JP6472865B2 - Golf club head groove and method of manufacturing golf club head groove - Google Patents

Description

RELATED APPLICATION This claims the benefit of US patent application Ser. No. 14 / 529,590, filed Oct. 31, 2014 and incorporated herein by reference.

  The present disclosure relates generally to golf equipment, and more particularly to golf club head grooves and methods of manufacturing golf club head grooves.

  Typically, a golf club head can include a club face having a plurality of parallel grooves extending between a toe end and a heel end. In particular, the plurality of grooves in the iron-type club head can remove water, sand, lawn, and / or other debris between the golf ball and the club face. The golf club face can have grooves having various shapes, such as square or box-shaped grooves, V-shaped grooves, or U-shaped grooves.

FIG. 6 is a diagram illustrating a putter according to one embodiment. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. 4 is a schematic plan view of the groove of the ball striking surface of FIG. 5 is a horizontal cross-sectional view of the groove of FIG. 4 as viewed from section 5-5 of FIG. FIG. 4 is a horizontal sectional view of another groove on the ball striking surface of FIG. 3. FIG. 4 is a horizontal sectional view of another groove on the ball striking surface of FIG. 3. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 9 is a schematic plan view of a groove on the ball striking surface of FIG. 10 is a horizontal cross-sectional view of the groove of FIG. 9 as viewed from cross-section 10-10 of FIG. It is a horizontal sectional view of another groove of the ball hitting surface of FIG. It is a horizontal sectional view of another groove of the ball hitting surface of FIG. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. 14 is a schematic plan view of the groove of the ball striking surface of FIG. 15 is a horizontal cross-sectional view of the groove of FIG. 14 as viewed from cross section 15-15 of FIG. FIG. 14 is a horizontal sectional view of another groove on the ball striking surface of FIG. 13. FIG. 14 is a horizontal sectional view of another groove on the ball striking surface of FIG. 13. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 19 is a schematic plan view of the groove of the ball striking surface of FIG. 20 is a horizontal cross-sectional view of the groove of FIG. 19 as viewed from the cross-section 20-20 of FIG. FIG. 19 is a horizontal sectional view of another groove of the ball striking surface of FIG. 18. FIG. 19 is a horizontal sectional view of another groove of the ball striking surface of FIG. 18. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 24 is a view of another embodiment of the vertical cross section of the groove of the ball striking surface of FIG. 23, as viewed from the cross section 24-24 of FIG. FIG. 24 is a view of another embodiment of the vertical cross section of the groove of the ball striking surface of FIG. 23, as viewed from the cross section 24-24 of FIG. FIG. 24 is a view of another example of a vertical cross section of the groove of the ball striking surface of FIG. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 5 is a schematic diagram of an exemplary horizontal cross section of a groove on a ball hitting surface of a putter. FIG. 5 is a schematic diagram of an exemplary horizontal cross section of a groove on a ball hitting surface of a putter. FIG. 5 is a schematic diagram of an exemplary horizontal cross section of a groove on a ball hitting surface of a putter. FIG. 5 is a schematic diagram of an exemplary horizontal cross section of a groove on a ball hitting surface of a putter. FIG. 5 is a schematic diagram of an exemplary horizontal cross section of a groove on a ball hitting surface of a putter. FIG. 5 is a schematic diagram of an exemplary horizontal cross section of a groove on a ball hitting surface of a putter. FIG. 5 is a schematic diagram of an exemplary horizontal cross section of a groove on a ball hitting surface of a putter. FIG. 5 is a schematic diagram of an exemplary horizontal cross section of a groove on a ball hitting surface of a putter. FIG. 5 is a schematic diagram of an exemplary horizontal cross section of a groove on a ball hitting surface of a putter. FIG. 6 is a schematic plan view of an exemplary groove on a ball hitting surface of a putter. FIG. 6 is a schematic plan view of an exemplary groove on a ball hitting surface of a putter. FIG. 6 is a schematic plan view of an exemplary groove on a ball hitting surface of a putter. FIG. 6 is a schematic plan view of an exemplary groove on a ball hitting surface of a putter. FIG. 6 is a schematic plan view of an exemplary groove on a ball hitting surface of a putter. FIG. 6 is a schematic plan view of an exemplary groove on a ball hitting surface of a putter. FIG. 6 is a schematic plan view of an exemplary groove on a ball hitting surface of a putter. FIG. 6 is a schematic plan view of an exemplary groove on a ball hitting surface of a putter. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 5 is a horizontal cross-sectional view of a groove of a putter according to one embodiment. FIG. 3 is a vertical schematic cross-sectional view of a putter according to one embodiment. FIG. 3 is a vertical schematic cross-sectional view of a putter according to one embodiment. FIG. 6 is a diagram of a putter face according to another embodiment. FIG. 6 is a diagram of a putter face according to another embodiment. 1 is a diagram of a method for manufacturing a golf club, according to one embodiment. FIG. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. It is sectional drawing of the groove | channel of the ball | bowl hitting surface of FIG. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 57 is a cross-sectional view of a groove on the ball striking surface of FIG. 56. FIG. 4 is a schematic view of a ball hitting surface of a putter according to one embodiment. FIG. 59 is a cross-sectional view of a groove on the ball striking surface of FIG. 58. 1 is a schematic view of a ball hitting surface of a putter, according to one embodiment. FIG. FIG. 61 is a schematic plan view of a groove on the ball striking surface of FIG. 60. FIG. 62 is a horizontal cross-sectional view of the groove of FIG. 61 taken from section 62-62 of FIG. It is a figure of the tool for cutting a groove | channel. FIG. 6 is a view of a V-shaped groove, according to one embodiment. FIG. 6 is a view of a V-shaped groove, according to one embodiment. FIG. 3 is a schematic plan view of a groove according to one embodiment. FIG. 67 is a horizontal sectional view of the groove of FIG. 66.

