KR20220168551A - Golf club having a damping element for ball speed control - Google Patents

Abstract

The present invention relates to a golf club head which comprises: a striking surface; and an outer edge portion surrounding the striking surface and extending backwards from the striking surface. The striking surface includes a front surface formed to strike a golf ball, a rear surface opposite the front surface, and a support arm spaced from the rear surface of the striking surface. The support arm extends from a peripheral portion and is attached to the peripheral portion at two separate locations. In addition, a damping element is present between the support arm and the rear surface of the striking surface, and comprises a front surface contacting the rear surface of the striking surface and a rear surface contacting the support arm. Moreover, the support arm extends substantially parallel to a horizontal axis.

Description

Golf club having a damping element for ball speed control {GOLF CLUB HAVING A DAMPING ELEMENT FOR BALL SPEED CONTROL}

This application is a continuation-in-part of pending U.S. Patent Application No. 17/138,618 filed on December 30, 2020, which is a continuation-in-part of pending U.S. Patent Application No. 17/138,618, filed on December 18, 2020. 127,061, which is a continuation-in-part of pending U.S. Patent Application No. 17/085,474, filed on October 30, 2020, which was filed on March 27, 2020 and is now It is a continuation-in-part of U.S. Patent Application No. 16/833,054, filed as Patent No. 11,020,639, which is a continuation-in-part of U.S. Patent Application No. 16/286,412, filed on February 26, 2019 and currently patented as U.S. Patent No. 10,625,127. , which is a continuation-in-part of U.S. Patent Application No. 16/225,577, filed on December 19, 2018 and now abandoned, which is filed on October 12, 2018 and is currently patented as U.S. Patent No. 10,293,226 U.S. Patent Application No. 16/158,578, which is a continuation-in-part of U.S. Patent Application No. 16/027,077, filed on July 3, 2018, and which is now abandoned, which is filed on July 26, 2016 It is a continuation-in-part of U.S. Patent Application No. 15/220,122, filed on October 3, 2019, and is currently patented as U.S. Patent No. 10,086,244, and is a continuation-in-part of U.S. Patent Application No. 17/085,474, filed on October 3, 2019, and currently patented as U.S. Patent No. 10,821,344. Application Ser. No. 16/592,170, which is a continuation-in-part of U.S. Patent Application No. 16/214,405, filed on December 10, 2018 and now patented as U.S. Patent No. 10,471,319, and U.S. Patent Application No. 17/ 085,474 was filed on May 2, 2019 and is a continuation-in-part of U.S. Patent Application No. 16/401,926, currently patented as U.S. Patent No. 10,821,338, which is a continuation-in-part of U.S. Patent Application No. 15/848,697, filed December 20, 2017 and now abandoned; This patent application is a continuation-in-part of U.S. Patent Application No. 15/359,206, filed on November 22, 2016 and now patented as U.S. Patent No. 10,150,019, which is filed on July 26, 2016 and is now U.S. Patent No. 9,993,704 15/220,107, which is incorporated herein by reference in its entirety. To the extent appropriate, this application claims priority over the above-referenced applications.

One goal is to reduce the total score by reducing the total number of swings a golfer needs to complete a round of golf. To achieve this goal, it is generally desirable for a golfer to have the ball travel a consistent distance when striking with the same golf club, and with some clubs it is also desirable to have the ball travel a great distance. For example, when a golfer hits a golf ball slightly wrong, the golfer does not want the golf ball to travel a significantly different distance. At the same time, the golfer does not want the overall distance to be significantly reduced each time the golfer hits the ball, even when the golfer hits the ball at the "sweet spot" of the golf club. It is also desirable for the golf club head to produce a pleasant sound to the golfer when the golf club head strikes a golf ball.

One non-limiting embodiment of the present technology includes a golf club head comprising a striking surface, a peripheral portion surrounding the striking surface and extending rearwardly from the striking surface, and a coordinate system centered on the center of gravity of the golf club head, wherein the coordinate system comprises a golf club a y-axis extending perpendicularly and perpendicularly to the horizon when the head is at a defined loft and lie at address position, an x-axis perpendicular to the y-axis and parallel to the striking surface and extending toward the heel of the golf club head, and a z-axis perpendicular to the y-axis and the x-axis and extending through the striking surface, the striking surface comprising: a front surface configured to hit a golf ball and a rear surface opposite the front surface spaced apart from the rear surface of the striking surface; comprising a support arm, the support arm extending from the peripheral portion, the support arm being attached to the peripheral portion at two distinct locations, a damping element between the support arm and the rear surface of the striking surface, and the damping element comprising the striking element. a front surface in contact with the rear surface of the face and a rear surface in contact with the support arm, wherein the peripheral portion includes a sole extending rearwardly from the bottom of the striking face and a topline extending rearwardly from the top of the striking face; The support arm includes a first portion extending from the sole toward the damping element and a second portion extending from a topline toward the damping element, the first portion of the support arm having a first thickness along the z-axis and a first thickness along the x-axis. has a first thickness, the first thickness along the z-axis is greater than the first thickness along the x-axis, the second portion of the support arm has a second thickness along the x-axis and a second thickness along the z-axis, and - the second thickness along the z-axis is greater than the second thickness along the z-axis, a medallion glued to a peripheral portion of the golf club head creates an internal cavity, the support arm and damping element are within the cavity, and the damping element is present in the cavity. Elements include elastomers.

In a further non-limiting embodiment of the present technology, a periphery of the front surface of the damping element forms a support area, the support area includes a geometric center, the striking surface includes a plurality of scorelines, and the striking surface comprises a y-axis and a heel reference plane extending parallel to the x-axis, the heel reference plane being offset 1 millimeter toward the heel from the heel-side end of the scoreline, the geometric center of the support area being the heel measured parallel to the x-axis. located at the support area offset length from the reference plane toward the toe, the striking surface including a striking surface length measured from the heel reference plane to the toe-side end of the front surface of the striking surface parallel to the x-axis; contains a support region offset ratio including the support region offset length divided by the striking surface length multiplied by 100%, and the support region offset ratio is equal to or greater than 40%.

A further non-limiting embodiment of the present technology includes a second damping element in contact with the striking surface, the second damping element being separate and distinct from the damping element.

Additional non-limiting embodiments of the present technology include a golf club head comprising a striking surface, a peripheral portion surrounding the striking surface and extending rearwardly from the striking surface, and a coordinate system centered on the center of gravity of the golf club head, wherein the coordinate system comprises a golf club a y-axis extending perpendicularly and perpendicularly to the horizon when the head is at a defined loft and lie at address position, an x-axis perpendicular to the y-axis and parallel to the striking surface and extending toward the heel of the golf club head, and a z-axis perpendicular to the y-axis and the x-axis and extending through the striking surface, the striking surface comprising: a front surface configured to hit a golf ball and a rear surface opposite the front surface spaced apart from the rear surface of the striking surface; comprising a support arm, the support arm extending from the peripheral portion, the support arm being attached to the peripheral portion at two distinct locations, a damping element between the support arm and the rear surface of the striking surface, and the damping element comprising the striking element. a front surface in contact with the back surface of the face and a back surface in contact with the support arm, the support arm extending substantially parallel to the y-axis.

In a further non-limiting embodiment of the present technology, the peripheral portion includes a sole extending rearwardly from the bottom of the striking surface and a topline extending rearwardly from the top of the striking surface, the support arm extending from the sole toward the damping element. It includes a first part and a second part extending from the topline towards the damping element.

In an additional non-limiting embodiment of the present technology, the first portion of the support arm has a first thickness along the z-axis and a first thickness along the x-axis, the first thickness along the z-axis being the first thickness along the x-axis. and the second portion of the support arm has a second thickness along the x-axis and a second thickness along the z-axis, the second thickness along the x-axis being greater than the second thickness along the z-axis.

In a further non-limiting embodiment of the present technology, a medallion glued to a peripheral portion of a golf club head creates an internal cavity, and the support arm and damping element reside within the cavity.

In a further non-limiting embodiment of the present technology, the damping element comprises an elastomer.

In a further non-limiting embodiment of the present technology, a periphery of the front surface of the damping element forms a support area, the support area includes a geometric center, the striking surface includes a plurality of scorelines, and the striking surface comprises a y-axis and a heel reference plane extending parallel to the x-axis, the heel reference plane being offset 1 millimeter toward the heel from the heel-side end of the scoreline, the geometric center of the support area being the heel measured parallel to the x-axis. located at the support area offset length from the reference plane toward the toe, the striking surface including a striking surface length measured from the heel reference plane to the toe-side end of the front surface of the striking surface parallel to the x-axis; contains a support region offset ratio including the support region offset length divided by the striking surface length multiplied by 100%, and the support region offset ratio is equal to or greater than 40%.

A further non-limiting embodiment of the present technology includes a second damping element in contact with the striking surface, the second damping element being separate and distinct from the damping element.

Additional non-limiting embodiments of the present technology include a golf club head comprising a striking surface, a peripheral portion surrounding the striking surface and extending rearwardly from the striking surface, and a coordinate system centered on the center of gravity of the golf club head, wherein the coordinate system comprises a golf club a y-axis extending perpendicularly and perpendicularly to the horizon when the head is at a defined loft and lie at address position, an x-axis perpendicular to the y-axis and parallel to the striking surface and extending toward the heel of the golf club head, and a z-axis perpendicular to the y-axis and the x-axis and extending through the striking surface, the striking surface comprising: a front surface configured to hit a golf ball and a rear surface opposite the front surface spaced apart from the rear surface of the striking surface; comprising a support arm, the support arm extending from the peripheral portion, the support arm being attached to the peripheral portion at two distinct locations, a damping element between the support arm and the rear surface of the striking surface, and the damping element comprising the striking element. a front surface in contact with the rear surface of the face and a rear surface in contact with the support arm, the support arm having a first portion extending towards the damping element from the heel side of the golf club head and the damping element from the toe side of the golf club head. and a second portion extending towards the element.

In a further non-limiting embodiment of the present technology, a heel side weight and a toe side weight are included, wherein a first portion of the support arm extends from the heel side weight and a second portion of the support arm extends from the toe side weight. extend

In a further non-limiting embodiment of the present technology, the first portion of the support arm has a first thickness along the x-axis and a first thickness along the z-axis, the first thickness along the x-axis being the first thickness along the z-axis. and the second portion of the support arm has a second thickness along the x-axis and a second thickness along the z-axis, the second thickness along the x-axis being greater than the second thickness along the z-axis.

A further non-limiting embodiment of the present technology includes a medallion glued to a peripheral portion of a golf club head to create an internal cavity, wherein the support arm and damping element reside within the cavity.

In a further non-limiting embodiment of the present technology, the damping element comprises an elastomer.

In a further non-limiting embodiment of the present technology, the first portion of the support arm is angled upward from the heel side of the golf club head towards the damping element at an angle to the x-axis greater than 5 degrees.

In a further non-limiting embodiment of the present technology, the second portion of the support arm is angled upward from the toe side of the golf club head towards the damping element at an angle to the x-axis greater than 5 degrees.

In a further non-limiting embodiment of the present technology, the first portion of the support arm is angled upwardly from the heel side of the golf club head towards the damping element at an angle to the x-axis greater than 5 degrees, and the first portion of the support arm is angled upwardly from the heel side of the golf club head. Part 2 angles upward from the toe side of the golf club head towards the damping element at an angle to the x-axis greater than 5 degrees.

In a further non-limiting embodiment of the present technology, a periphery of the front surface of the damping element forms a support area, the support area includes a geometric center, the striking surface includes a plurality of scorelines, the striking surface comprises a y-axis and a heel reference plane extending parallel to the x-axis, the heel reference plane being offset 1 millimeter toward the heel from the heel-side end of the scoreline, the geometric center of the support area being the heel measured parallel to the x-axis. located at the support area offset length from the reference plane toward the toe, the striking surface including a striking surface length measured from the heel reference plane to the toe-side end of the front surface of the striking surface parallel to the x-axis; contains a support region offset ratio including the support region offset length divided by the striking surface length and multiplied by 100%, and the support region offset ratio is equal to or greater than 40%.

A further non-limiting embodiment of the present technology includes a second damping element in contact with the striking surface, the second damping element being separate and distinct from the damping element.

The "Means for Solving the Problem" herein is provided to introduce a selection of concepts that are further described in the "Specific Contents for Carrying Out the Invention" in a simple form. References herein to "means for solving the problem" are not intended to identify key features or essential features of the claimed subject matter, nor are they intended to be used to limit the scope of the claimed subject matter.

Non-limiting and non-exhaustive examples are described with reference to the figures that follow.

