
In accordance with some aspects of the presently disclosed technology, a golf club head may include a body. The body may include a face and a sole. The sole may include a leading edge, a leading edge slot, a central region, and a trailing edge. The leading edge may be defined as a boundary between the face and the sole. The leading edge slot may be rearward of the face. The central region may be rearward of the leading edge slot. The trailing edge may be rearward of the central region. The golf club head may include a leading edge insert to fit into the leading edge slot. The leading edge insert may include an insert body forming a part of the sole in an installed position, and an insert channel. The insert channel may be oriented toward an interior cavity of the body.
In embodiments, the leading edge slot may be within 1.0 mm of the face.
In embodiments, an insert width of the leading edge insert may be greater than an insert depth of the leading edge insert.
In embodiments, the leading edge slot may include a rear slot wall extending upward into the interior cavity of the body. The insert body may include a retaining component to secure the insert body to the rear slot wall into the installed position.
In embodiments, the installed position may be defined by fully inserting the leading edge insert into the leading edge slot.
In embodiments, in the installed position, an exterior surface of the leading edge insert may be flush with surrounding regions of the sole.
In embodiments, the leading edge insert may further include a rear portion. The insert body may include a first material. The rear portion may include a second material different from the first material.
In accordance with some aspects of the presently disclosed technology, a golf club head may include a body. The body may include a face, and a sole. The sole may include a leading edge slot. The golf club head may include a leading edge insert to fit into the leading edge slot. The leading edge insert may include an insert body, a central layer, and a top layer. The insert body may include a first material. A bottom of the insert body may form a part of the sole in an installed position. The central layer may include a second material different from the first material. The central layer may be positioned above the insert body. The top layer may include the first material. The top layer may be positioned above the central layer.
In embodiments, the first material may include a polymer. The second material may include a metal.
In embodiments, the insert body may include first supporting members. The central layer may include second supporting members. The top layer may include third supporting members. The first supporting members, the second supporting members, and the third supporting members may include a first material.
In embodiments, the leading edge insert may further include an insert channel oriented toward an interior cavity of the body.
In embodiments, the leading edge slot may be located immediately rearward of the leading edge.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
These and other features of the presently disclosed technology, as well as the methods of operation and functions of the related elements of structure and the combination of parts, may be clearer upon consideration of the following detailed description and the claims with reference to these drawings, all of which form a part of this specification, with like reference numerals designating corresponding parts in the various figures. It is to be expressly understood that these drawings are for illustration purposes and description and are not intended to be limiting. It should be noted that for clarity and ease of illustration these drawings are not necessarily made to scale. As used in the specification and in the claims, the singular form of “a”, “an”, and “the” may include plural referents unless the context clearly dictates otherwise.
In embodiments, the detailed description set forth below in connection with the appended drawings is intended as a description of presently-preferred embodiments of the invention and is not intended to represent the only forms in which the present invention may be constructed or utilized. The description sets forth the functions and the sequence of steps for constructing and operating the invention in connection with the illustrated embodiments. It is to be understood, however, that the same or equivalent functions and sequences may be accomplished by different embodiments that are also intended to be encompassed within the spirit and scope of the invention. Furthermore, various inventive features are described below and each can be used independently of one another or in combination with other features.
With reference to
For ease of description, the striking face portion 112 will be referred to as the front side of the golf club head 100. As such, the striking face portion 112 is located at a frontal portion of the golf club head 100. As a result, the back portion 114 is located behind the striking face portion 112; the topline 104 is located at an upper portion of the golf club head 100; the heel portion 108 is located at a proximal end of the golf club head 100; the toe portion 106 is located at a distal end of the golf club head 100 opposite the heel portion 108; and the sole 102 is located at a lower portion of the golf club head 100 opposite the topline 104. An axis of origin 12 is provided (for reference only for ease and clarity of description) indicating the x-y-z direction relative to the golf club head 100 in the examples provided.
The golf club head 100 comprises a leading edge 120 located approximately where the striking face 112 meets the sole 102; a trailing edge 122 adjacent to the back portion 114 and the sole 102; and the sole 102 in between the leading edge 120 and the trailing edge 122. The leading edge 120 can be defined in the current application as approximately the most forward edge of the golf club head 100 (in the z-direction), with the hosel 110 in an upright 90 degree (perpendicular) position from a ground plane 10 (in the front-to-back, z-axis direction) as shown in
The trailing edge 122 is defined as approximately the most rearward edge of the sole portion 102 of the golf club head 100 (in the z-direction), again with the hosel 110 in a 90 degree (perpendicular) position from the ground plane 10 (in the front-to-back, z-axis direction), generally where the sole 102 and the back portion 114 meet.