  In general, golf club head grooves and methods for manufacturing golf club head grooves are described herein. Golf articles associated with the methods, apparatus, and / or articles of manufacture described herein may or may not conform to any particular time of day golf rules. Further, the figures provided herein are for illustrative purposes, and one or more of the figures may not be drawn to scale. The devices, methods, and articles of manufacture described herein are not limited in this regard.

  In the embodiment of FIG. 1, a putter 100 is shown. Although the groove of the putter 100 is described herein, the apparatus, method, and article of manufacture described herein may be used for other types of club heads (eg, driver type club heads, fairway wood type club heads, hybrids). Type club head, iron type club head, etc.). For example, the groove of an iron-type club head is described in detail in US Patent Application No. 2010/0035702, filed Aug. 5, 2009, the entire disclosure of which is expressly incorporated by reference. Thus, references to putters herein can include any type of golf club.

  The putter 100 includes a putter head 102 having a putter face 110. The putter face 110 may generally be planar. The putter face 110 generally includes a ball striking surface 112 that may be on the same plane as the putter face 110 or may protrude slightly outward from the putter face 110. The ball striking surface 112 may be the same size as the putter face 110 or may be smaller than the putter face 110 (as shown in FIG. 1). The ball striking surface 112 may be an area on the putter face 110 that is commonly used to hit a golf ball (not shown). However, a person may also hit the ball with a portion of the putter face 110 that is outside the ball striking surface 112.

  The ball striking surface 112 may be a continuous or integral part of the putter face 110 or may be formed as an insert attached to the putter face 110. Such an insert can be made from the same or different material as the putter face 110 and then attached to the putter face 110. The ball striking surface 112 can include one or more grooves, generally shown as grooves 120, and one or more peaks 170. For example, the ball striking surface 112 is shown having twelve grooves, generally indicated as 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, and 144. The groove 120 can generally be referenced using a single reference number, such as 120. However, when specifically describing one of the grooves on the ball striking surface 112, the specific groove reference number may be used.

  Two adjacent grooves can be separated by a ridge 170. The crest 170 between each groove 120 and the adjacent groove 120 may have the same or different width as the crest 170 between another pair of adjacent grooves 120. The crest 170 can also define the top surface of the ball striking surface 112. In general, two or more of the grooves 120 may be parallel to each other. For example, the groove 122 and the groove 124 may be parallel to each other. However, the grooves 120 can be oriented in any manner relative to each other. For example, any of the grooves 120 can be oriented diagonally, vertically, and / or horizontally. As shown in the embodiment of FIG. 2, one or more of the grooves 120 may be substantially linear and generally parallel to adjacent grooves 120, and the toe end 180 and heel end 190 of the putter face 110 Can stretch between.

  As will be described in detail below, the depth, length, width, horizontal cross-sectional shape, and / or vertical cross-sectional shape of the groove 120 may be arched at linear, non-linear, uniform or non-uniform stepped intervals. And / or increase, decrease, and / or change of the putter head 102 from toe end 180 to heel end 190 and / or from top rail 182 to sole 192 according to one or more geometric shapes. be able to. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  Referring to FIG. 2, the ball striking surface 112 is shown having a groove 122 to a groove 144. The ball striking surface 112 may be an integral part of the putter face 110, such as manufactured with the putter face 110. Alternatively, the ball striking surface 112 may be an insert that is attached to the putter face 110. Each of the grooves 120 can extend from the toe end 180 to the heel end 190 to define a corresponding length 193 (only the length 193 of the groove 144 is shown in FIG. 2). The length 193 of some or all of the grooves 120 can vary in the direction from the top rail 182 to the sole 192 so that each groove 120 generally matches the shape of the outer periphery of the ball striking surface 112. be able to. For example, the length of the groove can increase from near the top rail 182 to the center 184 of the ball striking surface 112 and decrease from the center 184 to near the sole 192. The center 184 may be the geometric center of the ball striking surface 112. Alternatively, the center 184 can represent a center related to the inertia or weight of the ball striking surface 112. However, the center 184 can generally be defined as the area of the ball striking surface 112 on which a normal ball is hit. As shown in FIG. 1, the length 193 of the groove 120 may be similar. In other embodiments, such as the embodiment shown in FIG. 2, the groove length 193 may decrease from near the top rail 182 to the center 184 and from near the sole 192 to the center 184. Accordingly, the length of any groove disposed on the ball striking surface 112 is within the scope of the present disclosure.

  In another embodiment shown in FIG. 3, the ball striking surface 212 can include grooves 220 (specifically shown as grooves 222-244). The ball striking surface 212 may be an integral part of the putter face 110 or another part attached to the putter face 110. Therefore, when describing the ball striking surface 212, the parts of the putter 100 and the putter head 102 are referred to using the same reference numerals as described above.

  4 shows a schematic view of the groove 232, and FIG. 5 shows a horizontal cross section of the groove 232 as seen from the section line 5-5 of FIG. Groove 232 is shown divided into horizontally extended regions, generally indicated as regions 271-275, which are visually defined by vertical boundaries in FIGS. 3 and 4. Has been. The horizontal region 271 to the horizontal region 275 can define a change in the horizontal cross-sectional shape of the groove 232 from near the toe end 180 to near the heel end 190 and / or from near the top rail 182 to near the sole 192. . The horizontal cross-sectional shape of the groove can refer to any characteristic of the groove along the length 293 of the groove, such as the length, depth, width, cross-sectional shape, and / or constituent material of a particular portion of the groove. . In the example of FIGS. 3-7, the groove 220 includes a first vertical wall 250 and a second vertical wall 252 that define a length 293 of the groove 220. Each of the grooves 220 has a bottom surface 254 that defines the depth of the groove 220. The depth of each groove can vary from the first wall 250 to the second wall 252 according to the cross-sectional shape of the groove 220 in the regions 271 to 275. Each groove 220 also includes a first horizontal wall 256 and a second horizontal wall 258 that define a vertical boundary of the groove 220. The distance between the first horizontal wall 256 and the second horizontal wall 258 defines the width 280 of the groove 220. The width 280 can vary from the first vertical wall 250 to the second vertical wall 252 as shown in the embodiment of FIGS. 38-45, in which case the groove has a length 590, a first width. 594, a second width 595, and / or a third width 596. However, in the embodiment of FIGS. 3-7, the first horizontal wall 256 and the second horizontal wall 258 are generally parallel to define a generally constant width 280.