1A-1B are cross-sectional views of a golf club head having an elastomeric element.
FIG. 1C shows a perspective cross-sectional view of the golf club head shown in FIGS. 1A-1B.
2A-2B show cross-sectional views of a golf club head having an elastomeric element with a thick central portion and a striking face.
3A-3B show cross-sectional views of a golf club head having an elastomeric element and an adjustment mechanism for adjusting compression of the elastomeric element.
4A shows a perspective view of another example golf club head having an elastomeric element and an adjustment mechanism for adjusting compression of the elastomeric element.
FIG. 4B is a cross-sectional view of the golf club head of FIG. 4A.
4C shows a cross-sectional view of another example golf club having an elastomeric element and an adjustment mechanism for adjusting compression of the elastomeric element.
5A shows a stress contour plot for a golf club head without an elastomeric element.
5B shows a stress contour plot for a golf club head with elastomeric elements.
6A shows a front view of a golf club head.
FIG. 6B shows a head toe view of the golf club head of FIG. 6A.
FIG. 6C shows a cross-section AA of the golf club head of FIG. 6A.
FIG. 6D shows a perspective view of the golf club head of FIG. 6A oriented perpendicular to the striking surface.
FIG. 6E shows a perspective view of the golf club head of FIG. 6A oriented orthogonal to the striking surface that includes the support area.
7A shows a perspective view of a golf club head.
FIG. 7B shows an additional perspective view of the golf club head of FIG. 7A.
7C is a rear view of the golf club head of FIG. 7A.
FIG. 8A shows a cross-sectional view BB of the golf club head of FIG. 7C.
FIG. 8B shows a cross-sectional view (CC) of the golf club head of FIG. 7C.
FIG. 8C shows a cross-sectional view DD of the golf club head of FIG. 7C.
FIG. 9A shows an additional cross-sectional view of the front of the golf club head of FIG. 7A omitting the striking surface.
9B shows a cross-sectional view from FIG. 9A with the deformable member removed.
FIG. 10 shows a perspective view of the golf club head of FIG. 7A oriented orthogonal to the striking surface that includes the support area.
11A shows a cross-sectional view of the golf club head of FIG. 7C including an additional embodiment of an elastomeric element.
11B shows a cross-sectional view of the golf club head of FIG. 7C including an additional embodiment of an elastomeric element.
11C shows a cross-sectional view of the golf club head of FIG. 7C including an additional embodiment of an elastomeric element.
11D shows a cross-sectional view of the golf club head of FIG. 7C including an additional embodiment of an elastomeric element.
FIG. 12A shows a periodogram power spectral density estimate for the golf club head shown in FIG. 11A.
FIG. 12B shows a sound power estimate for the golf club head shown in FIG. 11A.
13A shows a periodogram output spectral density estimate for the golf club head shown in FIG. 11D.
FIG. 13B shows an acoustic power estimate for the golf club head shown in FIG. 11D.
14A illustrates a cross-sectional view of an elastomeric element having a larger rear portion than the front portion.
14B illustrates a cross-sectional view of an elastomeric element having a larger rear portion than the front portion.
14C illustrates a cross-sectional view of an elastomeric element having a posterior portion larger than an anterior portion.
14D illustrates a cross-sectional view of an elastomeric element similar to the elastomeric element of FIG. 14A but including a first material and a second material.
14E illustrates a cross-sectional view of an elastomeric element similar to the elastomeric element of FIG. 14B but including a first material and a second material.
14F illustrates a cross-sectional view of an elastomeric element similar to the elastomeric element of FIG. 14C but including a first material and a second material.
FIG. 14G illustrates a cross-sectional view of an elastomeric element similar to the elastomeric element of FIG. 14A but with the center of the front portion offset from the center of the rear portion.
14H illustrates a cross-sectional view of an elastomeric element similar to the elastomeric element of FIG. 14B but with the center of the front portion offset from the center of the rear portion.
FIG. 14I illustrates a cross-sectional view of an elastomeric element similar to the elastomeric element of FIG. 14C but with the center of the front portion offset from the center of the rear portion.
14J illustrates a cross-sectional view of an elastomeric element bottlenecked in diameter between an anterior portion and a posterior portion.
14K illustrates a cross-sectional view of an elastomeric element bottlenecked in diameter between an anterior portion and a posterior portion.
14L illustrates a cross-sectional view of an elastomeric element similar to the elastomeric element of FIG. 14J but including a first material and a second material.
15A shows a rear view of a golf club head.
FIG. 15B shows a perspective view of the golf club head of FIG. 15A.
FIG. 15C shows an additional perspective view of the golf club head of FIG. 15A.
FIG. 15D shows a cross-section EE of the golf club head of FIG. 15A.
FIG. 16 shows a cross-sectional view EE of the golf club head of FIG. 15D without the adjustable driver and elastomeric elements mounted.
FIG. 17A shows a perspective view of the adjusting driver and elastomeric elements of the golf club head of FIG. 15A.
FIG. 17B shows an additional perspective view of the adjusting driver and elastomeric elements of the golf club head of FIG. 15A.
FIG. 17C shows a side view of the adjusting driver and elastomeric elements of the golf club head of FIG. 15A.
Fig. 17d shows a cross-sectional view of the steering driver and elastomeric element of Fig. 17a;
Fig. 17e shows a further perspective view of the cross section of the adjustment driver and elastomeric element of Fig. 17a;
18 shows a rear view of a golf club head.
19 shows an exploded view of the golf club head of FIG. 18;
20 shows a cross-sectional view FF of a golf club head.
21 shows a cross section GG of a golf club head.
22 shows a front view of the golf club head of FIG. 18, including a support area;
23 shows a perspective view of a further embodiment of a golf club head and second deformable member.
FIG. 24 shows the second deformable member shown in FIG. 23 .
25 illustrates a cross-sectional view FF of a golf club head including the second deformable member shown in FIGS. 23 and 24;
26 shows a perspective view of a further embodiment of a golf club head.
27 shows a side view of the golf club head of FIG. 26;
FIG. 28 shows a cross-sectional view HH of the golf club head of FIG. 26 omitting the weight member, second damping element, and first damping element.
FIG. 29 shows a cross-sectional view HH of the golf club head of FIG. 26 omitting the weight member and second damping element.
FIG. 30 shows a cross-sectional view HH of the golf club head of FIG. 26 with weight members omitted.
31 shows a cross-sectional view HH of the golf club head of FIG. 26;
FIG. 32 shows a cross-sectional view (II) of the golf club head of FIG. 27 with weight members omitted.
33 shows a cross-sectional view JJ of the golf club head of FIG. 27;
34 shows a perspective view of the first and second damping elements of the golf club head of FIG. 26;
35 shows additional perspective views of the first and second damping elements of the golf club head of FIG. 26;
36 shows a perspective view of a second damping element of the golf club head of FIG. 26;
37 shows a further perspective view of a second damping element of the golf club head of FIG. 26;
38 shows a perspective view of a further embodiment of a golf club head.
39 shows a side view of the golf club head of FIG. 38;
40 shows a cross-sectional view KK of the golf club head of FIG. 38;
41 shows a cross-sectional view LL of the golf club head of FIG. 38;
Fig. 42 shows a detail of Fig. 41;
FIG. 43 shows a cross-section MM of the golf club head of FIG. 38 with the first damping element omitted.
44 shows a perspective view of a second damping element of the golf club head of FIG. 38;
45 shows a cross-sectional view of a further embodiment of a golf club head.
46 shows a perspective view of the second and third damping elements of the golf club head of FIG. 45;
47 shows a perspective view of a further embodiment of a golf club head.
48 shows a perspective view of a cross section NN of the golf club head of FIG. 47;
49 shows a side view of a cross section NN of the golf club head of FIG. 47;
50 shows a detailed view of the golf club head of FIG. 49;
FIG. 51 shows a perspective view of the golf club head of FIG. 47 with damping elements omitted.
FIG. 52 shows a perspective view of a cross section OO of the golf club head of FIG. 51;
FIG. 53 shows a side view of a cross section OO of the golf club head of FIG. 51;
54 shows a perspective view of a damping element of the golf club head of FIG. 47;
FIG. 55 shows an additional perspective view of the damping elements of the golf club head 1000 of FIG. 47 .
FIG. 56 shows a perspective view of a cross section PP of the damping element of FIG. 54 .
FIG. 57 shows a side view of a cross section PP of the damping element of FIG. 54 .
58 shows a detailed view of the damping element of FIG. 57;
59 shows a perspective view of a further embodiment of a golf club head.
60 shows a side view of section QQ of the golf club head of FIG. 59;
61 illustrates an additional cross-sectional view of the golf club head of FIG. 59 including a golf club shaft and a sixth damping element.
62 shows a cross-sectional view (EE) of the golf club head of FIG. 15A including an additional embodiment of a deformable member.
63 shows a cross-sectional view (EE) of the golf club head of FIG. 15A including an additional embodiment of a deformable member.
64 shows a cross-sectional view (EE) of the golf club head of FIG. 15A including an additional embodiment of a deformable member.
65 shows a cross-sectional view (EE) of the golf club head of FIG. 15A including an additional embodiment of a deformable member.
66 shows the deformable member and adjustment driver of the golf club head of FIG. 62;
67 shows a method of manufacturing a golf club head.
68 shows a perspective view of a golf club head.
FIG. 69 shows a RR cross-sectional view of the golf club head of FIG. 68 omitting weight members.
70 shows a RR cross-sectional perspective view of the golf club head of FIG. 69;
FIG. 71 shows a cross-sectional view SS of the golf club head of FIG. 68 omitting weight members and damping elements.
72 shows a perspective view of the golf club head omitting the striking surface and damping elements.
73 shows an additional perspective view of the golf club head of FIG. 72, again omitting the striking surface and damping elements.

The technology described herein contemplates an iron-type golf club head that includes an elastomeric element to promote a more uniform ball speed across the striking face of the golf club. Traditional thin-faced iron-type golf clubs generally produce less uniform launch rates across the striking face due to increased compliance at the geometric center of the striking face. For example, when a golf club strikes a golf ball, the striking surface of the club deflects and bounces forward, accelerating the golf ball away from the striking surface. This design can lead to large flight for the golf ball when it is hit in the center of the striking surface, whereas any off-center hit of the golf ball will result in significant loss of flight for the golf ball. causes In comparison, an extremely thick surface results in more uniform ball flight regardless of impact location, but causes a significant loss in launch rate. The technology includes an elastomeric element between the back portion of the hollow iron and the back surface of the striking face. By including the elastomeric element, the magnitude of the rate of fire can be reduced for strikes at the center of the striking surface while improving the uniformity of the rate of fire across the striking surface. In some examples, the compression of the elastomeric element between the back portion and the striking surface may also be adjustable so that a golfer or golf club fitter can change the deflection of the striking surface when striking a golf ball.

1A-1B are cross-sectional views illustrating a golf club head 100 having an elastomeric element 102 thereon. 1C shows a cross-sectional perspective view of golf club head 100 . 1A to 1C are described simultaneously. Club head 100 includes a striking surface 118 and a back portion 112 . A cavity 120 is formed between the striking surface 118 and the back portion 112 . An elastomeric element 102 is disposed within the cavity 120 between the striking surface 118 and the rear portion 112 . The posterior portion of the elastomeric element 102 is held in place by the cradle 108 . A cradle 108 is attached to the rear portion 112 of the golf club head 100, and the cradle 108 includes a recess 109 for receiving the rear portion of the elastomeric element 102. The lip of the cradle 108 prevents the elastomeric element 102 from sliding or otherwise moving out of position. The elastomeric element 102 may have a generally frustoconical shape, as shown in FIGS. 1A-1B . In other examples, the elastomeric element 102 may have a cylindrical, spherical, cubic or prismatic shape. The recess 109 of the cradle 108 is formed to substantially conform to the shape of the posterior portion of the elastomeric element 102 . For example, with the frustoconical elastomeric element 102, the recess of the cradle 108 ( 109) is also truncated conical. Cradle 108 may be welded or otherwise attached onto rear portion 112 , or cradle 108 may be formed as part of rear portion 112 during a casting or forging process. Back portion 112 may also be machined to include cradle 108 .

The front portion 103 of the elastomeric element 102 contacts the rear surface 119 of the striking surface 118 . The front portion 103 of the elastomeric element 102 may be held in place on the rear surface 119 of the striking surface 118 by a securing structure such as a flange 110 . Flange 110 projects into cavity 120 from rear surface 119 of striking face 118 . The flange 110 receives the front portion 103 of the elastomeric element 102 to substantially prevent the elastomeric element 102 from sliding along the rear surface 119 of the striking surface 118 . The flange 110 may partially or completely surround the front portion 103 of the elastomeric element 102 . Similar to the cradle 108, the flange 110 is positioned on the front portion 103 of the elastomeric element 102 such that the surface of the front portion 103 of the elastomeric element 102 is in contact with the inner surface of the flange 110. It can be molded to match the shape of. Flange 110 may be welded or otherwise attached to back surface 119 of striking surface 118 . Additionally, the flange 110 may be cast or forged during formation of the striking face 118 . For example, if striking surface 118 is a face insert, flange 110 may be included during a casting or forging process to make the face insert. In another example, flange 110 and striking face 118 may be machined from a thicker faceplate. Alternative anchoring structures other than flange 110 may also be used. For example, two or more posts may be included on the rear surface 119 of the striking surface 118 around the perimeter of the front portion 103 of the elastomeric element 102 . As another example, an adhesive may be used to secure the elastomeric element 102 to the posterior surface 119 of the striking surface 118 . In another embodiment, no securing structure is used, and the elastomeric element 102 is generally in place due to compression of the elastomeric element 102 between the cradle 108 and the posterior surface 119 of the striking surface 118. is maintained on

In the example shown in FIGS. 1A-1C , the elastomeric element 102 is disposed behind the approximate geometric center of the striking surface 118 . In traditional thin golf clubs, hitting at the geometric center of the striking surface 118 results in the largest displacement of the striking surface 118 and therefore the highest ball speed. By placing the elastomer 102 at the geometric center of the striking surface 118, the deflection of the striking surface 118 is reduced at that point, reducing ball speed. However, the portion of striking surface 118 not supported by elastomeric element 102 continues to deflect into cavity 120, which contributes to the speed of the golf ball. As such, a more uniform distribution of ball speed resulting from a ball strike across striking surface 118 from heel to toe may be achieved. In other examples, the elastomeric element 102 may be disposed at other locations within the club head 100 .

The elasticity of the elastomeric element 102 also affects the deflection of the striking surface 118 . For example, a material with a lower modulus of elasticity allows for additional deflection of the striking surface 118, providing a higher maximum ball speed but reducing ball speed uniformity. Conversely, a material with a higher modulus of elasticity is more resistant to deflection of the striking surface 118, providing a lower maximum ball speed but increasing ball speed uniformity. The various types of materials are described below in more detail with reference to Tables 2-3.

The golf club head 100 also includes a sole 105 having a sole channel 104 within a front sole portion 114 and a rear sole portion 116. Sole channel 104 extends along sole 105 of golf club head 100 from a point near the heel to a point near the toe. Although shown as being a hollow channel, to prevent debris from entering cavity 120 , sole channel 104 may be filled or filled with plastic, rubber, polymer, or other material. The sole channel 104 allows for additional deflection of the lower portion of the striking surface 118. By allowing additional deflection of the lower portion of the striking surface 118, increased ball speed is achieved from ball strikes in the lower portion of the striking surface 118, such as ball strikes off the turf. Thus, the elastomeric element 102 and the sole channel 104 in combination with each other provide increased flight distance of the golf ball for turf strikes together with a more uniform ball speed across the striking surface 118 .

2A-2B show cross-sectional views of a golf club head 200 having a striking surface 218 with a thick central portion 222 and an elastomeric element 202 . Golf club head 200 is similar to golf club head 100 described above with reference to FIGS. Do. A thickened portion 222 of striking surface 218 protrudes into cavity 220 . The front portion 203 of the elastomeric element 202 contacts the rear surface 219 of the thick portion 222 . The rear portion of the elastomeric element 202 is received by a recess 209 in the cradle 208, which is attached to the rear portion 212 and substantially the same as the cradle 108 described above with reference to FIGS. 1A-1C. similar. Due to the thickened portion 222 of the striking surface 218, the elastomeric element 202 may be shorter in length than the elastomeric element 102 of FIGS. 1A-1C. Golf club head 200 also includes a sole channel 204 disposed between front sole portion 214 and rear sole portion 216 . In addition, sole channel 204 may be filled or filled with a material that provides benefits similar to those of sole channel 104 described in FIGS. 1A-1C .

3A-3B show cross-sectional views of a golf club head 300 having an elastomeric element 302 and an adjustment mechanism for adjusting compression of the elastomeric element 302. The golf club head 300 includes a striking surface 318 and a backside portion 312, with a cavity 320 formed between the backside portion 312 and the striking surface 318. Similar to the golf club head 100 described above with reference to FIGS. ) to accommodate the front part 303 of. In the example shown in FIGS. 3A-3B , the elastomeric element 302 has a generally cylindrical shape. However, in other examples, the elastomeric element 302 may have a conical, frustoconical, spherical, cubic or prismatic shape.

The golf club head 300 also includes an adjustment mechanism. The adjustment mechanism is configured to adjust the compression of the elastomeric element 302 against the posterior surface 319 of the striking surface 318 . In the embodiment shown in FIGS. 3A-3B , the adjustment mechanism includes an adjustment driver 330 and an adjustment receiver 306 . Adjustment receiver 306 may be a structure having a through-hole into cavity 320, and adjustment driver 330 may be a threaded element or screw, as shown. The through-hole of adjustment receiver 306 includes a threaded inner surface for receiving screw element 330 . Adjustment receiver 306 may be formed as part of the forging or casting process of rear portion 312 or may be machined and tapped subsequent to the forging and casting process. The screw element 330 includes an interface 334 , such as a recess, that contacts or receives the posterior portion of the elastomeric element 302 . The screw element 330 also includes a screw drive 332 which is at least partially external to the golf club head 300 so that the golfer can access the screw drive 332 . When screw element 330 is rotated through screw drive 332 by means of a screwdriver, Allen wrench, or torque wrench, screw element 330 moves further into or out of cavity 320. . In some examples, interface 334 that contacts or receives the posterior portion of elastomeric element 302 may be lubricated to prevent twisting or spinning of elastomeric element 302 when screw element 330 is rotated. can As the screw element 330 moves further into the cavity 320, the compression of the elastomeric element 302 relative to the posterior surface 319 of the striking face 318 increases, thus altering the performance of the elastomeric element 302. let it

The higher compression of the elastomeric element 302 against the posterior surface 319 of the striking surface 318 further limits the deflection of the striking surface 318 . The additional limitation of deflection then results in a more uniform ball speed across the striking surface 318. However, the limitation on deflection also lowers the maximum ball speed from the center of the striking surface 318. By making the compression of the elastomeric element 302 adjustable with an adjustment mechanism, the golfer or golf club-fitting specialist can adjust the compression to meet the golfer's specific needs. For example, a golfer who desires more added maximum distance but does not require uniform ball speed across striking surface 318 may reduce the initial set compression of elastomeric element 302 by loosening threaded element 330. can Conversely, a golfer desiring uniform ball speed across striking surface 318 may tighten threaded element 330 to increase the initial set compression of elastomeric element 302.