The invention of the present application incorporates a strategically positioned slot 130 on the sole 102 of the golf club head 100 to improve the performance of the golf club head 100. The slot 130 houses a weighted insert 132. Golf clubs with sole inserts typically position the inserts about the center of the sole in the z direction (front-to-back direction). In the invention of the present application, however, the slot 130 (and therefore, the weighted insert 132) is moved forward towards the striking surface 112. As shown in
The slot 130 is characterized as having a front edge 134, and back edge 136 opposite the front edge 134 and towards the back relative to the front edge 134, a proximal edge 138 adjacent the heel-side of the golf club head 100, and a distal edge 140 adjacent to the toe-side of the golf club head 100. The slot 130 has a width W1 as measured from the front edge 134 to the back edge 136 (see,
The distance D1 of the front edge 134 of the slot 130 to the plane of the inner wall 126 of the striking surface 112 can be about 0 mm to about 8.0 mm. A distance D1 of 0 mm means that the inner wall 126 of the striking surface 112 is in line with or can make up the front edge 134 of the slot 130. In some embodiments, the distance D1 of the front edge 134 of the slot 130 to the plane of inner wall 126 of the striking surface 112 can be less than about 6.0 mm. In some embodiments, the distance D1 of the front edge 134 of the slot 130 to the plane of the inner wall 126 of the striking surface 112 can be less than about 4.0 mm. Preferably, the distance D1 of the front edge 134 of the slot 130 to the plane of the inner wall 126 of the striking surface 112 is less than about 3.5 mm. For example, the distance D1 of the front edge 134 of the slot 130 to the plane of the inner wall 126 of the striking surface 112 can be 3.4 mm or less, 3.3 mm or less, 3.2 mm, 3.1 mm, 3.0 mm, or less. More preferably, the distance D1 of the front edge 134 of the slot 130 to the plane of the inner wall 126 of the striking surface 112 is about 2.5 mm or less. Most preferably, the distance D1 of the front edge 134 of the slot 130 to the plane of the inner wall 126 of the striking surface 112 is about 2.0 mm or less. Preferably, the distance D1 of the slot 130 to the striking surface 112 is generally a uniform distance throughout the length L1 of the slot 130.
As shown in
Similarly, distance D3 from the slot 130 to the distal end 129 of the striking surface 112 is defined as the shortest distance from the distal edge 140 of the slot 130 to a y-z plane defined by the distal end 129 of the striking surface 112. The distance D3 from the distal edge 140 of the slot 130 to the y-z plane of the distal end 129 of the striking surface 112 can be about 5 mm to about 25 mm. Preferably, the distance D3 from the distal edge 140 of the slot 130 to the y-z plane of the distal end 129 of the striking surface 112 can be about 10 mm to about 20 mm. More preferably, the distance D3 from the distal edge 140 of the slot 130 to the y-z plane of the distal end 129 of the striking surface 112 can be about be about 12 mm to about 16 mm.
The slot 130 can also be characterized by its width W1 as measured from the front edge 134 to the back edge 136. The width W1 of the slot 130 can be about 1.0 mm to about 4.0 mm. Preferably, the width W1 of the slot 130 can be about 1.5 mm to about 3.5 mm. More preferably, the width W1 of the slot 130 can be about 2.0 mm to about 3.0 mm.
The slot 130 can further be characterized by its length L1 as measured from the proximal edge 138 to the distal edge 140. In the preferred embodiment, the slot 130 is generally stadium shape having a generally straight front edge 134 and a generally straight back edge 136 with a curved proximal edge 138 and a curved distal edge 140. However, the slot 130 can have other shapes, such as rectangular, oval, and other elongated shapes. The length L1 of the slot 130 can be about 20 mm to about 40 mm. Preferably, the length L1 of the slot 130 can be about 25 mm to about 35 mm. More preferably, the length L1 of the slot 130 can be about 27 mm to about 32 mm.
The insert 132 is shaped and dimensioned to fit inside the slot 130, and can be characterized by its shape. From a bottom plan view as shown in
In some embodiments the height of the insert H1 as measured from a bottom surface to a top surface can be uniform throughout the entire length L2 of the insert 132. As such, inserts 132 with a uniform height H1 can range from about 1 mm to about 5 mm. Preferably, the height H1 of the insert 132 is less than about 5 mm. More preferably, the height H1 of the insert 132 is less than about 4 mm. Most preferably, the height H1 of the insert 132 is less than about 3 mm.
In the preferred embodiment, the insert 132 can have a non-uniform height H1. For example, the proximal end portion 152 and distal end portion 154 of the insert 132 can be raised relative to the main body 150 so that the height H1 of the body 150, which makes up a central portion of the insert 132 is less than the heights H2, H3 of the proximal and distal end portions 152, 154. As such, as the insert 132 progresses from the central portion of the body 150 towards the proximal end portion 152 and the distal end portion 154, the height of the insert 132 can gradually increase, remain flat then gradually increase after a specific point, or remain flat and abruptly increase (step up) at the proximal end portion 152 and distal end portion 154. In some embodiments, the central portion may be recessed, thereby creating a narrow channel in the central portion surrounded by a raised rim (see, e.g.,
For inserts 132 with non-uniform height, the height H1 of the body 150 of the insert 132 can be about 1.0 mm to about 2.5 mm. Preferably, the height H1 of the body 150 of the insert 132 can be about 1.3 mm to about 2.3 mm. More preferably, the height H1 of the body 150 of the insert 132 can be about 1.6 mm to about 2.0 mm. The heights H1, H2 at the proximal end portion 152, the distal end portion 154, or a perimeter rim surrounding the body 150, can each be about 2.0 mm to about 4.0 mm. Preferably, the heights H1, H2 at the proximal end portion 152 and distal end portions 154 can each be about 2.5 mm to about 3.5 mm. More preferably, the heights H1, H2 at the proximal end portion 152 and distal end portions 154 can each be about 2.8 mm to about 3.2 mm.