  Referring to FIG. 5, the bottom surface 254 of the region 271 is inclined or curved downward to define a first depth 282 at the boundary between the region 271 and the region 272. The bottom surface 254 of the region 272 has a steeper downward curve and transitions from the first depth 282 to a second depth 284 at the boundary between the region 272 and the region 273. If the bottom surface 254 is flat in the region 273, the second depth 284 can generally define the maximum depth of the groove 232. However, if the bottom surface 254 is not flat, the maximum depth of the groove 232 may be defined by another portion of the region 273. Any of the grooves 220 may be symmetric with respect to the vertical axis y. Therefore, the shape of the groove 220 on each side of the y-axis can reflect the shape of the groove 232 on the other side of the y-axis. However, any of the grooves 220 may be asymmetric. Region 271 and region 275 define a shallow portion of groove 232, and region 273 defines a deeper central portion of groove 232. The deepest portion of any of the grooves 220 may be in the center of the groove 220. Regions 272 and 274 facilitate the transition of bottom surface 254 from depth 282 to depth 284.

  With reference to FIGS. 3 and 5, the general cross-sectional shape of each of the grooves 220 may generally remain the same from the top rail 182 to the sole 190. However, the cross-sectional shape including the length, width, and / or depth of each region 271 -region 275 of the groove 220 can gradually change from the top rail 182 to the sole 192. 6 and 7, horizontal sections of the groove 238 and the groove 244 are shown, respectively. For example, the lengths of the regions 271 to 275 of the groove 238 are shorter than the regions 271 to 275 of the groove 232, respectively. Similarly, the lengths of the regions 271 to 275 of the groove 244 are shorter than the regions 271 to 275 of the groove 238, respectively. In another example, regions 271 to 275 of groove 238 can each have a shallower depth than regions 271 to 275 of groove 232. Similarly, the region 271 to the region 275 of the groove 244 can have a shallower depth than the region 271 to the region 275 of the groove 238, respectively.

  The length, depth, and / or width of the region 271 to the region 275 of the groove 222 to the groove 232 gradually increase from the top rail 182 to the rough center of the ball striking surface 212, and / or the groove 232 to the groove. The size of the regions 271 to 275 of 244 decreases from the approximate center of the ball striking surface 212 to the sole 192, thereby forming a central strike zone 260 (shown in FIG. 3). When viewed by an individual who has taken, it can resemble the shape of a golf ball. The approximate visual representation of the golf ball can help an individual align the ball striking surface 212 with the ball. The region 273 that defines the deepest portion of the groove 220 is longer in the center of the ball striking surface 212, and the length can be gradually reduced toward the top rail 182 and the sole 192. Similarly, the transition region 272 and the transition region 274 have the maximum length at the center of the ball hitting surface 212, and the length can be gradually reduced toward the top rail 182 and the sole 192. The length of the region 271 to the region 275 may vary depending on the position of the groove 220 on the ball striking surface 212, but the depth of the similar region of each groove 220 may be similar or different. For example, the maximum depth of groove 232 may be similar to the maximum depth of groove 244. Alternatively, the depth of the grooves 222-244 can vary based on the position of the groove 220 relative to the ball striking surface 212. Further alternatively, the depth of the grooves 222-244 can vary from the top rail 182 to the sole in any manner. While the above examples may describe a specific number of horizontal regions, the devices, methods, and articles of manufacture described herein can include more or less horizontal regions.

  In another embodiment shown in FIG. 8, the ball striking face 312 includes grooves 320 (shown specifically as grooves 322 to 344). The ball striking surface 312 may be an integral part of the putter face 110 or another part attached to the putter face 110. Accordingly, when describing the ball striking surface 312, the parts of the putter 100 and the putter head 102 are referred to using the same reference numerals as described above.

  FIG. 9 shows a schematic view of the groove 332, and FIG. 10 shows a horizontal section of the groove 332 as seen from the section line 10-10 in FIG. The groove 332 is shown divided into horizontally extending regions 371 to 375, which are visually defined by vertical boundaries in FIGS. Horizontal region 371-horizontal region 375 may define a change in horizontal cross-sectional shape of groove 332 from near toe end 180 to near heel end 190 and / or from near top rail 182 to near sole 192. it can. The horizontal cross-sectional shape of the groove can refer to any characteristic of the groove along the length 393 of the groove, such as the length, depth, width, cross-sectional shape, and / or constituent material of a particular portion of the groove. . In the example of FIGS. 8-12, the groove 320 includes a first vertical wall 350 and a second vertical wall 352 that define a length 393 of the groove 320. Each of the grooves 320 has a bottom surface 354 that defines the depth of the groove 320. The depth of each groove can vary from the first wall 350 to the second wall 352 according to the cross-sectional shape of the groove 320 in the regions 371 to 375. Each groove 320 also includes a first horizontal wall 356 and a second horizontal wall 358 that define a vertical boundary of the groove 320. The distance between the first horizontal wall 356 and the second horizontal wall 358 defines the width 380 of the groove 320. The width 380 can vary from the first vertical wall 350 to the second vertical wall 352 as shown in the embodiment of FIGS. However, in the embodiment of FIGS. 8-12, the first horizontal wall 256 and the second horizontal wall 258 are generally parallel to define a generally constant width 380.