The adjustment mechanism is shown as including screw element 330 and threaded through-holes in FIGS. 3A-3B , but adjusts compression of elastomeric element 302 against back surface 319 of strike face 318 . Other adjustment mechanisms may be used to achieve this. For example, the adjustment mechanism may include a lever wherein rotation of the lever alters the compression of the elastomeric element 302 . Additionally, the adjustment mechanism may include a button that can be depressed to directly increase compression of the elastomeric element 302 . Also, other types of adjustment mechanisms may be used.

Golf club head 300 also includes a sole channel 304 between front sole portion 314 and rear sole portion 316, similar to sole channel 104 described above with reference to FIGS. 1A-1C. do. The sole channel 304 also provides benefits similar to those of the sole channel 104, and may also be filled with or filled with a material.

Additionally, golf club head 300 may be produced or sold as a kit. In the illustrated example where the adjustment mechanism is a screw-like screw element 330 , the kit may include a plurality of screw elements 330 . Each threaded element 330 can have a variety of weights, allowing the golfer to select a desired weight. For example, one golfer may prefer an overall lighter weight for the head of the irons, while another golfer may prefer a heavier weight. Also, each of the plurality of screw elements 330 may have different weight distributions. For example, the various screw elements 330 can be configured to distribute the weight of each screw element 330 along its length as needed. Also, the plurality of screw elements 330 may have different lengths. By having different lengths, each screw element 330 can have maximum compression, which can be applied to the elastomeric element 302 . For example, a shorter screw element 330 may not be able to apply a force on the elastomeric element 302 as much as a longer screw element 330 , depending on the configuration of the adjustment receiver 306 . The kit may also include a torque wrench for mounting the screw element 330 to the adjustment receptacle 306 . A torque wrench may include preset settings corresponding to different compression or performance levels.

4A shows a perspective view of another example of a golf club head 400A having an elastomeric element 402 and an adjustment mechanism for adjusting compression of the elastomeric element 402 . 4B shows a cross-sectional view of golf club head 400A. Golf club 400A includes a striking surface 418 and a back portion 412 with a cavity 420 formed therebetween. Similar to the adjustment mechanism of FIGS. 3A-3B , the adjustment mechanism in the golf club head 400A includes an adjustment receiver 406 and an adjustment driver 430 . In the illustrated example, the adjusting receptacle 406 is a structure having a threaded through-hole for receiving the adjusting driver 430, and the adjusting driver 430 is a screw. In some embodiments, adjustment receiver 406 may be formed by a threaded through-hole through rear portion 412 without requiring any additional structure.

The tip of the screw 430 contacts the cradle 408A holding the rear portion of the elastomeric element 402 . As the screw 430 rotates, the lateral movement of the screw 430 causes the cradle 408A to move toward or away from the striking surface 418 . Thus, in some examples, screw 430 extends substantially orthogonal to posterior surface 419 of striking surface 418 . Because the cradle 408A holds the posterior portion of the elastomeric element 402, movement of the cradle 408A causes a change in compression of the elastomeric element 402 relative to the posterior surface 419 of the striking surface 418. . As such, compression of the elastomeric element 402 rotates the screw 430 via the screw drive 432, similar to the manipulation of the screw element 330 within the golf club head 300 shown in FIGS. 3A-3B. can be adjusted by

4C shows a cross-sectional view of another example golf club 400C having an elastomeric element 402 and an adjustment mechanism for adjusting compression of the elastomeric element 402 . Golf club head 400C has a depth D that is greater than the depth of a cradle in which golf club head 400C is relatively smaller (e.g., cradle 408A of FIGS. 4A-4B having depth d). It is substantially similar to the golf club head 400A shown in FIGS. 4A-4B except that it includes a larger cradle 408C with The larger cradle 408C encloses more elastomeric elements 402 than the smaller cradle. By enclosing a larger portion of elastomeric element 402 , cradle 408C further limits deformation of elastomeric element 402 upon strike of a golf ball by golf club head 400C. While limiting the deformation of the elastomeric element 402 may limit the maximum potential deflection of the striking surface 418 and thus reduce the maximum ball speed of the golf club head 400C, the striking surface 418 ) increases the uniformity of the speed across The larger cradle 408C does not contact the posterior surface 419 of the striking surface 418 at maximum deflection. Cradle 408C itself may be made of the same material as rear portion 412, such as steel. Cradle 408C may also be made of titanium, composite, ceramic, or various other materials.

The size of the cradle 408C may be selected based on desired ball speed characteristics. For example, cradle 408C may enclose approximately 25% or more of the volume of elastomeric element 402 , as shown in FIG. 4C . In another example, cradle 408C may enclose between approximately 25% and 50% of the volume of elastomeric element 402 . In another example, cradle 408C may enclose approximately 10% to 25% or less than approximately 10% of the volume of elastomeric element 402 . In another example, cradle 408C may enclose more than 50% of the volume of elastomeric element 402 . For a portion of elastomeric element 402 enclosed by cradle 408C, substantially the entire peripheral surface of that portion of elastomeric element 402 may contact an inner surface of recess 409 of cradle 408C. .

Also, the connection between cradle 408C and steering driver 430 is shown more clearly in FIG. 4C. The tip of the steering driver 430, which may be a flat surface, contacts the back surface 407 of the cradle 408C. Thus, as the adjustment driver 430 moves into the cavity 420, the cradle 408C and the elastomeric element 402 are pressed toward the striking surface 418. Conversely, as the adjustment driver 430 is retracted from the cavity 420, the cradle 408C maintains contact with the adjustment driver 430 due to the applied force from the elastomeric element 402 resulting from its compression. In some embodiments, the surface of the tip of screw 430 and/or the rear surface 407 of cradle 408C may be lubricated to prevent twisting of cradle 408C. In another example, the tip of the tuning driver 430 may be attached to the cradle 408C such that the cradle 408C twists with rotation of the tuning driver 430 . In such an embodiment, the elastomeric element 402 may be substantially cylindrical, conical, spherical, or frustoconical, and the interior 409 of the cradle 408C may be lubricated to prevent twisting of the elastomeric element 402 . In another example, the posterior surface 419 of the striking surface 418 and/or the front surface of the elastomeric element 402 in contact with the posterior surface 419 of the striking surface 418 is the posterior surface of the striking surface 418 ( 419) may be lubricated to allow spinning of the elastomeric element 402.

Although golf club heads 400A and 400C are shown with a continuous sole 414 rather than a sole channel like golf club head 300 of FIGS. 3A-3B , other embodiments of golf club heads 400A and 400C may Can contain channels. Golf club heads 400A and 400C may also be sold as kits with multiple screws and/or torque wrenches, similar to the kit described above for golf club head 300. An additional support plate may be added to the aft portion of golf club heads 400A and 400C, while still leaving a portion of the screws exposed for adjustment.

Simulation results of various types of golf club heads further demonstrate ball speed uniformity across the face of golf club heads that include elastomeric elements. Table 1 shows ball speed retention across the face of the golf club head for several different example golf club heads. Example 1 is a baseline hollow iron with a sole channel and 2.1 mm face thickness. Example 2 is a 2.1 mm faceted hollow iron with a stiff rod extending from the rear portion to the striking face, also including a sole channel. Example 3 is a hollow iron with a striking face that also has a sole channel and has a thick center (6.1 mm) and thin periphery (2.1 mm). Example 4 is a golf club head having an elastomeric element similar to golf club head 100 shown in FIGS. 1A-1C. The “Center” row represents the ball speed resulting from a strike at the center of the golf club head, and the “½” Heel row represents the ball speed from a strike 1/2 inch from the center of the club head towards the heel. The "½" toe row represents the loss of ball speed from hitting 1/2 inch from the center of the club head towards the toe. All values in Table 1 are in miles per hour (mph).

[Table 1]

From the results in Table 1, the golf club head with the elastomer (Example 4) exhibits relatively high ball speed from the center of the face while providing reduced loss of ball speed from hitting near the toe or heel of the golf club.

Also, as noted above, the type of material used in any elastomeric element described herein affects the displacement of the striking surface. For example, an elastomeric element with a greater modulus of elasticity will resist compression of the striking surface and consequent deflection, which will lead to lower ball speeds. For example, for a golf club head similar to golf club head 400A, Table 2 shows the ball speeds achieved by using materials with different elastic properties. All ball speeds were the result of hitting the center of the plane.

[Table 2]

From the results in Table 2, the selection of materials for the elastomeric elements can be used to fine-tune the performance of the golf club. All of the materials listed in Table 2 can be used to form the elastomeric elements used in the present technology.

Also, different types of materials affect ball speed retention across the striking surface. For example, for a golf club head similar to golf club head 400A, Table 3 shows the ball speed achieved across the striking surface from heel to toe for the different materials used as the elastomeric element. The materials referenced in Table 3 are the same materials as in Table 2. All speeds in Table 3 are in mph.

[Table 3]

From the results in Table 3, it can be seen that materials with higher modulus of elasticity provide better ball speed retention across the striking surface, but the maximum ball speed for impact at the center of the surface is lost. For some applications, a range of modulus of elasticity for the elastomeric element from about 4 to about 15 GPa may be used. In other applications, a range of modulus of elasticity for the elastomeric element from about 1 to about 40 or about 50 GPa may be used.

Also, as discussed above with reference to FIGS. 4A-4C, the size of the cradle can affect ball speed. For a smaller cradle, such as cradle 408A of FIGS. 4A-4B and an elastomeric element made of 13 GPa material, a loss of about 0.2 mph to center impact is observed compared to the same club without the elastomeric element. For a larger cradle that is about 5 mm deeper, e.g., cradle 408C in FIG. 4C and also with elastomeric elements made of 13 GPa material, a loss of about 0.4 mph to center impact is observed compared to the same club without the elastomeric elements. do. For the same larger cradle and elastomeric element made of 0.4 GPa material, a loss of only about 0.2 mph to center impact is observed compared to the same club without the elastomeric element.

San Diego Plastics, Inc. of National City, Calif., offers several plastics with modulus of elasticity ranging from 2.6 GPa to 13 GPa, all of which are usable. Additionally, the plastic has a usable yield strength in the golf club heads described herein. Table 4 lists several materials provided by San Diego Plastics and their respective Young's modulus and yield strength values.

[Table 4]

Additionally, the inclusion of the elastomeric element provides a benefit in terms of durability to the club face by reducing the stress value exhibited by the striking face upon impact with a golf ball. 5A shows a stress contour plot for a golf club head 500A without elastomeric elements, and FIG. 5B shows a stress contour plot for a golf club head 500B with elastomeric elements. In golf club head 500A, the von Mises stress at center of face 502A is approximately 68% of the maximum equivalent stress occurring at bottom face edge 504A. Without the elastomeric element, the stress level is high, indicating that the club face may be prone to breakage and/or premature deterioration. In golf club 500B, for an elastomeric element with a modulus of elasticity of 0.41 GPa, the equivalent stress on the face near the edge 502B of the elastomeric element is reduced by about 16%, and the The maximum equivalent stress is reduced by about 18%. This equivalent stress is still relatively high, but is significantly reduced from the stress in the golf club head 500A. For a golf club head 500B with an elastomeric element having a modulus of elasticity of about 13 GPa, the equivalent stress on the face near the edge 502B of the elastomeric element is reduced by about 50%, and the bottom face edge 504B The maximum equivalent stress occurring at is reduced by about 56%. These equivalent stress values are low, indicating a more durable golf club head that may be less likely to fail.

6A-6E show a golf club head 600 having an elastomeric element 602. 6A shows a front view of a golf club head 600 . FIG. 6B shows a toe view of the golf club head 600 of FIG. 6A. FIG. 6C shows a cross-sectional view A-A of the golf club head 600 of FIG. 6A. FIG. 6D shows a perspective view of the golf club head 600 of FIG. 6A oriented perpendicular to striking surface 618 . FIG. 6E shows a perspective view of the golf club head 600 of FIG. 6A oriented perpendicular to the striking surface 618 that includes the support area 642 . The golf club head 600 includes a striking surface 618 configured to strike a ball, a sole 605 located on the bottom of the golf club head 600, and a rear portion 612.

As shown in FIGS. 6A and 6B , the golf club head 600 includes a coordinate system centered at the center of gravity (CG) of the golf club head 600 . The coordinate system includes a y-axis extending perpendicularly perpendicular to the horizon when the golf club head 600 is at a lie and loft (α) defined at the address location. The coordinate system includes an x-axis that is orthogonal to the y-axis and parallel to striking surface 618 and extends toward the heel of golf club head 600 . The coordinate system includes a y-axis and a z-axis that is orthogonal to the x-axis and extends through striking surface 618 . The golf club head 600 has a rotational moment of inertia about the y-axis (MOI-Y), a value representing the resistance of the golf club head to angular acceleration about the y-axis.

An elastomeric element 602 is disposed between the striking surface 618 and the rear portion 612 . Striking surface 618 includes a posterior surface 619 . The front portion 603 of the elastomeric element 602 contacts the rear surface 619 of the striking surface 618 . As shown in FIGS. 6C and 6E , striking surface 618 includes a support area 642 , and that portion of posterior surface 619 is supported by elastomeric element 602 , which strikes surface 618 ) is defined as the area inside the support area periphery 640 formed by the outer extent of the front portion 603 of the elastomeric element 602 that contacts the rear surface 619 of the elastomeric element 602 . The support area 642 is shown hatched in FIG. 6E. Support area 642 would normally not be visible from the front of golf club head 600, but has been added for illustrative purposes.

The striking surface 618 includes a striking surface region 652, which is defined as an area inside the striking surface periphery 650, as shown in FIG. 6D. As shown in FIG. 6C , the perimeter of the striking surface is delineated by upper bound 654 and lower bound 656 . The cap 654 is located at the intersection of the substantially flat rear surface 619 with an upper radius 655 extending to the top line of the golf club head 600 . The lower limit 656 is located at the intersection of the substantially flat rear surface 619 with a lower radius 657 extending into the sole 605 of the golf club head 600. The striking face perimeter is similarly delineated (658) at the toe (not shown in cross section) of the golf club head 600 (as shown in FIG. 6D). The heel portion around the striking surface is a plane (659 ) is formed by The striking surface area 652 is shown hatched in FIG. 6D. The limits 654 and 656 perimeter of the striking surface have been projected onto striking surface 618 in FIG. 6D for ease of illustration and understanding.

A plurality of golf club heads very similar to golf club head 600 described herein may be included in a set, each golf club head having a different loft (a). Additionally, each golf club head may have additional variable characteristics that may include, for example, MOI-Y, striking surface area, area of support area, and non-support area percentage. The unsupported surface percentage is calculated by dividing the area of the support area by the striking surface area, multiplying by 100% and subtracting it from 100%. An example set of iron-type golf club heads is included in Table 5 below. The set in Table 5 includes the following lofts: 21, 24, 27, and 30. Other sets may include a larger number of golf club heads and/or a wider range of loft (α) values, or a smaller number of golf club heads and/or a smaller range of loft (α) values. Additionally, the set may include one or more golf club heads that include elastomeric elements and one or more golf club heads that do not include elastomeric elements.

[Table 5]

An example of a further embodiment of an iron-type golf club head set is included in Table 6 below.

[Table 6]

If all other properties are held constant, the ball speed of an off-center hit increases as the MOI-Y value increases. For clubs with smaller MOI-Y, off-center ball speed reduction can be mitigated by a larger unsupported surface percentage. By supporting a smaller percentage of the face, more of the face can flex during impact, which increases off-center ball speed. Thus, for the set of golf clubs of the present invention described in Table 5 above, MOI-Y increases throughout the set as loft (α) increases, and the unsupported surface percentage increases above the loft (α) increase. Decreases through sets. This relationship creates a consistent off-center ball speed through a set of golf clubs.