The overall length L2 of the insert 132 as measured from the proximal end portion 152 to the distal end portion 154 is substantially similar to the length L1 of the slot 130. As such, the overall length L2 of the insert 132 can be about 20 mm to about 40 mm. Preferably, the overall length L2 of the insert 132 can be about 25 mm to about 35 mm. More preferably, the overall length L2 of the insert 132 can be about 27 mm to about 32 mm.
The length L3 of the main body portion 150 of the insert 132 (e.g., the uniformly flat portion of the insert 132 in between the proximal end portion 152 and distal end portion 154 as shown in
With reference to
The striking face portion 212 is located at a frontal portion of the golf club head 200. As a result, the back portion 214 is located opposite the striking face portion 212; the topline 204 is located at an upper portion of the golf club head 200; the heel portion 208 is located at a proximal end of the golf club head 200; the toe portion 206 is located at a distal end of the golf club head 200 opposite the heel portion 208; and the sole 202 is located at a lower portion of the golf club head 200 opposite the topline 204. An axis of origin 12 is provided (for reference only for ease and clarity of description) indicating the x-y-z direction relative to the golf club head 200 in the examples provided.
The golf club head 200 further comprises a leading edge 220 located approximately where the striking face 212 meets the sole 202; a trailing edge 222 adjacent to the back portion 214 and the sole 202; and the sole 202 in between the leading edge 220 and the trailing edge 222. The leading edge 220 can be defined in the current application as approximately the most forward edge of the golf club head 200 (in the z-direction), with the hosel 210 in an upright 90 degree (perpendicular) position from a ground plane 10 (in the front-to-back, z-axis direction) as shown in
The trailing edge 222 can be defined as approximately the most rearward edge of the sole portion 202 of the golf club head 200 (in the z-direction), again with the hosel 210 in a 90 degree (perpendicular) position from the ground plane 10 (in the front-to-back, z-axis direction), generally where the sole portion 202 and the back portion 214 meet.
The invention of the present application incorporates a strategically positioned slot 230 on the sole 202 of the golf club 200 head to improve the performance of the golf club head 200. The slot 230 houses a weighted insert 232. In the invention of the present application, however, the slot 230 (and therefore, the weighted insert 232) is moved forward towards the striking surface 212 compared to traditional golf clubs with inserts. As shown in
As shown in
As shown in
As shown in
Similarly, the distance D6 of the slot 230 to the distal end 229 is defined as the shortest distance from the distal edge 240 of the slot 230 to a y-z plane defined by the distal end 229 of the striking surface 212. The distance D6 from the distal edge 240 of the slot 230 to the y-z plane of the distal end 229 of the striking surface 212 can be about 3.4 mm to about 4.6 mm. Preferably, the distance D6 from the distal edge 240 of the slot 230 to the y-z plane of the distal end 229 of the striking surface 212 can be about 3.6 mm to about 4.4 mm. More preferably, the distance D6 from the distal edge 240 of the slot 230 to the y-z plane of the distal end 229 of the striking surface 212 can be about 3.8 mm to about 4.2 mm.
The slot 230 can also be characterized by its width W2 as measured from the front edge 234 to the back edge 236. The width W2 of the slot 230 can be about 4.0 mm to about 13.0 mm. Preferably, the width W2 of the slot 230 can be about 6.0 mm to about 11.0 mm. More preferably, the width W2 of the slot 230 can be about 8.0 mm to about 9.0 mm.
The slot 230 can further be characterized by its length L4 as measured from the proximal edge 238 to the distal edge 240. In the preferred embodiment, the slot 230 is generally stadium shape having a generally straight front edge 234 and a generally straight back edge 236 with a curved proximal edge 238 and a curved distal edge 240. However, the slot 230 can have other shapes, such as rectangular, oval, and other elongated shapes. The length L4 of the slot 230 can be about 40 mm to about 55 mm. Preferably, the length L4 of the slot 230 can be about 43 mm to about 52 mm. More preferably, the length L4 of the slot 230 can be about 46 mm to about 50 mm.
The insert 232 is shaped and dimensioned to fit inside the slot 230, and can be characterized by its shape. From a bottom plan view as shown in
As such, the insert 232 of the preferred embodiment can have two heights, a first height H4 as measured from the bottom of the insert 232 to the recessed central portion 260 (i.e. the thickness of the recessed central portion 260), and a second height H5 of the insert 232 as measured from the bottom of the insert 232 to the top of the rim 262 of the insert 232. The height H4 of the recessed central portion 26 can be about 1.0 mm to about 2.5 mm. Preferably, the height H4 of the recessed central portion 260 of the insert 132 can be about 1.3 mm to about 2.3 mm. More preferably, the height H4 of the recessed central portion 260 of the insert 132 can be about 1.6 mm to about 2.0 mm. The height H5 of the rim 262 of the insert 232 can be about 2.0 mm to about 4.0 mm. Preferably, the height H5 of the rim 262 can be about 2.5 mm to about 3.5 mm. More preferably, the height H5 of the rim 262 can be about 2.8 mm to about 3.2 mm.
The overall length L5 of the insert 232 is substantially similar to the length L4 of the slot 230 into which the insert 232 is to be inserted. As such, the overall length L5 of the insert 232 can be about 40 mm to about 55 mm. Preferably, the overall length L5 of the insert 232 can be about 43 mm to about 52 mm. More preferably, the overall length L5 of the insert 232 can be about 46 mm to about 50 mm.