  Referring to FIG. 10, the bottom surface 354 in region 371 may be generally flat and / or slightly inclined to define a first depth 382 at the boundary between 371 and 372. The bottom surface 354 in the region 372 transitions stepwise downward from the first depth 382 to the second depth 384 at the boundary between the region 372 and the region 373. The bottom surface 354 in the region 372 may be generally flat and / or slightly inclined so that the groove 320 has a generally uniform depth 384 in the region 372. The bottom surface 354 in the region 372 gradually changes downward from the second depth 384 to the third depth 386. The bottom surface 354 in the region 373 may be generally flat or slightly inclined so that the groove 320 has a generally uniform depth 386 in the region 373. Any of the grooves 320 may be symmetric with respect to the vertical axis y. Therefore, the shape of the groove 320 on each side of the y-axis reflects the shape of the groove 320 on the other side of the y-axis. However, any of the grooves 320 may be asymmetric. The depth 386 represents the maximum depth of the groove 320.

  Referring to FIGS. 10-12, the general cross-sectional shape of the groove 320 may generally remain similar from the top rail 182 to the sole 190. However, the cross-sectional shape including the length, width, and / or depth of each region 371 to region 375 of the groove 320 can gradually change from the top rail 182 to the sole 192. 11 and 12, horizontal sections of the groove 338 and the groove 344 are shown, respectively. For example, the lengths of the regions 371 to 375 of the groove 338 are shorter than the regions 371 to 375 of the groove 332, respectively. Similarly, the region 371 to the region 375 of the groove 344 has a shorter length than the region 371 to the region 375 of the groove 338, respectively. In another example, regions 371 to 375 of groove 338 can each have a shallower depth than regions 371 to 375 of groove 332. Similarly, the regions 371 to 275 of the groove 344 can each have a shallower depth than the regions 371 to 375 of the groove 338.

  The length, depth, and / or width of the regions 371 to 375 of the grooves 322 to 332 gradually increase from the top rail 182 to the center of the ball striking surface 312 and / or the grooves 332 to 344. The size of the regions 371 to 375 gradually decreases from the center of the ball striking surface 312 to the sole 192, thereby forming a central strike zone 360 (shown in FIG. 8). The central strike zone 360 takes an address. When viewed by an individual, it can resemble the shape of a golf ball individually. A rough visual representation of the golf ball can help an individual align the ball striking surface 312 with the ball. The region 373 that defines the deepest portion of the groove 360 is longer in the center of the ball striking surface 312, and can gradually decrease in length toward the top rail 182 and the sole 192. Similarly, the transition region 372 and the transition region 374 have the maximum length at the center of the ball hitting surface 312, and the length can be gradually decreased toward the top rail 182 and the sole 192. The length of the region 371 to the region 375 varies depending on the position of the groove 320 on the ball striking surface 312, but the depth of the similar region of each groove 320 may be the same or different. For example, the maximum depth of the groove 344 may be similar to the maximum depth of the groove 332. Alternatively, the depth of the grooves 322-344 can vary based on the position of the grooves 320 on the ball striking surface 312. Further alternatively, the depth of the grooves 322 to 344 can vary from the top rail 182 to the sole in any manner. While the above examples may describe a specific number of horizontal regions, the devices, methods, and articles of manufacture described herein can include more or less horizontal regions.

  In another embodiment shown in FIG. 13, the ball striking surface 412 includes grooves 420 (specifically shown as grooves 422 to 444). The ball striking surface 412 may be an integral part of the putter face 110 or another part attached to the putter face 110. Accordingly, when describing the ball striking surface 412, the parts of the putter 100 and the putter head 102 are referred to using the same reference numerals as described above.

  FIG. 14 shows a schematic view of the groove 432, and FIG. 15 shows a horizontal section of the groove 432 as seen from the section line 15-15 in FIG. The groove 432 is shown divided into a horizontally extending region 471 and a region 472, which are visible in FIGS. 13 and 14 by the boundary of the groove 432 and the vertical line at the center of the groove 432. Defined. Horizontal region 471 and horizontal region 472 may define a change in horizontal cross-sectional shape of groove 432 from near toe end 180 to near heel end 190 and / or from near top rail 182 to near sole 192. . The horizontal cross-sectional shape of the groove refers to any characteristic of the groove along the length 493 of the groove, such as the length, depth, width, cross-sectional shape, and / or constituent material of a particular portion of the groove. In the embodiment of FIGS. 13-17, the groove 420 includes a first vertical wall 450 and a second vertical wall 452 that define a length 493 of the groove 420. Each of the grooves 420 has a bottom surface 454 that defines the depth of the groove 420. The depth of each groove can vary from the first wall 450 to the second wall 452 according to the cross-sectional shape of the groove 420 in the region 471 and the region 472. Each groove 420 also includes a first horizontal wall 456 and a second horizontal wall 458 that define a vertical boundary of the groove 420. The distance between the first horizontal wall 456 and the second horizontal wall 458 defines the width 480 of the groove 420. The width 480 can vary from the first vertical wall 450 to the second vertical wall 452 as shown in the embodiment of FIGS. However, in the embodiment of FIGS. 13-17, the first horizontal wall 456 and the second horizontal wall 458 are generally parallel to define a generally constant width 480.