The set of golf clubs may include a first golf club head having a loft of greater than 20 degrees and less than or equal to 24 degrees, and a second golf club head having a loft of greater than or equal to 28 degrees and less than or equal to 32 degrees. In one embodiment, the set may be configured such that the first golf club head has a greater free surface percentage than the second golf club head and the first golf club head has a lower MOI-Y than the second golf club head.

More specific characteristics of the embodiments described herein are discussed below. In some embodiments, the area of the support region may be greater than 30 mm ² . In some embodiments, the area of the support region may be greater than 40 mm ² . In some embodiments, the area of the support region may be greater than 60 mm ² . In some embodiments, the area of the support region may be greater than 65 mm ² . In some embodiments, the area of the support region may be greater than 70 mm ² . In some embodiments, the area of the support region may be greater than 73 mm ² .

In some embodiments, the area of the support region may be less than 140 mm ² . In some embodiments, the area of the support region may be less than 130 mm ² . In some embodiments, the area of the support region may be less than 120 mm ² . In some embodiments, the area of the support region may be less than 110 mm ² . In some embodiments, the area of the support region may be less than 100 mm ² . In some embodiments, the area of the support region may be less than 90 mm ² . In some embodiments, the area of the support region may be less than 85 mm ² . In some embodiments, the area of the support region may be less than 80 mm ² . In some embodiments, the area of the support region may be less than 75 mm ² .

In some embodiments, the unsupported surface percentage is greater than 70%. In some embodiments, the unsupported surface percentage is greater than 75%. In some embodiments, the unsupported surface percentage is greater than 80%. In some embodiments, the unsupported surface percentage is greater than 85%. In some embodiments, the unsupported surface percentage is greater than 90%. In some embodiments, the unsupported surface percentage is greater than 95%. In some embodiments, the unsupported surface percentage is greater than 96%. In some embodiments, the unsupported surface percentage is greater than 97%.

In some embodiments, the unsupported surface percentage is less than 99.75%. In some embodiments, the unsupported surface percentage is less than 99.50%. In some embodiments, the unsupported surface percentage is less than 99.25%. In some embodiments, the unsupported surface percentage is less than 99.00%. In some embodiments, the unsupported surface percentage is less than 98.75%. In some embodiments, the unsupported surface percentage is less than 98.50%. In some embodiments, the unsupported surface percentage is less than 98.25%. In some embodiments, the unsupported surface percentage is less than 98.00%. In some embodiments, the unsupported surface percentage is less than 97.75%. In some embodiments, the unsupported surface percentage is less than 97.50%. In some embodiments, the unsupported surface percentage is less than 97.25%. In some embodiments, the unsupported surface percentage is less than 97.00%.

7A-10 show a golf club head 700 having an elastomeric element 702. 7A shows a perspective view of a golf club head 700. FIG. 7B shows an additional perspective view of the golf club head 700 of FIG. 7A. FIG. 7C shows a rear view of the golf club head 700 of FIG. 7A. FIG. 8A shows a cross-sectional view B-B of the golf club head 700 of FIG. 7C. FIG. 8B shows a cross-sectional view C-C of the golf club head 700 of FIG. 7C. FIG. 8C shows cross-sectional views D-D of the golf club head 700 of FIG. 7C. FIG. 9A shows an additional cross-sectional view of the front of the golf club head 700 of FIG. 7A with the striking surface omitted. FIG. 9B shows a cross-sectional view from FIG. 9A with the elastomeric element removed. FIG. 10 shows a perspective view of the golf club head 700 of FIG. 7A oriented perpendicular to the striking surface 718 that includes the support area 742 . It should be noted that although the golf club head 700 shown in FIGS. 7A-10 is an iron-type hollow back golf club, the invention described herein may be applied to other types of golf club heads as well.

The golf club head 700 includes a deformable member 702 disposed between a striking surface 718 and a back portion 712 . In one embodiment, deformable member 702 is formed from an elastomer. The front portion 703 of the elastomeric element 702 contacts the rear surface 719 of the striking surface 718 . Striking surface 718 includes a support area 742 and that portion of posterior surface 719 is supported by elastomeric element 702, which is elastomeric in contact with posterior surface 719 of striking surface 718. Defined as the area inside the perimeter 740 of the support area formed by the outer extent of the front portion 703 of element 702. Support area 742 would normally not be visible from the front of golf club head 700, but has been added to FIG. 10 for illustrative purposes.

The golf club head 700 shown in FIGS. 7A-10 is a hollow backside structure and includes a peripheral portion 701 surrounding a striking surface 718 and extending rearwardly therefrom. Perimeter portion 701 includes sole 705 , toe 706 and topline 707 . In addition, the peripheral portion 701 may include a weight pad 710 . Golf club head 700 also includes a rear portion 712 configured to support elastomeric element 702 .

Rear portion 712 includes a cantilever support arm 762 attached to peripheral portion 701 . The support arm 762 can include a cradle 708 configured to hold the elastomeric element 702 in place. Cradle 708 may include a lip 709 configured to position elastomeric element 702 on cradle 708 and relative to striking surface 718 . Lip 709 may surround a portion of elastomeric element 702 . Additionally, an adhesive may be used between the elastomeric element 702 and the cradle 708 to secure the elastomeric element 702 to the cradle 708 .

Support arm 762 extends toward support area 742 from weight pad 710 located at the intersection of sole 705 and toe 706 of peripheral portion 701 . The support arm 762 is oriented substantially parallel to the posterior surface 719 of the striking surface 718 . The support arm 762 can include a rib 764 to increase the stiffness of the support arm 762 . A rib 764 may extend rearwardly from the support arm 762 substantially orthogonal to the posterior surface 719 of the striking surface 718 . One benefit of the cantilever support arm 762 is to provide a lower CG height than alternative beam designs, such as the embodiment shown in FIG. 4A, supported at both ends by peripheral portions.

To provide a low CG height, the support arm 762 is cantilevered, meaning that it is attached to the peripheral portion 701 at only one end of the support arm 762 . The support arm is optimized while minimizing the distance H between the highest part of the support arm 762 and the horizontal plane GP when the golf club head 700 is in the address position, as shown in FIG. 8C. It is designed to position the elastomeric element 702 in position. In one embodiment, H is less than or equal to 50 mm. In a further embodiment, H is less than 45 mm. In a further embodiment, H is less than or equal to 40 mm. In a further embodiment, H is less than or equal to 35 mm. In a further embodiment, H is less than or equal to 30 mm. In a further embodiment, H is less than or equal to 29 mm. In a further embodiment, H is less than or equal to 28 mm.

In one embodiment, the golf club head 700 may have a CG height (CGH) of 25 mm or less. In a further embodiment, the golf club head 700 may have a CG height (CGH) of 24 mm or less. In a further embodiment, the golf club head 700 may have a CG height (CGH) of 23 mm or less. In a further embodiment, the golf club head 700 may have a CG height (CGH) of 22 mm or less. In a further embodiment, the golf club head 700 may have a CG height (CGH) of 21 mm or less. In a further embodiment, the golf club head 700 may have a CG height (CGH) of 20 mm or less. In a further embodiment, the golf club head 700 may have a CG height (CGH) of 19 mm or less. In a further embodiment, the golf club head 700 may have a CG height (CGH) of 18 mm or less.

Another advantage to the illustrated support arm 762 is that due to its orientation, it provides a high MOI-Y. By concentrating the mass at the heel and toe ends of the golf club head 700, the MOI-Y can be increased. The support arm 762 is angled to concentrate most of the mass near the toe 706, which increases the MOI-Y relative to the more centered rear portion on the golf club head 700. In one embodiment, the MOI-Y of the golf club head 700 is greater than 200 kg-mm ² . In a further embodiment, the MOI-Y of the golf club head 700 is equal to or greater than 210 kg-mm ² . In a further embodiment, the MOI-Y of the golf club head 700 is greater than 220 kg-mm ² . In a further embodiment, the MOI-Y of the golf club head 700 is greater than 230 kg-mm ² . In a further embodiment, the MOI-Y of the golf club head 700 is greater than 240 kg-mm ² . In a further embodiment, the MOI-Y of the golf club head 700 is greater than 250 kg-mm ² . In a further embodiment, the MOI-Y of the golf club head 700 is equal to or greater than 260 kg-mm ² . In a further embodiment, the MOI-Y of the golf club head 700 is equal to or greater than 270 kg-mm ² .

The support arm 762 is oriented parallel to the posterior surface 719 of the striking surface 718 and extends from the peripheral portion 701 towards the support area 742, as shown in FIG. 8A. An arm centerline (CL) extending along the center may be included. The angle α is measured between the horizontal plane GP and the center line CL. In one embodiment, angle α is greater than or equal to 5 degrees and less than or equal to 45 degrees. In a further embodiment, angle α is greater than or equal to 10 degrees and less than or equal to 40 degrees. In a further embodiment, angle α is equal to or greater than 15 degrees and equal to or less than 35 degrees. In a further embodiment, angle α is greater than or equal to 20 degrees and less than or equal to 30 degrees. In a further embodiment, angle α is greater than or equal to 23 degrees and less than or equal to 28 degrees.

The support arm 762 may have an arm width AW measured perpendicular to the arm centerline CL and parallel to the back surface 719 of the striking surface 718 . Arm width AW can vary along the length of support arm 762 . In one embodiment, the arm width of at least a portion of the support arm is greater than or equal to 6 mm. In a further embodiment, the arm width of at least a portion of the support arm is equal to or greater than 8 mm. In a further embodiment, the arm width of at least a portion of the support arm is greater than or equal to 10 mm.

The support arm 762 may have an arm thickness AT measured perpendicular to the back surface 719 of the strike surface 718 . Arm thickness AT may vary along the length of support arm 762 . In one embodiment, the arm thickness (AT) of at least a portion of the support arm is equal to or greater than 2 mm. In a further embodiment, the arm thickness AT of at least a portion of the support arm is greater than or equal to 3 mm. In a further embodiment, the arm thickness AT of at least a portion of the support arm is greater than or equal to 4 mm. In a further embodiment, the arm thickness AT of at least a portion of the support arm is greater than or equal to 5 mm. In a further embodiment, the arm thickness AT of at least a portion of the support arm is equal to or greater than 6 mm.

The rib 764 of the support arm 762 may have a rib width RW measured parallel to the back surface 719 of the striking surface 718 and orthogonal to the arm centerline CL. The rib width (RW) may vary along the length of the rib. In one embodiment, the rib width (RW) of at least a portion of the rib is greater than 1 mm. In a further embodiment, the rib width RW of at least a portion of the rib is greater than 2 mm. In a further embodiment, the rib width (RW) of at least a portion of the rib is greater than or equal to 3 mm. In a further embodiment, the rib width RW of at least a portion of the rib is greater than 4 mm.

The rib 764 of the support arm 762 may have a rib thickness RT measured perpendicular to the back surface 719 of the striking surface 718 . The rib thickness (RT) may vary along the length of the rib. In one embodiment, the rib thickness (RT) of at least a portion of the rib is greater than or equal to 2 mm. In a further embodiment, the rib thickness (RT) of at least a portion of the rib is greater than or equal to 3 mm. In a further embodiment, the rib thickness (RT) of at least a portion of the rib is greater than or equal to 4 mm. In a further embodiment, the rib thickness (RT) of at least a portion of the rib is greater than or equal to 5 mm. In a further embodiment, the rib thickness (RT) of at least a portion of the rib is greater than or equal to 6 mm.

The support area 742 is specifically positioned on the posterior surface 719 of the striking surface 718 as shown in FIG. 10 . The striking surface heel reference plane 759 extends parallel to the y-axis and the x-axis and is offset 1 mm toward the heel from the heel end of the scoreline 760 formed on the striking surface 718. The geometric center 743 of the support area 742 is the striking surface heel reference plane 759 measured parallel to the striking surface 718 and parallel to the horizontal plane GP with the golf club head 700 in the address position. ) is located at the support area offset length SROL towards the toe. In one embodiment, the support region offset length (SROL) is greater than or equal to 20 mm. In a further embodiment, the support region offset length (SROL) is equal to or greater than 22 mm. In a further embodiment, the support region offset length (SROL) is equal to or greater than 24 mm. In a further embodiment, the support region offset length (SROL) is equal to or greater than 26 mm. In a further embodiment, the support region offset length (SROL) is equal to or greater than 27 mm. In a further embodiment, the support region offset length (SROL) is equal to or greater than 28 mm.

The striking surface length (SFL) is measured from the striking surface heel reference plane 759 to the striking surface ( 718) to the toe end. In one embodiment, the striking surface length (SFL) is greater than 60 mm. In a further embodiment, the striking surface length (SFL) is greater than or equal to 65 mm. In a further embodiment, the striking surface length (SFL) is greater than or equal to 70 mm. In a further embodiment, the striking surface length (SFL) is greater than or equal to 71 mm. In a further embodiment, the striking surface length (SFL) is greater than or equal to 72 mm. In a further embodiment, the striking surface length (SFL) is greater than or equal to 73 mm. In a further embodiment, the striking surface length (SFL) is greater than or equal to 74 mm.

In one embodiment, the support area offset ratio, defined as the support area offset length (SROL) divided by the striking surface length (SFL) and multiplied by 100%, is equal to or greater than 40%. In a further embodiment, the support area offset ratio is greater than 41%. In a further embodiment, the support area offset ratio is greater than 42%. In a further embodiment, the support area offset ratio is greater than 43%. In a further embodiment, the support area offset ratio is greater than 44%. In a further embodiment, the support area offset ratio is greater than 45%. In a further embodiment, the support area offset ratio is greater than 46%. In a further embodiment, the support area offset ratio is greater than 47%. In a further embodiment, the support area offset ratio is greater than 48%. In a further embodiment, the support area offset ratio is greater than 49%. In a further embodiment, the support area offset ratio is greater than 50%. In a further embodiment, the support area offset ratio is greater than or equal to 51%.

An additional benefit of including the support area 742 is the ability to utilize a thin striking surface. In the illustrated embodiment, striking surface 718 has a constant thickness. In other embodiments, the striking surface may have a variable thickness. In one embodiment, the thickness of the striking surface is less than or equal to 2.5 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 2.4 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 2.3 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 2.2 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 2.1 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 2.0 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 1.9 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 1.8 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 1.7 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 1.6 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 1.5 mm. In a further embodiment, the thickness of the striking surface is less than or equal to 1.4 mm.

11A-11D show the golf club head 700 of FIG. 7A with an additional embodiment of an elastomeric element 702. 11A shows a cross-sectional view of a golf club head 700 that includes an additional embodiment of an elastomeric element 702. The elastomeric element 702 of FIG. 11A is circular, similar to the embodiment shown in FIG. 7A. The front portion 703 of the elastomeric element 702 abutting the rear surface 719 of the striking surface 718 has a front diameter FD, and the rear portion 744 abutting the cradle 708 has a rear diameter RD). The front diameter FD is substantially similar to or equal to the rear diameter RD of the elastomeric element 702 shown in FIG. 11A .

11B is a cross-sectional view of a golf club head 700 that includes an additional embodiment of an elastomeric element 702. The elastomeric element 702 of FIG. 11B is circular. The front diameter (FD) is greater than the posterior diameter (RD) of the elastomeric element 702 shown in FIG. 11B. The posterior portion 744 of the elastomeric element 702 in contact with the cradle 708 has a posterior support region 747 having an area.

11C shows a cross-sectional view of a golf club head 700 that includes an additional embodiment of an elastomeric element 702. The elastomeric element 702 of FIG. 11C is circular. The front diameter (FD) is greater than the posterior diameter (RD) of the elastomeric element 702 shown in FIG. 11C.