The length L6 of the recessed central portion 260 of the insert 232 can be about 39 mm to about 51 mm. Preferably, the length L6 of the recessed central portion 260 of the insert 232 can be about 41 mm to about 49 mm. More preferably, the length L6 of the recessed central portion 260 of the insert 232 can be about 43 mm to about 47 mm. The wall surrounding the recessed portion can be a vertical wall, a ramped wall, a curved wall, a stepped wall, and the like, as the wall descends from the rim 262 to the recessed central portion 260. As such, the width W3 as measured from the inner edge of the rim 262 can be larger than the width W4 of the recessed central portion 260. For example, the width W3 of the inner edge of the rim 262 can be about 3.0 mm to about 6.0 mm. Preferably, the width W3 of the inner edge of the rim 262 can be about 3.5 mm to about 5.5 mm. More preferably, the width W3 of the inner edge of the rim 262 can be about 4.0 mm to about 5.0 mm. The width W4 of the recessed central portion 260 of the insert 232 can be about 1.0 mm to about 3.0 mm. Preferably, the width W4 of the recessed central portion 260 of the insert 232 can be about 1.5 mm to about 2.5 mm. More preferably, the width W4 of the recessed central portion 260 of the insert 232 can be about 1.8 mm to about 2.2 mm.
In any of the embodiments disclosed herein, it may be desirable to facilitate fixture of the insert inside its respective slot. For example, as shown in
With reference to
The striking face portion 312 is located at a frontal portion of the golf club head 300. As a result, the back portion 314 is located opposite the striking face portion 312; the topline 304 is located at an upper portion of the golf club head 300; the heel portion 308 is located at a proximal end of the golf club head 300; the toe portion 306 is located at a distal end of the golf club head 300 opposite the heel portion 308; and the sole 302 is located at a lower portion of the golf club head 300 opposite the topline 304. An axis of origin 12 is provided (for reference only for ease and clarity of description) indicating the x-y-z direction relative to the golf club head 300 in the examples provided.
The golf club head 300 further comprises a leading edge 320 located approximately where the striking face 312 meets the sole 302; a trailing edge 322 adjacent to the back portion 314 and the sole 302; and the sole 302 in between the leading edge 320 and the trailing edge 322. The leading edge 320 can be defined in the current application as approximately the most forward edge of the golf club head 300, with the hosel 310 in an upright 90 degree (perpendicular) position from a ground plane 10 (in the front-to-back, z-axis direction) as shown in
The trailing edge 322, which is defined as approximately the most rearward edge of the sole portion 302 of the golf club head 300 (in the z-direction), again with the hosel 310 in a 90 degree (perpendicular) position from the ground plane 10 (in the front-to-back, z-axis direction), is generally where the sole portion 302 and the back portion 314 meet.
The invention of the present application incorporates a strategically positioned slot 330 on the sole 302 of the golf club 300 head to improve the performance of the golf club head 300. The slot 330 houses a weighted insert 332. In the invention of the present application, the slot 330 (and therefore, the weighted insert 332) is moved forward towards the striking surface 212 compared to traditional golf clubs with inserts. As shown in
As shown in
As shown in
The slot 330 can also be characterized by its distance from the proximal end 328 (or heel end) of the striking surface 312 (which is essentially where the bottom scoreline 318 ends at the heel portion 208). The distance D8 from the slot 330 to the proximal end 328 of the striking surface 312 is defined as the shortest distance from the proximal edge 338 of the slot 330 to a y-z plane defined by the proximal end 328 of the striking surface 312. The distance D8 from the proximal edge 338 of the slot 330 to the y-z plane of the proximal end 328 of the striking surface 312 can be about 0 mm to about 1.5 mm. Preferably, the distance D8 from the proximal edge 338 of the slot 330 to the proximal end 328 of the y-z plane of the striking surface 312 can be about 0.15 mm to about 1.2 mm. More preferably, the distance D8 from the proximal edge 338 of the slot 330 to the y-z plane of the proximal end 328 of the striking surface 312 can be about 0.3 mm to about 0.9 mm.
In some embodiments, however, the proximal edge 338 of the slot 330 can extend past the proximal end 328 of the striking surface 312 further towards or into the heel portion 308. For example, the proximal edge 338 can extend up to 10 mm past the proximal end 328 of the striking surface 312. Preferably, the proximal edge 338 can extend up to 8 mm past the proximal end 328 of the striking surface 312. More preferably, the proximal edge 338 can extend up to 5 mm past the proximal end 328 of the striking surface 312.
With respect to the distal edge 340 of the slot 330, in the preferred embodiment, the distal edge 340 can continue past the distal end 329 of the striking surface 312 up into the toe portion 306. The distal edge 340 can rise up into the toe portion 306 up to a height H6 of about 50 mm above the sole 302 (or ground plane 10). Preferably, the distal edge 340 can rise up into the toe portion 306 up to a height H6 of about 40 mm above the sole 302. More preferably, the distal edge 340 can rise up into the toe portion 306 up to a height H6 of about 30 mm above the sole 302.