  Referring to FIG. 15, the bottom surface 454 in the region 471 has a linear shape and is inclined downward. The groove 450 is symmetric with respect to the central vertical axis y. Therefore, the bottom surface 454 in the region 472 has the same linear shape as the bottom surface 454 in the region 471 and is similarly inclined downward. Accordingly, the depth of the groove 420 gradually increases from the depth 482 at the first wall 452 and the second wall 454 to the depth 484 at the center of the groove 420. Depth 484 represents the deepest portion of groove 420, which may be in the center of groove 420.

  With reference to FIGS. 15-17, the general cross-sectional shape of the groove 420 may generally remain the same from the top rail 182 to the sole 190. However, the cross-sectional shape including the length and / or depth of each region 471 and region 472 of the groove 420 can gradually change from the top rail 182 to the sole 192. For example, the region 471 and the region 472 of the groove 438 are shorter in length than the region 471 and the region 472 of the groove 332, respectively. Similarly, the lengths of the region 471 and the region 471 of the groove 444 are shorter than the region 471 and the region 472 of the groove 438, respectively. In another example, region 471 and region 472 of groove 438 can each have a shallower depth than region 471 and region 472 of groove 432. Similarly, the region 471 and the region 472 of the groove 444 can each have a shallower depth than the region 471 and the region 472 of the groove 438.

  The length, depth, and / or width of the region 471 and the region 472 of the groove 422 to the groove 432 gradually increase from the top rail 182 to the center of the ball striking surface 412, and / or the groove 432 to the groove. The size of the region 471 and the region 472 of 444 gradually decreases from the center of the ball striking surface 412 to the sole 192, thereby forming a central strike zone 460 (shown in FIG. 13). The region 471 and the region 472 have the maximum length at the center of the ball striking surface 412, and the length can be gradually decreased toward the top rail 182 and the sole 192. The lengths of the region 471 and the region 472 vary depending on the position of the groove 420 on the ball striking surface 412, but the depth of the similar region of each groove 420 may be the same or different. For example, the maximum depth of the groove 444 may be similar to the maximum depth of the groove 432. Alternatively, the depth of the grooves 422-444 can vary based on the position of the groove 420 on the ball striking surface 412. Further alternatively, the depth of the grooves 422-444 can vary from the top rail 182 to the sole in any manner. While the above examples may describe a specific number of horizontal regions, the devices, methods, and articles of manufacture described herein can include more or less regions.

  In another embodiment shown in FIG. 18, the ball striking surface 512 includes a groove 520 (specifically shown as groove 522 to groove 544). The ball striking surface 512 may be an integral part of the putter face 110 or another part attached to the putter face 110. Accordingly, when describing the ball striking surface 512, the parts of the putter 100 and the putter head 102 are referred to using the same reference numerals as described above.

  FIG. 19 shows a schematic view of the groove 532, and FIG. 20 shows a horizontal cross section of the groove 532 as viewed from section line 20-20 in FIG. The groove 532 is shown divided into a horizontally extending region 571 and a region 572, which are visible in FIGS. 18 and 19 by the boundary of the groove 532 and the vertical line at the center of the groove 532. Defined. Horizontal region 571 and horizontal region 572 can define a change in horizontal cross-sectional shape of groove 532 from near toe end 180 to near heel end 190 and / or from near top rail 182 to near sole 192. . The horizontal cross-sectional shape of a groove refers to any characteristic of the groove along the length 593 of the groove, such as the length, depth, width, cross-sectional shape, and / or constituent material of a particular portion of the groove. In the example of FIGS. 18-22, the groove 520 includes a first vertical wall 550 and a second vertical wall 552 that define a length 593 of the groove 520. Each of the grooves 520 has a bottom surface 554 that defines the depth of the groove 520. The depth of each groove can vary from the first wall 550 to the second wall 552 in accordance with the cross-sectional shape of the groove 520 between the region 571 and the region 572. Each groove 520 also includes a first horizontal wall 556 and a second horizontal wall 558 that define a vertical boundary of the groove 520. The distance between the first horizontal wall 556 and the second horizontal wall 558 defines the width 580 of the groove 520. The width 580 can vary from the first vertical wall 550 to the second vertical wall 552 as shown in the embodiment of FIGS. However, in the embodiment of FIGS. 18-22, the first horizontal wall 556 and the second horizontal wall 558 are generally parallel to define a generally constant width 580.

  Referring to FIG. 20, the bottom surface 554 in the region 571 has a linear shape and is inclined downward. The bottom surface 554 in region 572 also has a linear shape and slopes downward. However, since the second wall 552 is longer than the first wall 550, the bottom surface 554 in the region 572 has a smaller inclination than the bottom surface 554 in the region 571. Therefore, the groove 550 of this embodiment is asymmetric with respect to the vertical central axis y. Accordingly, the groove 250 has a first depth 582 defined by the first wall 550, a second depth 584 defined by the second wall 552, and a central depth 586, The center depth 586 is gradually reached from the depth 582 and the depth 584 according to the downwardly inclined bottom surfaces 554 of the regions 571 and 572, respectively. The center depth 586 may be the depth of the deepest portion of the groove 520.

  With reference to FIGS. 20-22, the general cross-sectional shape of the groove 520 may generally remain the same from the top rail 182 to the sole 190. However, the cross-sectional shape including the length, width, and / or depth of each region 571 and region 572 of the groove 520 can gradually change from the top rail 182 to the sole 192. 21 and 22 show horizontal cross sections of the groove 538 and the groove 544, respectively. For example, the region 571 and the region 572 of the groove 538 are each shorter in length than the region 571 and the region 572 of the groove 532. Similarly, the region 571 and the region 572 of the groove 544 are shorter in length than the region 571 and the region 572 of the groove 538, respectively. In another example, region 571 and region 572 of groove 538 can each have a shallower depth than region 571 and region 572 of groove 532. Similarly, the region 571 and the region 572 of the groove 544 can each have a shallower depth than the region 571 and the region 572 of the groove 538.