11D shows a cross-sectional view of a golf club head 700 that includes an additional embodiment of an elastomeric element 702. The elastomeric element 702 of FIG. 11D is circular. The front diameter (FD) is greater than the posterior diameter (RD) of the elastomeric element 702 shown in FIG. 11D. The posterior portion 744 also has a constant diameter region 745 aft of a tapered region 746 extending toward the striking surface 718 . In one embodiment, the posterior diameter (RD) is approximately 12.5 mm and the anterior diameter (FD) is approximately 18.5 mm.

The enlarged front portion 703 and thus enlarged support area 742 provided by the embodiment of the elastomeric element 702 shown in FIGS. 11B, 11C and 11D provide advantages. These advantages include more consistent off-center ball velocities, especially reduced acoustic energy above 3800 Hz.

In one embodiment, the area of the support region may be greater than 75 mm ² . In a further embodiment, the area of the support region may be greater than 100 mm ² . In a further embodiment, the area of the support region may be greater than 125 mm ² . In a further embodiment, the area of the support region may be greater than 150 mm ² . In a further embodiment, the area of the support region may be greater than 175 mm ² . In a further embodiment, the area of the support region may be greater than 200 mm ² . In a further embodiment, the area of the support region may be greater than 225 mm ² . In a further embodiment, the area of the support region may be greater than 250 mm ² . In a further embodiment, the area of the support region may be greater than 255 mm ² . In a further embodiment, the area of the support region may be greater than 260 mm ² . In a further embodiment, the area of the support region may be greater than 50 mm ² and less than 1000 mm ² . In a further embodiment, the area of the support region may be greater than 100 mm ² and less than 1000 mm ² . In a further embodiment, the area of the support region may be greater than 150 mm ² and less than 1000 mm ² . In a further embodiment, the area of the support region may be greater than 200 mm ² and less than 1000 mm ² . In a further embodiment, the area of the support region may be greater than 250 mm ² and less than 1000 mm ² .

In one embodiment, the ratio of the anterior diameter (FD) divided by the posterior diameter (RD) is greater than 1.2. In a further embodiment, the ratio of the anterior diameter (FD) divided by the posterior diameter (RD) is greater than 1.4. In a further embodiment, the ratio of the anterior diameter (FD) divided by the posterior diameter (RD) is greater than 1.6. In a further embodiment, the ratio of the anterior diameter (FD) divided by the posterior diameter (RD) is greater than 1.8. In a further embodiment, the ratio of the anterior diameter (FD) divided by the posterior diameter (RD) is greater than 2.0. In a further embodiment, the ratio of the anterior diameter (FD) divided by the posterior diameter (RD) is greater than 3.0. In a further embodiment, the ratio of the anterior diameter (FD) divided by the posterior diameter (RD) is greater than 4.0.

In one embodiment, the area of support area 742 is larger than the area of rear support area 747 . In one embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 1.2. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 1.4. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 1.6. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 1.8. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 2.0. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 2.5. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 3.0. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 3.5. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 4.0. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 5.0. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 6.0. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 7.0. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 8.0. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 9.0. In a further embodiment, the ratio of the support area 742 divided by the area of the posterior support area 747 is greater than 10.0.

The contact energy absorption factor is defined as the ratio of the front diameter (FD) divided by the diameter of the golf ball, which is approximately 42.75 mm. In one embodiment, the contact energy absorption factor is greater than 0.1. In a further embodiment, the contact energy absorption factor is greater than 0.2. In a further embodiment, the contact energy absorption factor is greater than 0.3. In a further embodiment, the contact energy absorption factor is greater than 0.4. In a further embodiment, the contact energy absorption factor is greater than 0.5. In a further embodiment, the contact energy absorption factor is greater than 0.6. In a further embodiment, the contact energy absorption factor is greater than 0.7. In a further embodiment, the contact energy absorption factor is greater than 0.8. In a further embodiment, the contact energy absorption factor is greater than 0.9. In a further embodiment, the contact energy absorption factor is greater than 1.0. In a further embodiment, the contact energy absorption factor is less than 0.2. In a further embodiment, the contact energy absorption factor is less than 0.3. In a further embodiment, the contact energy absorption factor is less than 0.4. In a further embodiment, the contact energy absorption factor is less than 0.5. In a further embodiment, the contact energy absorption factor is less than 0.6. In a further embodiment, the contact energy absorption factor is less than 0.7. In a further embodiment, the contact energy absorption factor is less than 0.8. In a further embodiment, the contact energy absorption factor is less than 0.9. In a further embodiment, the contact energy absorption factor is less than 1.0.

In further embodiments, the elastomeric element 702 may be non-circular. It may have additional shapes that may include squares, rectangles, octagons, and the like.

Acoustic testing was performed on the same golf club head with different elastomeric elements to determine the effectiveness of the different embodiments of the elastomeric elements. Testing was conducted with each club head striking a Titleist ProV1 golf ball at a club head speed of approximately 95 miles per hour of impact. The acoustic characteristics of the embodiment shown in FIGS. 11A and 11D were recorded as each golf club head struck a golf ball. 12A and 12B reflect the recording of a golf club head using the cylindrical elastomeric element embodiment shown in FIG. 11A striking a golf ball, and FIGS. 13A and 13B reflect the recording of the tapered elastomeric element shown in FIG. Reflects the writing of golf club heads using elastomeric element embodiments. 12A shows a periodogram power spectral density estimate of the cylindrical embodiment of FIG. 11A. FIG. 12B shows a sound power estimate of the cylindrical embodiment of FIG. 11A. 13A shows a periodogram output spectral density estimate of the tapered embodiment of FIG. 11D. Figure 13b shows the acoustic power estimate of the tapered embodiment of Figure 11d.

As shown in FIGS. 12A and 12B , the dominant frequency for the cylindrical elastomeric element 702 of FIG. 11A is 4,279.7 HZ. As shown in FIGS. 13A and 13B , the dominant frequency for the tapered elastomeric element 702 of FIG. 11D is 4317.4 Hz. Generally, when an iron-type golf club head strikes a golf ball, acoustic frequencies produced between approximately 1,000 Hz and 3,800 Hz are generated by golf club and golf ball interaction and golf ball resonance, while approximately 3,800 Hz Acoustic frequencies in excess of h are produced only by the golf club head. Thus, the first acoustic power peak of the acoustic power estimate graphs of FIGS. 12B and 13B correlates essentially with the golf ball, and subsequent acoustic power peaks correlate with the vibration of the striking face of the golf club head. As shown in FIGS. 12B and 13B , the peak acoustic power estimate below 3,800 Hz, corresponding to a golf ball, is approximately 1.00 x 10 ^-3 Watts. As shown in FIG. 12B , the acoustic power produced by a golf club head using the cylindrical elastomeric element embodiment shown in FIG. 11A peaks at approximately 1.40×10 ⁻³ Watts. As shown in FIG. 13B , the acoustic power produced by a golf club head using the tapered elastomeric element embodiment shown in FIG. 11D peaks at approximately 1.04×10 ⁻³ Watts. The sound power level directly correlates to the loudness of the sound produced by the golf club striking the golf ball. Thus, it is apparent that the sound produced by a golf club head using the cylindrical elastomeric element embodiment shown in FIG. 11A is significantly less loud than a golf club head using the tapered elastomeric element embodiment shown in FIG. 11D.

Further, the acoustic power produced by a golf club head using the cylindrical elastomeric element embodiment shown in FIG. 11A divided by the acoustic power produced by the golf ball is approximately 1.40. The acoustic power produced by a golf club head using the cylindrical elastomeric element embodiment shown in FIG. 11D divided by the acoustic power produced by the golf ball is approximately 1.04. In some embodiments, it is preferred that the acoustic power produced by the golf club head divided by the acoustic power produced by the golf ball be less than 1.50. In some embodiments, it is desirable to ensure that the acoustic power produced by the golf club head divided by the acoustic power produced by the golf ball is less than 1.40. In some embodiments, it is desirable to ensure that the acoustic power produced by the golf club head divided by the acoustic power produced by the golf ball is less than 1.30. In some embodiments, it is desirable to ensure that the acoustic power produced by the golf club head divided by the acoustic power produced by the golf ball is less than 1.20. In some embodiments, it is desirable to ensure that the acoustic power produced by the golf club head divided by the acoustic power produced by the golf ball is less than 1.10. In some embodiments, it is desirable to ensure that the acoustic power produced by the golf club head divided by the acoustic power produced by the golf ball is less than 1.00.

14A-14L show a further embodiment of an elastomeric element 702, which may also be referred to as a deformable member. This embodiment is designed with variable compressive stiffness, spring rate, or flexural modulus. This can be achieved through a combination of different geometries as well as different co-molded materials of different durometer.

FIG. 14A shows a cross-sectional view of an elastomeric element 702 with a posterior portion 744 being larger than an anterior portion 702 . Front portion 702 and rear portion 744 are substantially planar. FIG. 14B shows a cross-sectional view of an elastomeric element 702 with a posterior portion 744 being larger than an anterior portion 702 . The posterior portion 744 is substantially planar and the anterior portion 702 is hemispherical. 14C shows a cross-sectional view of an elastomeric element 702 in which the posterior portion 744 is larger than the anterior portion 702. The elastomeric element 702 includes an anterior constant diameter region 746 and a posterior constant diameter region 745, wherein the posterior constant diameter region 746 has a larger diameter than the anterior constant diameter region 745. FIG. 14D shows a cross-sectional view of an elastomeric element 702 similar to the elastomeric element of FIG. 14A but including a first material 770 and a second material 780 . In one embodiment, the first material 770 may be stiffer than the second material 780 . In further embodiments, second material 780 may be more rigid than first material 770 . FIG. 14E is a cross-sectional view of an elastomeric element 702 similar to the elastomeric element of FIG. 14B but including a first material 770 and a second material 780 . FIG. 14F shows a cross-sectional view of an elastomeric element 702 similar to the elastomeric element of FIG. 14C but including a first material 770 and a second material 780 .

FIG. 14G shows a cross-sectional view of an elastomeric element 702 similar to the elastomeric element of FIG. 14A but with the center of the front portion 703 offset from the center of the rear portion 744 . The offset may be toward the topline, toward the sole, toward the toe, toward the heel, or any combination thereof. FIG. 14H shows a cross-sectional view of an elastomeric element 702 similar to the elastomeric element of FIG. 14B but with the center of the front portion 703 offset from the center of the rear portion 744 . FIG. 14I shows a cross-sectional view of an elastomeric element 702 similar to the elastomeric element of FIG. 14C but with the center of the front portion 703 offset from the center of the rear portion 744 . 14J shows a cross-sectional view of an elastomeric element 702 bottlenecked in diameter between an anterior portion 703 and a posterior portion 744 . 14K shows a cross-sectional view of an elastomeric element 702 bottlenecked in diameter between an anterior portion 703 and a posterior portion 744. FIG. 14L shows a cross-sectional view of an elastomeric element 702 similar to the elastomeric element of FIG. 14J but including a first material 770 and a second material 780 .

Any of the embodiments of the elastomeric element 702 described herein may be inverted such that the posterior portion 744 abuts the posterior surface of the striking surface instead of the anterior portion. Also, the embodiment shown in FIGS. 14A-14L is circular in front view in a preferred embodiment. In other embodiments, the elastomeric elements may include different shapes. In some embodiments, the flexural modulus of the first material may be greater than the flexural modulus of the second material.

15A-15D show a golf club head 800 having an elastomeric element 702. 15A shows a rear view of a golf club head 800. FIG. 15B shows a perspective view of the golf club head 800 of FIG. 15A. FIG. 15C shows a further perspective view of the golf club head 800 of FIG. 15A. FIG. 15D shows a cross section E-E of the golf club head 800 of FIG. 15A. FIG. 16 shows cross-sectional views E-E of the golf club head 800 of FIG. 15D without the adjustable driver 830 and elastomeric element 702 mounted. FIG. 17A shows a perspective view of the adjustment driver 830 and elastomeric element 702 of the golf club head 800 of FIG. 15A. FIG. 17B shows an additional perspective view of the adjustment driver 830 and elastomeric element 702 of the golf club head 800 of FIG. 15A. 17C shows a side view of the adjustment driver 830 and elastomeric element 702 of the golf club head 800 of FIG. 15A. 17D shows a cross-sectional view of the tuning driver 830 and elastomeric element 702 of FIG. 17A. FIG. 17E shows an additional perspective view of the cross section of the adjustment driver 830 and elastomeric element 702 of FIG. 17A.

As shown in FIGS. 15D and 16 , golf club head 800 includes a striking surface 818 having a rear surface 819 . Golf club head 800 also includes a rear portion 812 configured to support elastomeric element 702 . The golf club head 800 is comprised of a hollow body structure, and the rear portion 812 covers a substantial portion of the rear surface of the golf club head 800. Rear portion 812 is located behind striking surface 818 and extends between topline 807 and sole 805 and from heel 804 to toe 806 to form cavity 820 . An elastomeric element 702 is disposed within cavity 820 . As shown in FIG. 15D , striking surface 818 may be individually formed and welded to the remainder of golf club head 800 . More specifically, the individually formed striking surface portion may include a portion of the sole, which portion forms an L-shaped striking surface portion. In other embodiments, striking surface 818 may be integrally formed with the rest of the golf club.

The golf club head 800 includes an adjustment driver 830 that is substantially similar to the adjustment driver 330 illustrated in FIGS. 3A and 3B and described above. The golf club head 800 also includes a deformable member 702 disposed between the striking surface 818 and the adjustable driver 830 . The deformable member 702 can take the form of any of the elastomeric elements described herein. The adjustment driver 830 is configured to hold the elastomeric element 702 between the adjustment driver 830 and the striking surface 818, the front portion 703 of the elastomeric element 702 being the back side of the striking surface 818. In contact with surface 819 , rear portion 744 of elastomeric element 702 is in contact with adjustment driver 830 . The tuning driver can include an interface 834 configured to retain the elastomeric element 702 . Interface 834 may include a recess with a lip 809 surrounding at least a portion of elastomeric element 702 as shown in FIGS. 15D and 17A-17E .

The golf club head 800 may include an adjustment receiver 890 that is very similar to the adjustment receiver 306 shown in FIGS. 3A and 3B . As shown in FIG. 16 , adjustment receiver 890 may include an opening formed in back portion 812 of golf club head 800 . The opening may include threaded portion 893 . Additionally, the adjustment receiver 890 may include a receiver shelf 895 to which the adjustment driver 830 engages when mounted within the adjustment receiver 890, as shown in FIG. 15D. . The adjustment driver 830 may include a threaded portion 833 configured to engage the threaded portion 893 of the adjustment receiving portion 890, as shown in FIGS. 15D and 17A-17E. Further, the adjustment driver 830 may include a flange 835 configured to engage the receiver shelf 895 of the adjustment receiver 890 when the adjustment driver 830 is mounted within the adjustment receiver 890. . Receptacle shelf 895 and flange 835 help ensure proper and consistent engagement of the elastomeric element with rear surface 819 of strike surface 818 and provide necessary support for optimal performance. . Although the adjustment driver 330 previously discussed is configured to be able to be adjusted after assembly, the preferred embodiment of the adjustment driver 830 shown in FIGS. It is configured to remain in position. The receptacle shelf 895 and flange 835 ensure that the adjustment driver 830 is consistently mounted and the elastomeric element properly and consistently engages the rear surface 819 of the striking face 818 to provide optimum They help provide the necessary support for performance. Adjustment driver 830 may also include a screw drive 832 configured to receive a tool and enable rotation of adjustment driver 830 relative to golf club head 800 . Finally, the adjustment driver 830 may have a certain mass. In some embodiments, the mass of the golf club head may be adjusted by swapping the adjustment driver 830 for another adjustment driver 830 having a different mass. Mass differences may be achieved through the use of different materials for different tuned drivers, such as aluminum, brass, polymers, steel, titanium, tungsten, and the like. In other embodiments not shown, a mass element may be added to the steering driver to change the mass. In one embodiment, a mass element may be added to the recess of the steering driver. A mass element added to the recess may also be used to change the distance between the rear portion of the elastomeric element and the rear surface of the striking face, which changes the compression of the elastomeric element.