In general, the slot 330 maintains a uniform distance from the striking face 312. However, in some embodiments, a distal end portion of the slot 330 encompassing the distal edge 340 can be characterized by a curvature away from the striking face 312 creating a larger distance D9 from the apex of the distal edge 340 to the inner wall 326 of the striking surface 312 compared to the distance D7 of front edge 334 of the slot 330 to the inner wall 326 of the striking surface 312. By having a distal end portion curve away from the striking face 312, the distal edge 340 can be a distance D9 of about 2.0 mm to about 12.0 mm away from the inner wall 326 of the striking surface 312. Preferably, the distal edge 340 can be a distance D9 of about 4.0 mm to about 10.0 mm away from the inner wall 326 of the striking surface 312. More preferably, the distal edge 340 can be a distance D9 of about 6.0 mm to about 8.0 mm away from the inner wall 326 of the striking surface 312.
The radius of curvature R1 of the front edge 334 of the distal end portion as it curves away from the striking surface 312 can be about 20.0 mm to about 40.0 mm. The radius of curvature R1 of the front edge 334 as it curves away from the striking surface 312 can be about 20.0 mm to about 40.0 mm. Preferably, the radius of curvature R1 of the front edge 334 as it curves away from the striking surface 312 can be about 23.0 mm to about 37.0 mm. More preferably, the radius of curvature R1 of the front edge 334 as it curves away from the striking surface 312 can be about 27.0 mm to about 33.0 mm. The radius of curvature R2 of the corresponding back edge 336 as it curves away from the striking surface 312 can be about 16.0 mm to about 39.0 mm. Preferably, the radius of curvature R2 of the back edge 336 as it curves away from the striking surface 312 can be about 19.0 mm to about 35.0 mm. More preferably, the radius of curvature R2 of the back edge 336 as it curves away from the striking surface 312 can be about 22.0 mm to about 32.0 mm.
In embodiments in which the distal edge 340 curves away from the striking surface 312 the height H6 of the distal edge 340 above the sole 302 (or the ground plane 10) may be about 4 mm to about 16 mm. Preferably, the height H6 of the distal edge 340 above the sole 302 may be about 6 mm to about 14 mm. More preferably, the height H6 of the distal edge 340 above the sole 302 may be about 8 mm to about 12 mm.
The slot 330 can also be characterized by its width W5 as measured from the front edge 334 to the back edge 336. The width W5 of the slot 330 can be about 1.0 mm to about 4.0 mm. Preferably, the width W5 of the slot 330 can be about 1.5 mm to about 3.5 mm. More preferably, the width W5 of the slot 330 can be about 2.0 mm to about 3.0 mm.
The slot 330 can further be characterized by its length L7 as measured from the proximal edge 338 to the distal edge 340. In the preferred embodiment, the slot 330 is generally stadium shape having a generally straight front edge 334 and a generally straight back edge 336 (aside from the curvature at the distal end in some embodiments) with curved proximal end 338 and distal end 340. However, the slot 330 can have other shapes, such as rectangular, oval, and other elongated shapes. The length L7 of the slot 330 can be about 55 mm to about 85 mm. Preferably, the length L7 of the slot 330 can be about 60 mm to about 80 mm. More preferably, the length L7 of the slot 330 can be about 65 mm to about 75 mm.
The insert 332 is shaped and dimensioned to fit inside the slot 330. As such, the shape and dimensions of the insert 332 is substantially the same as the slot 330. For example, the overall length L8 of the insert 332 can be about 55 mm to about 85 mm. Preferably, the overall length L8 of the insert 332 can be about 60 mm to about 80 mm. More preferably, the overall length L8 of the insert 332 can be about 65 mm to about 75 mm.
The insert 332 of the present embodiment can also have a height H7 as measured from the bottom of the insert 332 to the top of the insert 332 that can be less than about 5.0 mm. For example, the height H7 can be about 4.9 mm or less, 4.8 mm or less, 4.7 mm or less, and so on. Preferably, the height H7 of the insert 332 can be about 2.0 mm to about 4.5 mm. More preferably, the height H7 of the insert 332 can be about 2.5 mm to about 4.0 mm.
The golf club head 100 of the present invention can be manufactured using casting or forging technology according to the specification disclosed herein using materials such as titanium, steel, carbon fiber, and other typical metals used in manufacturing irons. Any of the inserts described herein can be fastened to the sole using adhesives, friction fit, catch type mechanisms, and the like. In the preferred embodiment, the insert is made with polymer material known in the art.
In one embodiment, a 3 iron was tested in which the front edge 334 of the slot 330 was approximately 2 mm or less from the inner wall 326 of the striking surface 312 (D7 less than or equal to about 2 mm). The proximal edge 338 of the slot 330 extended beyond the proximal end 328 of the striking face 312 by about 10 mm or less. The distal edge 340 of the slot 330 extended beyond the distal end 329 of the striking face 312 by about 10 mm or less. Compared to the control iron (3 iron without insert), this configuration placed the center of gravity in the x-direction (CGx) closer to the face center (by about 2 mm), in the y-direction (CGy) slightly lower (by about 0.4 mm), and in the z-direction (CGz) about the same. The coefficient of restitution (COR) was slightly higher in the present embodiment (0.823-0.825) compared to that of control (0.819).
The ball speed of the this embodiment was generally higher than control. The largest difference in ball speed was found at the lower toe region of the striking face 312. The middle (y direction) toe (x direction) region, the lower center region, and the middle center region also showed increase in ball speed. The heel region showed inconsistent results.