  The length, depth, and / or width of the region 571 and the region 572 of the groove 522 to the groove 532 gradually increase from the top rail 182 to the center of the ball striking surface 512, and / or the groove 532 to the groove. The central strike zone 560 (shown in FIG. 18) is formed by gradually decreasing the size of the region 571 and the region 572 of 544 from the center of the ball striking surface 512 to the sole 192. The region 571 and the region 572 have the maximum length at the center of the ball striking surface 512, and the length can be gradually decreased toward the top rail 182 and the sole 192. The lengths of the region 571 and the region 572 vary depending on the position of the groove 520 on the ball striking surface 512, but the depth of the similar region of each groove 520 may be the same or different. For example, the maximum depth of the groove 544 may be similar to the maximum depth of the groove 532. Alternatively, the depth of the grooves 522-544 can vary based on the position of the grooves 520 on the ball striking surface 512. Further alternatively, the depth of the grooves 522 to 544 can vary from the top rail 182 to the sole in any manner. While the above examples may describe a specific number of horizontal regions, the devices, methods, and articles of manufacture described herein can include more or less horizontal regions.

  The groove 220, groove 320, groove 420, and groove 520 described above illustrate four examples of horizontal cross-sectional shapes of grooves for use with the putter 100. Other examples of horizontal cross-sectional shapes are shown in FIGS. 29-37, where each groove has a length 590, a first depth 591, a second depth 592, and / or a third depth. 593 can be provided. The groove can be defined by any number of horizontal regions, in which case any one or more regions have similar or different characteristics. The groove, which can be symmetric or asymmetric with respect to the y-axis, has a bottom surface with a complex combination of linear or non-linear shapes, for example, and defines similar or varying depths from the toe end 180 to the heel end 190 Can do. Such a groove can be described using multiple horizontal regions, where each region defines one or more of the complex shapes described. Accordingly, the number, arrangement, size, and other characteristics of the horizontal ranges described above do not limit the cross-sectional shape of the groove according to the present disclosure at all.

  In the above embodiment, each corresponding groove on the ball striking surface has a similar shape. However, the grooves on the ball striking surface can have different shapes. For example, the ball striking surface can include a combination of grooves 220 and grooves 320. In another example, the ball striking surface can include a combination of groove 420 and groove 520. Accordingly, any combination of groove cross-sectional shapes can be used on the ball striking surface to impart specific ball striking characteristics to the putter.

  The horizontal cross-sectional shape of the groove can be gradually and proportionally changed from the top rail 182 to the center of the ball hitting surface, and can be gradually changed from the center of the ball hitting surface to the sole 192. The gradual changes described can define a ball strike zone that is larger in the center of the ball striking surface than near the top rail 182 and sole 192. In addition, the gradual stated change in the horizontal cross-sectional shape of the groove is a longer and deeper groove portion around the center of the ball striking surface and the center of the ball striking surface than the grooves near the top rail 182 and the sole 192. Providing a groove having However, the above-described gradual changes in the grooves are exemplary, and other gradual change schemes can be used to impart specific ball striking characteristics to various portions of the ball striking surface.

  Referring to FIG. 23, a ball striking surface 612 according to another embodiment is shown having a groove 620. 24 to 26 show the vertical cross-sectional shape of the groove 620 as seen from the section line 24-24 in FIG. In FIG. 24, the vertical cross-sectional shape of the groove 620 is a box shape, a rectangle, or a square. In FIG. 25, the vertical cross-sectional shape of the groove 620 is V-shaped. In FIG. 26, the vertical cross-sectional shape of the groove 620 is U-shaped. The vertical cross-sectional groove shapes of FIGS. 24-26 are applicable to any groove according to the present disclosure. For example, the vertical cross-sectional shape of the groove 220 may be a rectangle or a square according to the groove 620 of FIG. In another embodiment, the vertical cross-sectional shape of the groove 620 may be V-shaped according to the groove 620 of FIG. Further, the vertical cross-sectional shape of the groove can vary from toe end 180 to heel end 190. For example, referring to FIGS. 4 and 5, the groove 220 has a square or rectangular vertical cross-sectional shape in the region 271 and the region 275, and a U-shaped vertical cross-sectional shape in the region 271 and the region 274. A vertical cross-sectional shape of the mold can be provided in region 273. In addition, the vertical cross-sectional shape of the groove can also vary from the top rail 182 to the sole 190. For example, the groove near the top rail 182 and the sole 192 can have a square vertical cross-sectional shape, while the groove in the center of the club face can have a U-shaped vertical cross-sectional shape.

  The ball hitting surface of the putter in the above embodiment is shown having a groove from the top rail 182 to the sole 192. However, the ball striking surface can have more or fewer grooves, or can have portions without grooves. For example, the ball striking surface can have several grooves in the central portion of the ball striking surface, and there may be no grooves in the portion near the top rail 182 or the sole 192.

  The groove is not limited to extending horizontally across the ball striking surface. The ball striking surface can have a vertical groove of varying depth, as described above, or a combination of vertical and horizontal grooves having a variable horizontal and / or vertical cross-sectional shape. The direction of the grooves may be such that a matrix-like ball striking surface is provided on the putter.