18-22 show a golf club head 900 similar to the golf club head 800 shown in FIGS. 15A-15D. However, the golf club head 900 includes a second deformable member 702B in addition to the first deformable member 702A. 18 shows a rear view of a golf club head 900. FIG. 19 shows an exploded view of the golf club head 900 of FIG. 18 . 20 shows a cross-sectional view F-F of a golf club head 900. 21 shows cross-sectional views G-G of a golf club head 900. 22 shows a front view of the golf club head 900 of FIG. 18, including the support area.

As shown in FIGS. 18-22 , golf club head 900 includes a striking surface 918 having a rear surface 919 . The golf club head 900 also includes a rear portion 912 configured to support the first deformable member 702A and the second deformable member 702B. The first deformable member 702A may be the same as the aforementioned deformable member. Each of the first deformable member 702A and the second deformable member 702B may take the form of any of the elastomeric elements described herein. They may take the same form or they may take different forms. Golf club head 900 is made of a hollow body structure, and rear portion 912 covers a substantial portion of the rear surface of golf club head 900 . Rear portion 912 is located behind striking surface 918 and extends from heel 904 to toe 906 between topline 917 and sole 905 to form a cavity 920 . In the illustrated preferred embodiment, the first deformable member 702A is spaced apart from the second deformable member 702B and does not contact the second deformable member. In an alternative embodiment, the first deformable member 702A may be spaced proximate to and contact the second deformable member 702B.

Like the golf club head 800, the golf club head 900 includes an adjustment driver 830 configured to retain the first deformable member 702A. The front portion 703A of the first deformable member 702A contacts the rear surface 919 of the striking surface 918 . The rear portion 912 of the golf club head 900 includes a rear cover 913. In the illustrated embodiment, the rear cover 913 is configured such that the front portion 703B of the second deformable member 702B contacts the rear surface 919 of the striking surface 918. It includes a recess 915 configured to hold. The rear cover 913 also includes an opening 914 for an adjustment driver 830 . In one embodiment, the second deformable member is attached to the rear cover 913 by an adhesive. Additionally, back cover 913 may be attached to the remainder of golf club head 900 with adhesive, which may include, for example, double sided tape. In one embodiment, the striking surface 918 of the golf club head 900 is made of a high-density material, such as steel, while the back cover 913 is made of plastic, which may include, for example, acrylonitrile butadiene styrene. made of low-density materials such as In an alternative embodiment, the rear cover may also be made of a high-density material.

As shown in Fig. 22, the striking surface includes a plurality of support areas. The first support region 742A is formed by that portion of the back surface 919 of the striking surface 918 supported by the first deformable member 702A, which is the back surface 919 of the striking surface 918. ) is formed by the area inside the first support area periphery 740A formed by the outer extent of the front portion 703A of the first deformable member 702A in contact. The second support region 742B is formed by that portion of the back surface 919 of the striking surface 918 supported by the second deformable member 702B, which is the back surface 919 of the striking surface 918. ) is formed by the area inside the second support area periphery 740B formed by the outer extent of the front portion 703B of the second deformable member 702B in contact. First support area 742A and second support area 742B would normally not be visible from the front of golf club head 900, but have been added to FIG. 22 for illustrative purposes.

The first geometric center 743A of the first support area 742A is a striking surface heel reference, measured parallel to the horizon and parallel to the striking surface 918 with the golf club head 900 in the address position. It is located at a first support region offset length SROL 1 from plane 959 towards the toe. The second geometric center 743B of the second support area 742B is the striking surface when measured parallel to the horizon and parallel to the striking surface 918 with the golf club head 900 in the address position. It is located at a second support area offset length SROL 2 from heel reference plane 959 towards the toe.

In a preferred embodiment, SROL 1 is approximately 36.0 mm and SROL 2 is approximately 17.6 mm. In a preferred embodiment, SROL 1 is greater than SROL 2. In a preferred embodiment, SROL 1 divided by SROL 2 is greater than 1.0. In a preferred embodiment, SROL 1 divided by SROL 2 is greater than 1.25. In a preferred embodiment, SROL 1 divided by SROL 2 is greater than 1.50. In a preferred embodiment, SROL 1 divided by SROL 2 is greater than 1.75. In a preferred embodiment, SROL 1 divided by SROL 2 is greater than 2.0. In an alternative embodiment not shown, SROL 2 is greater than SROL 1 .

In one embodiment, the first deformable member 702A is made of the same material as the second deformable member 702B and therefore has the same hardness. In a further embodiment, the first deformable member 702A is made of a material having a greater hardness than the material of the second deformable member 702B. In an alternative embodiment, the material of the first deformable member 702A has a lower modulus than the material of the second deformable member 702B. In one embodiment, the first deformable member 702A has Shore A 50 durometer and the second deformable member has Shore A 10 durometer. In one embodiment, the first deformable member 702A has a Shore A durometer greater than 25 and the second deformable member has a Shore A durometer less than 25.

The first deformable member can be received, structured, or supported similarly to the second deformable member, and the second deformable member can be received, structured, or supported similarly to the first deformable member. should pay attention to Additionally, the first deformable member and the second deformable member may be received, structured or supported in any manner described throughout this disclosure.

23 shows a perspective view of an additional embodiment of a golf club head 900 and second deformable member 702C. Second deformable member 702C is shown in an exploded fashion behind golf club head 900 . FIG. 24 shows the second deformable member 702C shown in FIG. 23 . FIG. 25 shows cross-sectional views F-F of a golf club head 900 including the second deformable member 702C illustrated in FIGS. 23 and 24 . The back portion 912 of the golf club head 900 includes an opening 930 configured to receive a second deformable member 702C or alternatively a second deformable member 702B. 23-25, the second deformable member 702C engages the periphery of the opening 930 of the back portion 912 of the golf club head 900 and the second deformable member 702C and an annular groove 940 formed therein configured to secure the golf club head 900. The portion of the second deformable member 702C is such that it deforms as the second deformable member 702C is fitted into the opening 930 of the golf club head 900 until the groove 940 engages the opening 930. can be configured.

Additional embodiments of golf club heads that include various damping elements will be described below, many of which are applied to the rear surface of the striking surface. The damping elements described below may include any of the deformable members or elastomers described herein, including their materials, properties, geometry and characteristics, and additional details discussed below. The damping element helps reduce vibration and improve the sound produced by the golf club head as it strikes a golf ball by making it more pleasing to the golfer's ear.

26-33 show an additional embodiment of a golf club head 700 having a first damping element 702A and a second damping element 702D. 26 shows a perspective view of a golf club head 700. FIG. 27 shows a side view of the golf club head 700 of FIG. 26 . FIG. 28 shows a cross-sectional view (H-H) of the golf club head 700 of FIG. 26 omitting weighted member 710, second damping element 702D and first damping element 702A. 29 shows a cross-sectional view H-H of the golf club head 700 of FIG. 26 omitting weight member 710 and second damping element 702D. FIG. 30 shows a cross-sectional view H-H of the golf club head 700 of FIG. 26 with weight member 710 omitted. FIG. 31 shows a cross-sectional view H-H of the golf club head 700 of FIG. 26 . FIG. 32 shows a cross-sectional view II-I of the golf club head 700 of FIG. 27 with weight member 710 omitted. FIG. 33 shows a cross-sectional view J-J of the golf club head 700 of FIG. 27 . 34 and 35 show perspective views of a first damping element 702A and a second damping element 702D. 36 and 37 show perspective views of the second damping element 702D.

The golf club head 700 shown in FIGS. 26-33 is an iron with a hollow backside structure and includes a peripheral portion 701 surrounding a striking surface 718 and extending rearwardly therefrom. Perimeter portion 701 includes sole 705 , toe 706 and topline 707 . Also, the outer edge portion 701 may include a weight member 710 . The peripheral portion may also include a rear portion 712 that may partially enclose the cavity 720, as shown in FIG. 26 . In another embodiment, the rear portion may substantially enclose the cavity as shown in FIG. 15A. A peripheral portion 701 of the golf club head 700 may include a cantilever support arm attached to and extending from the sole 705 . As shown in FIG. 28 , support arm 762 may extend substantially parallel to strike surface 718 . As illustrated in FIG. 29 , golf club head 700 may include a first damping element 702A disposed between a cantilever support arm 762 and a rear surface 719 of striking surface 718 . As illustrated in FIG. 26 , first damping element 702A includes a front surface 703A that contacts a central portion of striking surface 718 . The damping element 702A may support the striking surface 718 and provide damping properties as described above. In another embodiment, the rear portion may substantially enclose the cavity as shown in FIG. 15A. In this embodiment, the first damping element may be disposed between the rear surface and the rear portion of the striking surface.

As illustrated in FIGS. 26 and 30-33 , the golf club head may include a second damping element 702D, along with the first damping element 702A in FIGS. 34 and 35 , and 36 and 37 are shown separately. As shown, a portion of the second damping element 702D may be disposed between the back surface 719 of the striking surface 718 and the support arm 762 . The second damping element 702D may be located farther from the geometric center of the striking surface 718 than the first damping element 702A. More specifically, the second damping element 702D can be positioned proximate to the sole 705 . The second damping element 702D includes a front surface 703B that contacts the rear surface 719 of the striking surface 718 and a rear surface 781 that contacts the support arm 762 . Second damping element 702D can include a toe portion 782 extending toewards of support arm 762 . The second damping element 702D can include a heel portion 783 extending heelwards of the support arm 762 . The second damping element 702D can include a rear portion 784 that extends around the support arm 762 to form a cavity 785 configured to receive the support arm. In some embodiments, as illustrated in FIG. 705 , the golf club head may include a weighted member 710 positioned spacedly toward the rear of the support arm, and a posterior portion 784 of the second damping element 702D. ) may exist between the weight member 710 and the support arm 762 . The weight member 710 may be integrally formed with other portions of the golf club head 700 or may be a different material bonded to the golf club head 700. The second damping element 702D may include a relief 786 formed on top of the damping element 702D configured to complement the shape of the first damping element 702A. The second damping element 702D may be formed of an elastomeric material that is deformable and provides damping properties. In one embodiment, the first damping element 702A has a higher modulus of elasticity than the second damping element 702D. In an alternative embodiment, the second damping element 702D has a higher modulus of elasticity than the first damping element 702A. In another embodiment, the first damping element 702A has a substantially similar modulus of elasticity as the second damping element 702D.

In addition to the materials already disclosed, the damping element, more specifically the second damping element 702D, may comprise damping foam. In one embodiment, the second damping element 702D may be formed separately from the golf club head and subsequently mounted. In other embodiments, the second damping element 702D may be co-molded with the golf club head to specifically fit the geometry of that particular club. In other embodiments, the second damping element 702D may be specifically selected or formed to meet the specific geometry of a specific golf club head.

In an alternative embodiment not shown, the first damping element 702A and the second damping element 702D are monolithically from a single piece of material such that a single damping element includes features of both the first and second damping elements. can be formed In other embodiments, more than one piece of material may include the first and/or second damping element.

38-42 show an additional embodiment of a golf club head 700 having a first damping element 702A and a second damping element 702E. 38 shows a perspective view of a golf club head 700. FIG. 39 shows a side view of the golf club head 700 of FIG. 38 . FIG. 40 shows cross-sectional views K-K of the golf club head 700 of FIG. 38 . FIG. 41 shows a cross-sectional view L-L of the golf club head 700 of FIG. 38 . FIG. 42 shows a detail view of FIG. 41 . 43 shows a cross-sectional view M-M of the golf club head 700 of FIG. 38 omitting the first damping element 702A. FIG. 44 shows a perspective view of the second damping element 702E of the golf club head 700 of FIG. 38 .

The golf club head 700 illustrated in FIGS. 38-43 has a first damping element 702A similar to that described above and illustrated in FIGS. 26-33 , other than the golf club head illustrated in FIGS. 26-33 . 2 includes another embodiment of the damping element 702E. Second damping element 702E may be attached to back surface 719 of striking surface 718 . In some embodiments, second damping element 702E may be attached to the striking surface via adhesive 711 . The adhesive 711 may be in the form of double sided tape such as 3M Very High Bond tape, epoxy, glue, or mechanical bonding such as fasteners, rivets or backing plates. As shown, at least a portion of the second damping element 702E may be positioned below the first damping element 702A. The second damping element 702E can extend toward the toe of the first damping element 702A and toward the heel of the first damping element 702A, substantially heel 704, as shown in FIG. to the toe 706. The second damping element 702E may have a relief configured to complement the shape of the first damping element 702A. In an alternative embodiment, the second damping element 702E may cover most of the back surface 719 of the striking surface 718 not covered by the first damping element 702A.

As illustrated in FIG. 44 , a cover 717 may be attached to an outer surface of the second damping element 702E. The outer surface of the second damping element 702E is located on the opposite side of the second damping element 702E as the striking surface 718 . In one embodiment, the thickness of the cover 717 is less than the thickness of the second damping element 702E. In one embodiment, the modulus of elasticity of the cover 717 is higher than that of the second damping element 702E. In one embodiment, the hardness of the cover 717 is higher than the modulus of elasticity of the second damping element 702E.

The golf club head 700 of FIGS. 38-43 also includes a medallion 790 that enhances the appearance of the golf club head 700 . Medallions 790 may also add to the damping qualities of golf club head 700 . 38, 40, 41 and 42, a first portion 791 of the medallion 790 is adhered to the back surface 719 of the striking surface 718, and a second portion 792 It extends rearwardly away from the striking face 718 and behind the support arm 762 . In one embodiment, as shown in FIGS. 41 and 42 , the third damping element 702F is disposed between the back surface of the support arm 762 and the medallion 790 .

45 shows a cross-sectional view of a further embodiment of a golf club head 700. FIG. 46 shows a perspective view of the second damping element 702G and third damping element 702H of the golf club head 700 of FIG. 45 . The golf club head 700 includes a first damping element, a second damping element 702G and a third damping element 702H hidden behind the medallion 790 . The second damping element 702G has a second portion 797 extending rearwardly from the striking surface 718 along the sole 705 in this embodiment. It is very similar to the damping element 702E of FIGS. 38-44 in that it has a first portion 796 disposed on the back surface 719 . In one embodiment, the golf club head 700 has a third damping element 702H that is very similar to the second damping element 702F, except that it covers the upper portion of the back surface 719 of the striking surface 718. ) may also be included. In one embodiment, the third damping element 702H is disposed between the back surface 719 of the striking surface 718 and the medallion 790 . The third damping element 702H may include a relief configured to complement the shape of the first damping element 702A. In an alternative embodiment not shown, the second damping element 702G and the third damping element 702H are monolithically from a single piece of material such that a single damping element includes features of both the second and third damping elements. can be formed In other embodiments, more than one piece of material may include the second and/or third damping element.

Additionally, each of the embodiments of a golf club head described herein with particular reference to FIGS. 26-46 may include a second damping element and/or a third damping element described herein without including the first damping element. there is. Additionally, any combination of damping elements described herein may be combined to form a single damping element that combines the characteristics of each damping element described herein.