With respect to backspin on a golf ball struck with the current embodiment, the present embodiment showed increased backspin at the toe, center, and heel region of the striking face 312. In one comparison, the present invention generated a backspin that was more than 1000 rpm faster than control when measured at the lower and middle toe region, the lower and middle center region, and the lower and middle heel region.
In another 3 iron example in which the slot 330 extended from about the proximal end 328 of the striking surface 312 well into the toe portion 306, and approaching the topline 304 (i.e. the distal edge 340 of the slot 330 was above the face center), a comparison against a control 3 iron showed a slight increase in ball speed, particularly at the lower and middle toe region, and lower and middle center region, a slightly lower launch angle at the toe, center, and heel region, and increased backspin at the toe and center region.
As such, configurations of the present invention increased ball speed, increased backspin, and decreased loft angles.
Any of the features and characterizations of the example embodiments are not necessarily exclusive to the embodiments in which the features and characterizations were disclosed. The disclosure provides descriptions based on exemplary embodiments, and it is contemplated that features and characteristics in one exemplary embodiment can apply to any other embodiment.
Other than in the operating examples, or unless otherwise expressly specified, all of the numerical ranges, amounts, values and percentages such as those for radius of curvature, angles, and others in the aforementioned portions of the specification may be read as if prefaced by the word “about” or “approximately” even though the term “about” may not expressly appear in the value, amount, or range. Accordingly, unless indicated to the contrary, the numerical parameters set forth in the above specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by the present invention. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements. Furthermore, when numerical ranges of varying scope are set forth herein, it is contemplated that any combination of these values inclusive of the recited values, and any values in between any ranges cited, may be used.
The foregoing description of the preferred embodiment of the invention has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed. Many modifications and variations are possible in light of the above teaching. It is intended that the scope of the invention not be limited by this detailed description, but by the claims and the equivalents to the claims appended hereto.
In some embodiments, the presently disclosed technology described herein contemplates a golf club head, such as for an iron, a fairway wood, a driver, or another type of golf club head, that includes a leading edge insert. The leading edge insert can improve performance, including, for example, increased distance and reduced spin. The leading edge insert may allow for reduced stress on a leading edge of the golf club head.
The presently disclosed technologies may provide a golf club head including a body. The body may include an interior cavity, a face, a back extending rearward from at least a part of the face, and a sole. The sole may include a leading edge, a leading edge slot rearward of the face, a central region rearward of the leading edge slot, and a trailing edge rearward of the central region. The golf club head may include a leading edge insert to fit into the leading edge slot. The leading edge insert may include an insert body and an insert channel. The leading edge insert may be made of a compliant material, as will be discussed herein, such that impacts on the striking face compress the leading edge insert which may increase distance and reduce spin.
Establishing a reference coordinate system for the presently disclosed technology, an x-axis may refer to the axis that is horizontal to the face from a heel to toe direction, a y-axis may refer to the vertical axis through the club in a crown to sole direction, a z-axis may refer to the horizontal axis that is horizontal front to back in a forward and rear direction. Alternatively speaking, it can be the x-axis is defined as a horizontal axis tangent to a geometric center of the face with the positive direction towards a heel of the golf club head, a y-axis is a vertical axis orthogonal to the x-axis with a positive direction towards a top of the golf club head, and a z-axis being orthogonal to both the x-axis and the y-axis with a positive direction towards a front of the golf club head. The x-y-z coordinate system described above shall be the same for all subsequent discussions. Herein, faceward or frontward may mean toward a face of a golf club head, rearward or backward may mean toward a rear of a golf club head, toeward may mean toward a toe of a golf club head, heelward may mean toward a heel of a golf club head, upward or topward may mean toward a top of a golf club head, downward, soleward, or bottomward may mean toward a bottom of a golf club head.
Face 1804 may refer to the striking face of golf club head 1800, that is, the surface on which a golf ball is intended to be struck. Face 1804 may refer to the portion of golf club head 1800 that is substantially planar and located at the frontal portion of golf club head 1800. Face 1804 may be adapted to strike a golf ball. Face 1804 may be separated by sole 1810 by leading edge 1812. Heel 1805 may refer to a heel end of golf club head 1800. This may be a region of golf club head 1800 that is nearest to a user at address. Toe 1807 may refer to a toe end of golf club head 1800. This may be the region of golf club head 1800 that is furthest from a user at address. This may include a surface intended to strike a golf ball. Hosel 1808 may refer to a hollow section of golf club head 1800 where a shaft (not shown) can be inserted. Sole 1810 may refer to a sole or bottom of golf club head 1800. Sole 1810 may extend from face 1804 on a bottom of golf club head 1800. At least a portion of sole 1810 may be intended to interact with a playing surface (e.g., turf, grass, sand, etc.) as golf club head 1800 contacts a golf ball.
Ribs 1809 may extend from an interior surface of sole 1810 to a rear surface of rear slot wall 1815. In some embodiments, ribs 1809 may be arcuate, thought it should be appreciated that ribs 1809 may be otherwise shaped, sized, and/or dimensioned without departing from the spirit and scope of the presently disclosed technology. Ribs 1809 may provide support and/or rigidity to face 1804 and/or rear slot wall 1815. For example, ribs 1809 may prevent rear slot wall 1815 from collapsing onto sole 1810. As illustrated, there may be two ribs 1809, however, it should be appreciated that there may be more or fewer ribs 1809 without departing from the spirit and scope of the presently disclosed technology.