  Referring to FIG. 27, a ball striking surface 712 having a groove 720 can be divided horizontally into three portions, a toe portion 780, a central portion 785, and a heel portion 790. The ball striking surface 712 may be similar to the ball striking surface 212 and the ball striking surface 312 described above. Therefore, the groove 720 has a region 271 to a region 275 and a region 371 to a region 375 similar to the groove 220 and the groove 320 described above, respectively. The three portions described above divide the ball striking surface 712 horizontally and spread vertically from the top rail 182 to the sole 192. Toe portion 780 is near toe end 180, heel portion 790 is near heel end 190, and central portion 785 is between toe portion 780 and heel portion 790. According to various embodiments, the depth of the groove 720 at the toe portion 780 and the heel portion 790 cannot be greater than the depth of the groove 720 at the central portion 785. In one example, the shallowest depth of groove 720, which may be closest to toe end 180 or closest to heel end 190, may be about 0.003 inches. At or near the central portion 785, the depth of the groove 720 can increase to a depth of about 0.017 inches, as described above. The variable depth can include a portion having a depth of at least 0.020 inches but less than 0.022 inches. The variable width can include a portion having a width of at least 0.035 inches but less than 0.037 inches.

  Referring to FIG. 28, the ball striking surface 712 can be divided vertically into three portions, a top rail portion 782, a central portion 786, and a sole portion 792. These portions divide the ball striking surface 712 vertically and spread horizontally from the toe end 180 to the heel end 190. Top rail portion 782 is near top rail 182, sole portion 792 is near sole 192, and central portion 786 is between top rail portion 782 and sole portion 792. The length of the deepest portion of the groove 720 can vary from the top rail portion 782 to the central portion 786 and from the central portion 786 to the sole portion 792. For example, with respect to the embodiments described above, the length of the deepest portion of the groove can refer to the groove 720 located near the center between the top rail portion 782 and the sole portion 792. As shown in FIGS. 27 and 28, the length of the groove 710 can be greatest at the central portion 786 and can gradually decrease toward the top rail portion 782 and toward the sole portion 792.

  29-37 illustrate examples of different groove horizontal cross-sectional shapes according to the present disclosure. In the above embodiment, the widths of the groove 220, the groove 320, the groove 420, and the groove 520 are shown as having a rectangular shape. However, the grooves according to the present disclosure can have different width shapes, as illustrated by the embodiments of FIGS. Thus, the grooves according to the present disclosure can have any horizontal cross-sectional shape, vertical cross-sectional shape, width shape, and / or depth shape.

  The cross-sectional shape of the groove, including variations in the length, depth, width, and / or cross-sectional shape of the groove, can affect the speed, control, and / or rotation of the ball. The disclosed variable depth groove provides about 50% consistency in ball velocity after being struck with a putter face, about 40% over a plastic putter face insert, and about 40% over a grooveless aluminum putter face insert. Can be improved. Hitting a ball with a putter with a groove according to the present disclosure can result in a slower ball speed than (1), thereby reducing the ball rollout distance, and (2) heel strike. And toe hits can result in reduced ball speed compared to center hits and can result in shorter ball rollout distances. (3) Players with relatively mild and severe obstacles Allows the ball to be hit at different positions on the putter face (players with more severe obstacles tend to hit lower on the ball hitting surface, while less Players with a tendency to hit higher on the ball striking surface, and players with relatively severe obstacles can have a wider range of hitting positions, while A player with a degree obstacle can have a narrower range of hit positions and / or (4) a putter face with a groove in the center of the face will reduce ball speed / rollout distance at the center hit. Can result in a more consistent ball speed / rollout distance at center / heel / toe hits.

  Referring to FIG. 46, another embodiment of a putter face 810 having a variable cross-sectional shape groove is shown. Putter face 810 is shown having 14 grooves, which are grooves 822-828 near toe end 180, grooves 830-840 at the center of putter face 810, and near heel end 190. The grooves 842 to 848 are divided into groups. In this embodiment, the more prominent grooves are located at the center of the putter face 810 and the less prominent grooves are around the center. A more prominent groove can refer to a groove having a greater depth and / or width compared to a less prominent groove. As shown in FIG. 46, the grooves 832 to 838 can be more prominent than the remaining grooves of the putter face 810. Further, the portion of the putter face 810 may not have a groove. These parts are referenced using reference number 850.

  Referring to FIG. 47, another embodiment of a putter face 910 having a variable cross-sectional shape groove is shown. Putter face 910 is shown having ten grooves 922 to 940. The length of each groove gradually increases from the top rail 182 to the sole 190. Each of the grooves 922-940 or the group of grooves 922-940 can have different vertical cross-sectional shapes. For example, groove 922-groove 930 is shown with a box-shaped vertical cross-section, while groove 932-groove 940 is shown with a V-shaped vertical cross-section.

  Referring to FIG. 48, a horizontal cross section of a groove 922 according to another embodiment is shown. The bottom surface 954 of the groove 922 is shown decreasing gradually from the groove edge 950 and edge 952 to the maximum depth 951 of the groove 922. Any of the grooves according to the present disclosure may have the same horizontal cross-sectional shape as the groove 922. Any of the grooves according to the present disclosure can have the same depth 951. However, the depth 951 can decrease proportionally as the groove length decreases.

  In another example shown in FIG. 49, the ball striking surface 1012 can include a groove 1220 (specifically shown as groove 1222 to groove 1256). The ball striking surface 1012 may be for use with the putter 100. Accordingly, the parts of the putter 100 and the putter head 102 are referenced using the same reference numbers as those presented above. The groove can have a cross-sectional shape, a length, and a width according to the present disclosure.