One purpose of the damping elements described herein is to dissipate the energy of a golf club head after it strikes a golf ball. As the striking surface and other parts of the golf club head vibrate, damping elements in contact with this surface can dissipate energy. This may change the sound produced by the golf club head by reducing the loudness and/or duration of the sound produced when the golf club head strikes a golf ball. The damping elements, elastomers, and deformable members described herein may be formed of viscoelastic materials. Tanδ represents the ratio of the viscous to elastic response of a viscoelastic material, which is the energy dissipation potential of the material. The larger the Tanδ, the more dissipative the material. More specifically, Tanδ = E"/E', where E" is the loss modulus and represents the energy dissipated by the system, and E' is the storage modulus and represents the energy dissipated by the system. represents the stored energy. Tanδ varies with temperature and vibration frequency. The damping element disclosed herein is preferably formed from a viscoelastic material having a peak Tanδ between 3 kHz and 9 kHz, more preferably between 5 kHz and 7 kHz, within a temperature range of 20°C to 50°C. In some embodiments, the damping elements may be formed of different viscoelastic materials, with one damping element having a Tanδ peaking at a higher frequency than the other damping element. Specifically referring to the golf club head 700 of FIGS. 26-37 , the first damping element 702A is formed of a first viscoelastic material and the second damping element 702D is formed of a second viscoelastic material; Tan δ of the first viscoelastic material peaks at a first frequency, Tan δ of the second viscoelastic material peaks at a second frequency, and the first frequency is less than the second frequency. This specific arrangement allows the first damping element to better dampen striking surface vibration and the second damping element to better dampen support arm vibration.

47-58 show a further embodiment of a golf club head 1000 that includes a damping element 1002. 47 shows a perspective view of a further embodiment of a golf club head 1000. FIG. 48 shows a perspective view in cross section N-N of the golf club head 1000 of FIG. 47 . FIG. 49 shows a side view of a cross section N-N of the golf club head 1000 of FIG. 47 . FIG. 50 shows a detailed view of the golf club head 1000 of FIG. 49 . FIG. 51 shows a perspective view of the golf club head 1000 of FIG. 47 with the damping element 1002 omitted. FIG. 52 shows a perspective view of a cross section O-O of the golf club head 1000 of FIG. 51 . FIG. 53 shows a side view of cross section O-O of the golf club head 1000 of FIG. 51 . FIG. 54 shows a perspective view of the damping element 1002 of the golf club head 1000 of FIG. 47 . FIG. 55 shows an additional perspective view of the damping element 1002 of the golf club head 1000 of FIG. 47 . FIG. 56 shows a perspective view of a cross section P-P of damping element 1002 of FIG. 54 . FIG. 57 shows a side view of a cross section P-P of damping element 1002 of FIG. 54 . FIG. 58 shows a detailed view of the damping element 1002 of FIG. 57 .

Golf club head 1000 includes a striking surface 1018 having a back surface 1019 . Golf club head 1000 includes a rear portion 1012 configured to support a damping element 1002 . The illustrated golf club head 1000 is a hollow body structure, and the rear portion 1012 covers a substantial portion of the rear surface of the golf club head 1000. The rear portion 1012 is located behind the striking surface 1018 and extends from the heel 1004 to the toe 1006 between the topline 1017 and the sole 1005 to form a cavity 1020.

As shown in FIGS. 51-53 , the back portion 1012 of the golf club head 1000 may include an opening 1013 . Opening 1013 may be surrounded by shelf 1014 . The opening 103 is configured to receive the damping element 1002 and the shelf 1014 is configured to engage and retain the damping element 1002 as shown in FIGS. 48-50 .

As shown in FIGS. 54-57 , the damping element 1002 includes an outer portion 1103 and a damping portion 1104 . Outer portion 1103 resides primarily behind rear portion 1012 of golf club head 1000. The damping portion 1104 resides primarily within the cavity 1020 of the golf club head 1000 and is configured to abut the rear surface 1019 of the striking surface 1018 as illustrated in FIGS. 48-50 . A channel 1105 is formed between the outer portion 1103 and the damping portion 1104, and the channel 1105 is configured to engage the shelf 1014 of the rear portion 1012 of the golf club head 1000. As shown in FIGS. 48 , 49 , 55 , and 57 , the damping element 1002 may include a recess formed inside the damping portion 1104 and extending to the outer portion 1103 . In an alternative embodiment not shown, damping element 1002 may not include recess 1106 .

The outer portion 1103 of the damping element 1002 can include a flanged surface 1107 configured to abut the shelf 1014 of the golf club head 1000 . The outer portion 1103 may include an outer surface 1108 opposite the flange surface 1107 . The outer surface 1108 can be external, and thus aesthetically appealing to golfers and designed to replace conventional medallions. In some embodiments, as shown in FIG. 50 , adhesive 1112 may be present between the flange surface 1107 of the damping element 1002 and the shelf 1014 of the rear portion 1012.

48-50, at least a portion of the damping portion 1104 of the damping element 1002 is between the back surface 1019 of the striking surface 1018 and the shelf 1014, such that the shelf ( 1014) and the back surface 1019 both. 58, the damping portion 1104 of the damping element 1002 has a front surface 1109 configured to abut the rear surface 1019 of the striking surface 1018 and a rear surface configured to abut the shelf 1014. may include surface 1110 .

In the illustrated embodiment, the damping portion 1104 and outer portion 1103 of the damping element are monolithic and formed of the same material. In another not shown embodiment, the damping portion 1104 and the outer portion 1103 may be formed of different materials and attached to each other. The damping portion 1104 and thus the damping element 1102 in the preferred embodiment may be formed entirely of any of the materials described herein when referring to the damping element, deformable member and elastomer. Additionally, this material may comprise silicon having a Shore A durometer between approximately 50 and 70, which may also have an approximate compression set of 10%, 70 hours at 212°F, which is It may also have a tensile strength of approximately 1400 psi. Damping element 1102 is configured to deform as striking surface 1018 deforms upon impact with a golf ball, similar to other damping elements, deformable members and elastomers described herein. 58 , the damping portion 1104 may include a relief 1111 configured to aid in the function of the damping portion 1104 to deform and absorb energy during impact.

As shown in FIG. 50 , the striking surface may have a central unsupported area 1016 surrounded by a supported area 1015 . The support area 1015 is formed by that portion of the rear surface 1019 of the striking surface 1018 that is in contact with the front surface 1109 of the damping portion 1104 of the damping element 1002 . The central unsupported area 1016 is formed by that portion of the rear surface 1019 of the striking surface 1018 located in the center of the support area 1015.

In one embodiment, the central unsupported area 1016 may be larger than 100 mm ² . In a further embodiment, the central unsupported area 1016 may be greater than 200 mm ² . In a further embodiment, the central unsupported area 1016 may be larger than 300 mm ² . In a further embodiment, the central unsupported area 1016 may be larger than 400 mm ² . In a further embodiment, the central unsupported area 1016 may be larger than 500 mm ² . In one embodiment, the support area 1015 may be less than 300 mm ² . In one embodiment, the support area 1015 may be less than 250 mm ² . In further embodiments, the support area 1015 may be less than 200 mm ² . In further embodiments, the support area 1015 may be less than 150 mm ² . In further embodiments, the support area 1015 may be less than 125 mm ² . In further embodiments, the support area 1015 may be less than 100 mm ² . In one embodiment, the ratio of the central unsupported area 1016 divided by the support area 1015 is equal to or greater than 1.0. In a further embodiment, the ratio of the central unsupported area 1016 divided by the support area 1015 is equal to or greater than 1.5. In one embodiment, the ratio of the central unsupported area 1016 divided by the support area 1015 is greater than 2.0. In one embodiment, the ratio of the central unsupported area 1016 divided by the support area 1015 is greater than 2.5. In one embodiment, the ratio of the central unsupported area 1016 divided by the support area 1015 is greater than or equal to 3.0. In one embodiment, the ratio of the central unsupported area 1016 divided by the support area 1015 is greater than or equal to 3.5. In one embodiment, the ratio of the central unsupported area 1016 divided by the support area 1015 is greater than or equal to 4.0. In one embodiment, the ratio of the central unsupported area 1016 divided by the support area 1015 is greater than 4.5. In one embodiment, the ratio of the central unsupported area 1016 divided by the support area 1015 is greater than or equal to 5.0.

59 shows a perspective view of a further embodiment of a golf club head 1000. FIG. 60 shows a side view of the cross section Q-Q of the golf club head 1000 of FIG. 59 . The golf club head 100 shown in FIGS. 59 and 60 includes some additional features. In one embodiment, golf club head 1000 includes a second damping element 1120. In the illustrated embodiment, the second damping element 1120 is an o-ring shaped elastomer that resides between the striking surface 1018 and the rear portion 1012 . The second damping element 1120 may form a continuous loop surrounding the damping element 1002 . In some embodiments, the rear portion may include a relief configured to receive a portion of the second damping element.

In one embodiment, the golf club head may include a third damping element 1130. The third damping element is formed between the outer portion 1103 and the back portion 1012 of the golf club head at the top (shown in FIG. 60), bottom (shown in FIG. ), around the heel side (not shown) and toe side (not shown).

In one embodiment, golf club head 1000 includes a fourth damping element 1140. The fourth damping element 1140 can be in the recess 1106 of the damping element 1102 . In one embodiment, the fourth damping element 1140 may include hot melt. In other embodiments, it may include an elastomer. In other embodiments, it may include rubber. In other embodiments, it may include foam. In another embodiment, the fourth damping element 1140 may be softer than the damping element 1002 and thus may have a lower hardness value. In one embodiment, the fourth damping element 1140 may be formed of silicon.

In one embodiment, golf club head 1000 includes a fifth damping element 1150. The golf club head may include a slot configured to receive a fifth damping element 1150, which is preferably rubber. In one embodiment, a slot may be formed in the back portion 1112 of the golf club head. In other embodiments, slots may be formed in one or more of the back portion 1112, topline 1007, toe 1006, and sole 1005.

61 shows an additional cross-sectional view of the golf club head 1000 of FIG. 59 including the golf club shaft 1089 and the sixth damping element 1160. The hosel 1098 of the golf club head includes a hosel bore 1099 configured to receive a shaft 1089. In one embodiment, hosel bore 1099 may receive sixth damping element 1160, which may take the form of a plug as shown in FIG.

62-65 illustrate a further embodiment of a deformable member 702 of the golf club head 800 described above and shown in FIGS. 15A-17E. FIG. 62 shows cross-sectional views E-E of the golf club head 800 of FIG. 15A including an additional embodiment of a deformable member 702. FIG. 63 shows cross-sectional views E-E of the golf club head 800 of FIG. 15A including a further embodiment of a deformable member 702. FIG. 64 shows cross-sectional views E-E of the golf club head 800 of FIG. 15A including an additional embodiment of a deformable member 702. FIG. 65 shows cross-sectional views E-E of the golf club head 800 of FIG. 15A including an additional embodiment of a deformable member 702. FIG. 66 shows the deformable member 702 and adjustment driver 830 of the golf club head 800 of FIG. 62 .

As shown in FIGS. 62-65 , golf club head 800 includes a striking surface 818 having a rear surface 819 . The golf club head 800 also includes a rear portion 812 configured to support a deformable member 702 . Golf club head 800 is comprised of a hollow body structure, and rear portion 812 covers a substantial portion of the rear surface of golf club head 800 . Rear portion 812 is located behind striking surface 818 and extends between topline 807 and sole 805 and from heel to toe to form a cavity 820 . Deformable member 702 is disposed within cavity 820 .

The back portion of the golf club head 800 includes an adjustment driver 830. The deformable member 702 is disposed between the striking surface 818 and the adjustment driver 830 . The adjustment driver 830 is configured to hold the elastomeric element 702 between the adjustment driver 830 and the striking surface 818, the front portion 703 of the elastomeric element 702 being the back side of the striking surface 818. In contact with surface 819 , rear portion 744 of elastomeric element 702 is in contact with adjustment driver 830 .

As shown in FIG. 66, the deformable member 702 has a free thickness FT. As shown in FIG. 62 , the deformable member 702 has a mounting thickness IT. In some embodiments, the free thickness (FT) and fitted thickness (IT) of the deformable member 702 may be substantially equal. In this case, there will be little or no reserve of the deformable member 702 on the back surface 819 of the striking face 818. In other embodiments, the mounting thickness IT may be less than the free thickness FT, which may create a preload force on the back surface 819 of the strike surface 818. This preload force can change the coefficient of rebound of the striking surface 818, which affects how quickly a golf ball will leave the striking surface when struck by the golf club head at a particular club head speed. In some embodiments, the back portion 812 that includes the tuned driver 830 may be configured to have a specific mounting thickness IT to achieve a specific coefficient of restitution. Multiple versions of the tuning driver 830 may be available to fine-tune the coefficient of restitution to a desired value. In further embodiments, multiple versions of deformable member 702 with different free thicknesses (FT) may be available to achieve a particular coefficient of restitution. Alternatively, the material of the deformable member 702 can be altered to change its stiffness and thus the coefficient of restitution of the golf club head.

As shown in FIG. 63 , the adjustment driver 830 may also include a spacer 1200 configured to change the mounting thickness IT of the deformable member 702 . By varying the thickness of spacer 1200, the mounting thickness IT can be varied, thus changing the coefficient of restitution of the golf club head.

As shown in FIG. 64 , the deformable member 702 can include a first material 770 and a second material 780 . A number of material deformable members have been described above with reference to FIGS. 14D, 14E, 14F and 14L. In the embodiment shown in FIG. 64 , a first material 770 contacts the back surface 819 of the striking surface 818 and a second material 780 contacts the adjustment driver 830 . In one embodiment, the first material may have a higher hardness than the second material. In other embodiments, the second material may have a higher hardness than the first material. In a preferred embodiment, the first material may have a Shore A hardness value less than the Shore A hardness value of the second material. In a more preferred embodiment, the first material may have a Shore A hardness value of less than 50 and the second material may have a Shore A hardness value of greater than 15. In a more preferred embodiment, the first material may have a Shore A hardness value of less than 40 and the second material may have a Shore A hardness value of greater than 25. In a more preferred embodiment, the first material may have a Shore A hardness value of less than 30 and the second material may have a Shore A hardness value of greater than 35. In a more preferred embodiment, the first material may have a Shore A hardness value of less than 20 and the second material may have a Shore A hardness value greater than 40. In a more preferred embodiment, the first material may have a Shore A hardness value of less than 15 and the second material may have a Shore A hardness value of greater than 45. By including multiple materials, not only can the face be supported and the coefficient of restitution changed, additional benefits can be achieved including reduced vibration for better feel and sound.

As shown in FIG. 65 , golf club head 800 and deformable member 702 can be configured to substantially deform when deformable member 702 is mounted within golf club head 800 . Similar to the embodiment of FIG. 64 , the deformable member 702 of FIG. 65 can include a first material 770 and a second material 770 . The deformable member 702 has a significant difference between the free thickness FT and the installed thickness IT such that the deformable member 702 is preloaded against the back surface 819 of the striking face 818 . In one embodiment, the free thickness (FT) of the deformable member is at least 5% greater than the fitted thickness (IT). In a further embodiment, the free thickness (FT) of the deformable member is at least 10% greater than the fitted thickness (IT). In a further embodiment, the free thickness (FT) of the deformable member is at least 15% greater than the fitted thickness (IT). In a further embodiment, the free thickness (FT) of the deformable member is at least 20% greater than the fitted thickness (IT). In some embodiments, as shown in FIG. 65 , a portion of deformable member 702 is a front portion that abuts rear surface 819 of striking surface 818 when mounted to golf club head 800 . The diameter of 703 can be deformed so that it is larger than the diameter of the adjusting receiver 890 through which the deformable member 702 is mounted.

One method of using the embodiments described herein is outlined in FIG. 67 . During construction of the golf club head 800, one may identify a target coefficient of rebound of the golf club head 1211, then select an appropriate deformable member configuration to arrive at the target coefficient of rebound value 1212, and then select the The deformable member configuration may be mounted to the golf club head 1213, then optionally, the coefficient of restitution of the golf club head may be tested, and the deformable member configuration may be modified 1214 if necessary, then optionally, thereafter , the previous step may be repeated as needed (1215). Alternatively, rather than using the coefficient of restitution as a measurement and target value for a golf club head, a characteristic time similar to the coefficient of restitution and easier to measure may be used.