Sole 1810 may include leading edge 1812, leading edge slot 1814, central region 1816, and/or trailing edge 1818. Leading edge 1812 may refer to a region of golf club head 1800 where face 1804 meets sole 1810. Leading edge 1812 may also be understood as a boundary between face 1804 and sole 1810 such that a surface of golf club head 1800 deviates from a substantially planar vertical orientation towards a substantially horizontal orientation. When the particular golf club is a fairway wood type golf club, leading edge 1812 may be a region of golf club head 1800 that is intended to contact a playing surface (e.g., turf, sand, etc.) first when striking the ball. Leading edge slot 1814 may be a slot or opening in an exterior surface of sole 1810 exposing an interior cavity of golf club head 1800. Leading edge slot 1814 may be rectangular when viewed from below, thought it should be appreciated that leading edge slot 1814 may be differently shaped, sized, and/or dimensioned without departing from the spirit and scope of the presently disclosed technology. Leading edge slot 1814 may include rear slot wall 1815. A top of rear slot wall 1815 may be curved toward face 1804 to receive leading edge insert 1820. It should be appreciated that that rear slot wall 1815 may be otherwise shaped, sized, and/or dimensioned without departing from the spirit and scope of the presently disclosed technology. Referring to
A slot width WS of leading edge slot 1814 may be greater than a slot depth DS of leading edge slot 1814. Slot width WS may be greater than about fifty percent of a sole width. In some embodiments, slot width WS may be greater than about seventy-five percent of a sole width. In embodiments, slot width WS may be greater than about ninety percent of a sole width. Widths, depths, and other dimensions may be measured along a horizontal plane or along a surface of the component. For example, along a horizontal plane, slot depth DS may be between about 3.0 mm and about 10.0 mm. The corresponding surface distance, the distance measured along the surface of leading edge slot 2514, may be between about 3.4 mm and about 11.4 mm. In embodiments, a horizontal distance of slot depth DS may be between about 5.0 mm and about 8.0 mm. In some embodiments, a horizontal distance of slot depth DS may be about 7.0 mm. For example, along a horizontal plane, slot width WS may be between about 70.0 mm and about 100.0 mm. The surface distance for this example of a slot width WS may be between about 80.0 mm and about 110.0 mm. In some embodiments, a horizontal distance of slot width WS may be between about 90.0 mm and about 110.0 mm. In embodiments, a horizontal distance of slot width WS may be about 94.0 mm or about 105.0 mm.
Referring back to
Leading edge insert 1820 may fit within leading edge slot 1814. An insert width W1 of leading edge insert 1820 may be greater than an insert depth D1 of leading edge insert 1820. Insert width W1 may be about the same width as slot width WS. For example, a horizontal distance of insert width W1 may be between about 70.0 mm and about 100.0 mm, and so on, as discussed herein. In some embodiments, insert width W1 may be slightly wider to pressure fit leading edge insert 1820 into leading edge slot 1814. In embodiments, insert width W1 may be slightly less wide to be able to fit within leading edge slot 1814, including any adhesive. Insert depth D1 may be about the same depth as slot depth DS. For example, a horizontal distance of insert depth D1 may be between about 3.0 mm and about 10.0 mm, and so on, as discussed herein. In some embodiments, insert depth D1 may be slightly deeper to pressure fit leading edge insert 1820 into leading edge slot 1814. In embodiments, insert depth D1 may be slightly less deep to be able to fit within leading edge slot 1814, including any adhesive. Leading edge insert 1820 may be installed into an installed position. The installed position, as illustrated in at least
Referring to
Leading edge slot 2514 may be differently shaped, sized, and/or dimensioned than leading edge slot 1814 without departing from the spirit and scope of the presently disclosed technology. For example, leading edge slot 2514 may be wider. Leading edge slot 2514 may include rear slot wall 2515. Rear slot wall 2515 may include lip 2517. Lip 2517, as illustrated in at least
Referring to
Leading edge slot 2814 may include insert body 2822, first supporting members 2836, central layer 2838, second supporting members 2839, top layer 2840, and/or third supporting members 2841. Leading edge slot 2814 may be differently shaped, sized, and/or dimensioned than leading edge slot 1814 without departing from the spirit and scope of the presently disclosed technology. For example, leading edge slot 2814 may be wider and include different components.
Referring to
Central layer 2838 may be a second layer of leading edge insert 2820. Central layer 2838 may be positioned above insert body 2822. Central layer 2838 may include second supporting members 2839. Central layer 2838 may include a fourth material. The fourth material may be different from the first material, the second material, and/or the third material. For example, the fourth material may be another metal. In some embodiments, the fourth material may be the same as the first material, the second material, and/or the third material. For example, the second material may be the same as the second material. Second supporting members 2839 may include a fifth material. The fifth material may be different from the first material, the second material, the third material, and/or the fourth material. For example, the fifth material may be another polymer. In some embodiments, the fifth material may be the same as one of the first material, the second material, the third material, and/or the fourth material. For example, it may be the same as the first material. Second supporting members 2839 may be illustrated as cylindrical regions on a toe- and heel-edge of central layer 2838. In embodiments, second supporting members 2839 may engage with first supporting members 2836. For example, a bottom of second supporting members 2839 may engage with a top of first supporting members 2836. Second supporting members 2839 may include protruded members on a top and a bottom of second supporting members 2839 to fit into recessed regions on a top of first supporting members 2836 and/or a bottom of third supporting members 2841. Second supporting members 2839 may be glued, pressure fit, adhered, fastened, or otherwise secured to first supporting members 2836. In some embodiments, central layer 2838 and second supporting members 2839 may be integrated as a unitary component. In embodiments, central layer 2838 and second supporting members 2839 may be separate components. In some embodiments, central layer 2838 and second supporting members 2839 may be secured together. For example, central layer 2838 and second supporting members 2839 may be secured by glue, pressure fit, or other mechanisms or adhesive substances.