Although the method and deformable member 702 described above with reference to FIGS. 62-67 have been illustrated and described with respect to the golf club head 800, it can be used with any golf club head embodiment described herein.

As noted above, the golf club head 700 illustrated in FIGS. 26-33 includes a second damping element 702D. The second damping element 702D may be disposed between the back surface 719 of the striking surface 718 and the support arm 762 . In addition, at least one weight member 710 may be present, and the second damping element 702D is between the rear surface 719 of the striking surface 718 and the weight member 710 or between the support arm 762 and the weight. It may be disposed between members 710. It is also noted that the second damping element 702D can be separately formed from and subsequently mounted from the golf club head or co-molded with the golf club head to specifically fit the geometry of a particular club. The cavity molding process may include a pour-in filler material that cures after being inserted into the golf club head. The injection filler material may use a first component and a second component that begin to harden when mixed together and inserted into a golf club head. Additionally, the second damping element 702D can include a combination of both, up to a pre-formed member that is mounted into the golf club head in addition to the implanted portion. The injected portion may help occupy any gap between the striking face 718, support arm 762, weight member 710 or back portion 712 of the golf club head 700 and the preformed member. . The implanted portion can reduce any discrepancies between clubs due to component and assembly tolerances and ensure flush contact with the intended surface of the golf club head. Examples of injectable filler materials that may be used in golf club heads include Flex Seal™ liquid rubber or Dip Seal™ cellulosic plastic coating. In other embodiments, a foam material may be used in place of the infused rubber material. The foam may be preformed, may be a pour-in cast in place foam, or may be a combination of the two. Also, much like what has been described above, injectable foam can be used in addition to preformed elastomeric members. An adhesive may be used with any of the combinations of the above embodiments to help secure the damping element in place.

68-71 show a further embodiment of a golf club head 1300 having a damping element 702. 68 shows a perspective view of a golf club head 1300. FIG. 69 shows cross-sections R-R of the golf club head 1300 of FIG. 68 with weight member 1311 omitted. FIG. 70 shows a perspective view of cross section R-R of the golf club head 1300 of FIG. 69 . FIG. 71 shows cross-sectional views S-S of the golf club head 1300 of FIG. 68 omitting the weight member 1311 and damping element 702. While the golf club head 1300 of FIGS. 68-71 shares many features and qualities with the golf club head 700 shown in FIGS. 26-33 and described above, it includes some unique features.

The golf club head 1300 shown in FIGS. 68-71 is an iron with a hollow backside structure and includes a peripheral portion 1301 that surrounds the striking surface 1318 and extends rearwardly from the striking surface 1318 . Perimeter portion 1301 includes sole 1305 , toe 1306 , heel 1304 , and topline 1307 . The peripheral portion 701 may include one or more weight members 1310 and 1311 . Perimeter portion 1301 may include a rear portion 1312 that may partially enclose cavity 1320 . The outer portion 1301 of the golf club head 1300 can include a support arm 1366 . As shown in FIGS. 68-71 , support arm 1366 can extend from sole 1305 to topline 1307 . The support arm 1366 can include a first portion 1365 , a cradle 1308 , and a second portion 1366 . First portion 1365 extends from sole 1305 . First portion 1365 can be at least partially integrated into rear portion 1312 as shown. The first part 1365 is connected to a cradle 1308, which is disposed between the back surface 1319 of the striking surface 1318 and the cradle 1308 of the support arm 1362. The damping element 702 ) is configured to support. Second portion 1366 extends between topline 1307 and cradle 1308 . The damping element 702 can support the striking surface 1318 and provide damping properties as described above. In other embodiments, golf club head 1300 may also include additional damping elements such as the embodiments described above. In other embodiments, the rear portion may substantially enclose the cavity. In other embodiments, additional members, such as medallions, may be attached to the back portion of the golf club head. In some embodiments, medallions may cover support arm 1365 and damping element 702 from view.

As shown, the first portion 1365 is substantially thicker in the fore-aft direction than in the heel-toe direction, and the second portion 1366 is substantially thicker in the heel-toe direction than in the fore-aft direction. thick. In other embodiments, this may be reversed. In another embodiment, both first portion 1365 and second portion 1365 may be substantially thicker in the fore-to-back direction than in the heel-toe direction. In another embodiment, both first portion 1365 and second portion 1365 may be substantially thicker in the heel-toe direction than in the fore-to-back direction.

72 and 73 show additional embodiments of golf club head 1400 alternative configurations to golf club head 1300 shown in FIGS. 68-71. 72 shows a perspective view of a golf club head 1400 omitting the striking surface and damping elements. FIG. 73 shows an additional perspective view of the golf club head 1400 of FIG. 72 , again omitting the striking surface and damping elements. The golf club head 1400 of FIGS. 72 and 73 shares many features and qualities with the golf club head 1300 shown in FIGS. 68-71 and described above. The main difference between the embodiments is the support arm 1462. Golf club head 1400 includes support arms 1462 arranged substantially horizontally as opposed to substantially vertical support arms 1362 of golf club head 1300 . A first portion 1462 and a second portion 1465 extend from the peripheral portion 1401 and are each connected to a cradle 1408 configured to support the damping element 702 . A first portion 1465 extends from the heel side 1404 of the golf club head 1400. The heel side 1404 of the golf club head 1400 can include a weight member 1410 and a first portion 1465 can extend toward the toe from the weight member 1410 to the cradle 1408 . A second portion 1466 extends from the toe side 1406 of the golf club head 1400. The toe side 1406 of the golf club head 1400 can include a weight member 1411 and a second portion 1466 can extend toward the heel from the weight member 1411 to the cradle 1408 . In alternative embodiments, golf club head 1400 may not include a damping element. In such an embodiment, the support arm may directly contact the rear surface of the striking surface. Alternatively, the support arm may be offset from the back surface of the striking surface by a small distance, for example 0.5 mm, such that when a golf ball strikes the striking surface, the striking surface is deflected into the supporting arm and the support arm This then reduces the striking face deflection and supports the striking face in a central position.

The first portion 1465 of the support arm angles upward toward the cradle 1408 from the heel side 1404 , measured with respect to the x-axis. In some embodiments, first portion 1465 may be angled upward by greater than 5 degrees. In other embodiments, first portion 1465 may be angled upward by greater than 10 degrees. In other embodiments, first portion 1465 may be angled upward by greater than 15 degrees. In other embodiments, first portion 1465 may be angled upwards by greater than 20 degrees. In other embodiments, first portion 1465 can be angled upwards by greater than 25 degrees. In other embodiments, first portion 1465 may be angled upward by greater than 30 degrees. A second portion 1466 of the support arm angles upward toward the cradle 1408 from the toe side 1406 , measured about the x-axis. In some embodiments, second portion 1466 may be angled upward by greater than 5 degrees. In other embodiments, second portion 1466 may be angled upward by greater than 10 degrees. In other embodiments, the second portion 1466 may be angled upward by greater than 15 degrees. In other embodiments, the second portion 1466 may be angled upward by greater than 20 degrees. In other embodiments, the second portion 1466 may be angled upward by greater than 25 degrees. In other embodiments, the second portion 1466 may be angled upward by greater than 30 degrees.

Although specific embodiments and aspects have been described herein and specific examples provided, the scope of the present invention is not limited to these specific embodiments and examples. Those of ordinary skill in the art will recognize other embodiments or improvements that fall within the scope and spirit of this invention. Thus, specific structures, acts, or media are described as exemplary embodiments only. The scope of the invention is defined by the following claims and any equivalents.

Claims (20)

It is a golf club head,
striking surface;
a peripheral portion surrounding the striking surface and extending rearwardly from the striking surface;
A coordinate system centered at the center of gravity of the golf club head, the coordinate system comprising: a y-axis extending perpendicularly to a horizontal plane when the golf club head is at a loft and lie defined at an address position, a heel of the golf club head an x-axis perpendicular to the y-axis and parallel to the striking surface and a z-axis perpendicular to the y-axis and the x-axis and extending through the striking surface;
wherein the striking surface includes a front surface configured to hit a golf ball and a rear surface opposite the front surface;
a support arm spaced apart from the rear surface of the striking face, the support arm extending from the peripheral portion;
the support arm being attached to the peripheral portion at two distinct locations;
A damping element present between the support arm and the rear surface of the striking surface,
the damping element includes a front surface in contact with the rear surface of the striking surface and a rear surface in contact with the support arm;
the peripheral portion includes a sole extending rearwardly from the bottom of the striking surface and a topline extending rearwardly from the top of the striking surface;
the support arm includes a first portion extending from the sole toward the damping element and a second portion extending from the topline toward the damping element;
the first portion of the support arm has a first thickness along the z-axis and a first thickness along the x-axis; the first thickness along the z-axis is greater than the first thickness along the x-axis;
the second portion of the support arm has a second thickness along the x-axis and a second thickness along the z-axis; wherein the second thickness along the x-axis is greater than the second thickness along the z-axis;
a medallion glued to the peripheral portion of the golf club head to create an internal cavity, wherein the support arm and the damping element are within the cavity;
wherein the damping element comprises an elastomer;
Including, golf club head. According to claim 1,
A periphery of the front surface of the damping element defines a support area, the support area includes a geometric center, the striking surface includes a plurality of scorelines, the striking surface comprises the y-axis and the x-axis. a heel reference plane extending parallel to the axis, the heel reference plane being offset 1 millimeter toward the heel from the heel end of the scoreline, the geometric center of the support area being parallel to the x-axis. located a length of support area offset from the heel reference plane toward the toe, the striking surface measured from the heel reference plane to the toe-side end of the front surface of the striking surface parallel to the x-axis. a face length, wherein the golf club head includes a support region offset ratio comprising a value obtained by dividing the support region offset length by the striking face length multiplied by 100%, wherein the support region offset ratio is 40% Ideal, golf club head. According to claim 1,
and further comprising a second damping element in contact with the striking surface, the second damping element being separate and distinct from the damping element. It is a golf club head,
striking surface;
a peripheral portion surrounding the striking surface and extending rearwardly from the striking surface;
A coordinate system centered at the center of gravity of the golf club head, the coordinate system comprising: a y-axis extending perpendicularly to a horizontal plane when the golf club head is at a loft and lie defined at an address position, a heel of the golf club head an x-axis perpendicular to the y-axis and parallel to the striking surface and a z-axis perpendicular to the y-axis and the x-axis and extending through the striking surface;
wherein the striking surface includes a front surface configured to hit a golf ball and a rear surface opposite the front surface;
a support arm spaced apart from the rear surface of the striking face, the support arm extending from the peripheral portion;
the support arm being attached to the peripheral portion at two distinct locations;
A damping element present between the support arm and the rear surface of the striking surface,
the damping element includes a front surface in contact with the rear surface of the striking surface and a rear surface in contact with the support arm;
the damping element, wherein the support arm extends substantially parallel to the y-axis;
Including, golf club head. According to claim 4,
the peripheral portion includes a sole extending rearwardly from the bottom of the striking surface and a topline extending rearwardly from the top of the striking surface; wherein the support arm includes a first portion extending from the sole toward the damping element and a second portion extending from the topline toward the damping element. According to claim 5,
the first portion of the support arm has a first thickness along the z-axis and a first thickness along the x-axis; the first thickness along the z-axis is greater than the first thickness along the x-axis; the second portion of the support arm has a second thickness along the x-axis and a second thickness along the z-axis; wherein the second thickness along the x-axis is greater than the second thickness along the z-axis. According to claim 4,
further comprising a medallion bonded to the peripheral portion of the golf club head to create an internal cavity; wherein the support arm and the damping element reside within the cavity. According to claim 4,
wherein the damping element comprises an elastomer. According to claim 4,
A periphery of the front surface of the damping element defines a support area, the support area includes a geometric center, the striking surface includes a plurality of scorelines, the striking surface comprises the y-axis and the x-axis. a heel reference plane extending parallel to the axis, the heel reference plane being offset 1 millimeter toward the heel from the heel end of the scoreline, the geometric center of the support area being parallel to the x-axis. located a length of support area offset from the heel reference plane toward the toe, the striking surface measured from the heel reference plane to the toe-side end of the front surface of the striking surface parallel to the x-axis. a face length, wherein the golf club head includes a support region offset ratio comprising a value obtained by dividing the support region offset length by the striking face length multiplied by 100%, wherein the support region offset ratio is 40% Ideal, golf club head. According to claim 4,
and further comprising a second damping element in contact with the striking surface, the second damping element being separate and distinct from the damping element. It is a golf club head,
striking surface;
a peripheral portion surrounding the striking surface and extending rearwardly from the striking surface;
A coordinate system centered at the center of gravity of the golf club head, the coordinate system comprising: a y-axis extending perpendicularly to a horizontal plane when the golf club head is at a loft and lie defined at an address position, a heel of the golf club head an x-axis perpendicular to the y-axis and parallel to the striking surface and a z-axis perpendicular to the y-axis and the x-axis and extending through the striking surface;
wherein the striking surface includes a front surface configured to hit a golf ball and a rear surface opposite the front surface;
a support arm spaced apart from the rear surface of the striking face, the support arm extending from the peripheral portion;
the support arm being attached to the peripheral portion at two distinct locations;
A damping element present between the support arm and the rear surface of the striking surface,
wherein the damping element includes a front surface in contact with the rear surface of the striking surface and a rear surface in contact with the support arm;
including,
wherein the support arm includes a first portion extending toward the damping element from a heel side of the golf club head and a second portion extending toward the damping element from a toe side of the golf club head. According to claim 11,
Further comprising a heel side weight member and a toe side weight member, wherein the first portion of the support arm extends from the heel side weight member and the second portion of the support arm extends from the toe side weight member. golf club head. According to claim 11,
the first portion of the support arm has a first thickness along the x-axis and a first thickness along the z-axis; the first thickness along the x-axis is greater than the first thickness along the z-axis, and the second portion of the support arm has a second thickness along the x-axis and a second thickness along the z-axis; ; wherein the second thickness along the x-axis is greater than the second thickness along the z-axis. According to claim 11,
further comprising a medallion bonded to the peripheral portion of the golf club head to create an internal cavity; wherein the support arm and the damping element reside within the cavity. According to claim 11,
wherein the damping element comprises an elastomer. According to claim 11,
wherein the first portion of the support arm angles upward toward the damping element from the heel side of the golf club head at an angle to the x-axis greater than 5 degrees. According to claim 11,
wherein the second portion of the support arm angles upward toward the damping element from the toe side of the golf club head at an angle to the x-axis greater than 5 degrees. According to claim 11,
the first portion of the support arm angles upward toward the damping element from the heel side of the golf club head at an angle to the x-axis of greater than 5 degrees, and the second portion of the support arm angles upward toward the damping element from the toe side of the golf club head at an angle to the x-axis greater than 5 degrees. According to claim 11,
A periphery of the front surface of the damping element defines a support area, the support area includes a geometric center, the striking surface includes a plurality of scorelines, the striking surface comprises the y-axis and the x-axis. a heel reference plane extending parallel to the axis, the heel reference plane being offset 1 millimeter toward the heel from the heel end of the scoreline, the geometric center of the support area being parallel to the x-axis. located a length of support area offset from the heel reference plane toward the toe, the striking surface measured from the heel reference plane to the toe-side end of the front surface of the striking surface parallel to the x-axis. a face length, wherein the golf club head includes a support region offset ratio comprising a value obtained by dividing the support region offset length by the striking face length multiplied by 100%, wherein the support region offset ratio is 40% Ideal, golf club head. According to claim 11,
and further comprising a second damping element in contact with the striking surface, the second damping element being separate and distinct from the damping element.

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