Top layer 2840 may be a third layer of leading edge insert 2820. Top layer 2840 may be positioned above central layer 2838. Top layer 2840 may include third supporting members 2841. Top layer 2840 may include a sixth material. The sixth material may be different from the first material, the second material, the third material, the fourth material, and/or the fifth material. For example, the sixth material may be another polymer. In some embodiments, the sixth material may be the same as the first material, the second material, the third material, the fourth material, and/or the fifth material. Third supporting members 2841 may be illustrated as cylindrical regions on a toe- and heel-edge of top layer 2840. Third supporting members 2841 may include recessed regions on a bottom part of third supporting members 2841 to receive a top of second supporting members 2839. Third supporting members 2841 may include a seventh material. The seventh material may be different from the first material, the second material, the third material, the fourth material, the fifth material, and/or the sixth material. For example, it may be another polymer. In some embodiments, the seventh material may be the same as one of the first material, the second material, the third material, the fourth material, the fifth material, and/or the sixth material. For example, it may be the first material. In embodiments, third supporting members 2841 may engage with first supporting members 2836. For example, a bottom of third supporting members 2841 may engage with a top of second supporting members 2839. Third supporting members 2841 may be glued, pressure fit, adhered or otherwise secured to second supporting members 2839. In some embodiments, top layer 2840 and third supporting members 2841 may be integrated as a unitary component, as discussed herein. In embodiments, top layer 2840 and third supporting members 2841 may be separate components. In some embodiments, top layer 2840 and third supporting members 2841 may be secured together. For example, top layer 2840 and third supporting members 2841 may be secured by glue, fastener, or other mechanisms or adhesive substances. In some embodiments, top layer 2840 and insert body 2822 may be molded onto central layer 2838. Top layer 2840 and insert body 2822 may be a single piece that may be referred to collectively as insert body 2822.
Referring to
Other than in at least some of the operating examples, or unless otherwise expressly specified, all of the numerical ranges, amounts, values and percentages such as those for amounts of materials, moment of inertias, center of gravity locations, loft, angles, various ratios, and others in the aforementioned portions of the specification may be read as if prefaced by the word “about” even though the term “about” may not expressly appear in the value, amount, or range. Accordingly, unless indicated to the contrary, the numerical parameters set forth in the above specification and appended claims are approximations that may vary depending upon the desired properties sought to be obtained by the presently disclosed technology. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the presently disclosed technology are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements. Furthermore, when numerical ranges of varying scope are set forth herein, it is contemplated that any combination of these values inclusive of the recited values may be used.
While various embodiments of the disclosed technology have been described above, it should be appreciated these are examples only, and not limiting. Likewise, the various figures may depict an example configuration or structure to aid in understanding the features and functionality that can be included in the disclosed technology. The presently disclosed technology is not intended to be restricted to the illustrated example configurations and structures, and the desired features can be implemented with a variety of alternative configurations and structures. It may be apparent to one of skill in the art how alternative embodiments can be implemented to impart the desired features of the presently disclosed technology. Therefore, it will be understood that the appended claims are intended to cover all such modifications and embodiments, which would come within the spirit and scope of the presently disclosed technology.
While the presently disclosed technology may be described herein in terms of various exemplary embodiments, it should be understood that the various features described in any individual embodiment is not limited to its particular embodiment, and can be applied, whether alone or in combinations with features of other embodiments, to another embodiment, whether or not such an embodiment is described herein or described as part of a single embodiment. Thus, the breadth and scope of the presently disclosed technology should not be limited to any of the above-described exemplary embodiments.
Words, phrases, and their variations that are used herein, unless otherwise expressly stated, should be construed as open ended, not as limiting. For example, the term “include” should be read to mean “include, without limitation”; the term “example” should be read to mean the following provides exemplary instances, not an exhaustive or limiting list thereof; “a” or “an” should be read as meaning “at least one,” “one or more” etc.; and “traditional,” “normal,” and similar terms should not be construed as limiting to a given time period, but should be read to encompass traditional, normal, like technologies that may be known now or at any future point. In addition, references herein to technologies that would be apparent or known to one of ordinary skill in the art includes such technologies that are apparent or known to one of ordinary skill in the art now or at any time in the future.
The presence of words and phrases such as “one or more,” “at least,” “not limited to,” or other similar phrases shall not be read to necessarily mean that the narrower case is intended in instances where such broadening phrases may be absent. The presence of words such as “first,” “second,” or other similar words shall not be read to mean that there can only be one or two elements.
This application is a continuation-in-part (CIP) of U.S. patent application Ser. No. 17/940,841, filed Sep. 8, 2022, the disclosure of which is incorporated by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 17940841 | Sep 2022 | US |
| Child | 18499542 | US |