  Referring to FIG. 49, a side cross-sectional view of a ball striking surface 1012 having a groove 1220 is shown according to another embodiment. The ball striking surface 1012 can be divided into two parts with respect to the groove 1220. The ball striking surface 1012 can include a top rail portion 1282 and a sole portion 1286. The top rail portion 1282 and the sole portion 1286 divide the ball striking face 1012 vertically and can spread horizontally from the toe end 180 to the heel end 190. The top rail portion 1282 generally extends from the central portion of the ball striking surface 1012 represented by the center line 1284 to near the top rail 182 and can include a groove 1222. The sole portion 1286 generally extends from near the sole 192 to the central portion 1284 and can include a groove 1224. The groove 1224 in the sole portion 1286 can have a greater depth than the groove 1222 in the top rail portion 1282 at one or more locations along each groove 1224. By having a shallower groove 1222 in the top rail portion 1282, the speed at which the golf ball rolls forward after being struck by a putter can be increased to provide a more consistent and smooth ball rollout. . Alternatively, the depth of the groove 1220 can be gradually reduced step by step in one or more grooves from the central portion 1284 to the top rail 182 (not shown). In another example, the depth of the pair of grooves can be gradually reduced from the central portion 1284 to the top rail 182 (not shown). Thus, the decrease in groove depth from sole 192 to top rail 182 may be for each groove, pair of grooves, or various groups of grooves.

  Referring to FIG. 50, the grooves 1224 in the sole portion 1286 can have a depth that is less than the grooves 1222 in the top rail portion 1282 at one or more locations along each groove 1224. Alternatively, the depth of the groove 1220 can gradually increase in steps in one or more grooves from the central portion 1284 and / or the sole 192 to the top rail 182 (not shown). In another embodiment, the depth of the pair of grooves can gradually increase from the central portion 1284 and / or the sole 192 to the top rail 182 (not shown). Thus, the increase in groove depth from the central portion 1284 and / or the sole 192 to the top rail 182 may be for each groove, pair of grooves, or various groups of grooves.

  51 and 52 illustrate another embodiment according to the present disclosure. Referring to FIG. 51, the putter head 1300 includes a ball striking surface 1312 having a plurality of horizontal grooves 1320 and vertical grooves 1322. Each of the grooves 1320 and 1322 has a different configuration from the toe end 1380 to the heel, such as variable cross-sectional shape, depth shape, width shape, length shape, and / or other groove characteristics. It may have near end 1390 and / or from top rail 1382 to sole 1392. For example, the depth of the horizontal groove 1320 can increase stepwise in one or more grooves from the top rail 1382 to the sole 1386. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  Referring to FIG. 52, the putter head 1400 includes a ball striking surface 1412, and the ball striking surface 1412 has a plurality of first oblique grooves 1420 and second oblique grooves 1422. The first diagonal grooves 1420 may be generally parallel to one another. Similarly, the second diagonal grooves 1422 may be generally parallel to one another. The first diagonal grooves 1420 and the second diagonal grooves 1422 may cross each other as shown in FIG. For example, the first diagonal groove 1420 can intersect the second diagonal groove 1422 at an angle of 30 °, 45 °, 60 °, or 90 °. Each of the grooves 1420 and 1422 has a different configuration from the toe end 1480 to the heel, such as variable cross-sectional shape, depth shape, width shape, length shape, and / or other groove characteristics. It may have near end 1490 and / or from top rail 1482 to sole 1492. For example, the depth of the first diagonal groove 1420 can gradually increase from the top rail 1482 to the sole 1486 in steps in one or more grooves. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  Referring to FIG. 52, a process 2000 for manufacturing a golf club head according to one embodiment is illustrated. Process 2000 includes forming a golf club face defined by a toe end, a heel end, a top rail, and a sole (block 2002). A golf club face can be formed with a golf club head such that the golf club head and golf club face are one continuous portion. Alternatively, the golf club head and golf club face can be formed separately. The golf club face can then be attached to the golf club face by using adhesives, tape, welding, soldering, fasteners, and / or other suitable methods and devices. The golf club head and / or golf club face can be manufactured from any material. For example, the golf club head and / or golf club face may be titanium, titanium alloy, other titanium-based materials, steel, aluminum, aluminum alloys, other metals, metal alloys, plastic, wood, composite materials, or other suitable It can be made from any kind of material. Golf club heads and / or golf club faces are stamped (ie, punched, blanked, stamped, bent, flanged, or stamped, casted using a mechanical or stamping press), injection molded, forged Formed using various processes, such as machining, or combinations thereof, other processes used to manufacture metal, plastic, and / or composite parts, and / or other suitable processes obtain. In one example, when manufacturing a putter head, the putter face and / or ball striking surface material may be determined to provide the ball with specific ball striking and rolling characteristics. In another embodiment, the ball striking surface 212 is separate from the putter face 110 and when it is inserted and mounted in a correspondingly shaped recess on the putter face 110, the striking surface 212 is placed over the putter face 110. Made from a light material, the total weight of the putter can generally be reduced.

  According to process 2000, grooves are formed on the club face and / or club head between the top rail and the sole, each groove extending between the toe end and the heel end, the groove depth being the top rail. And a direction extending between the heel end and the toe end (block 2004). The grooves can be formed using various processes such as casting, forging, machining, rotary milling, and / or other suitable processes. The vertical cross-sectional shape of the groove can depend on the method of manufacturing the groove. For example, the type of cutting bit when machining a groove can determine the vertical cross-sectional shape of the groove. The vertical cross-sectional shape of the groove may be a contrast, such as the embodiment described above, or may be asymmetric (not shown). In one example, the width of the groove may be 0.032 inches, which may be the width of the cutting bit. Thus, when machining a groove, the shape and dimensions of the cutting bit can determine the shape and dimensions of the groove.

  The grooves can be manufactured by rotary milling the ball striking surface or by stamping or forging the grooves into the ball striking surface. Grooves can also be manufactured directly on the putter head so that the ball striking surface described above is made directly on the putter head. The grooves can be manufactured by press molding the grooves onto a putter head. For example, the press can deform and / or move the material on the putter head to create a groove. The grooves can be produced by a milling process, in which case the axis of rotation of the milling tool is perpendicular to the putter face. The axis of rotation of the milling tool can be oriented at an angle other than perpendicular to the putter face. The grooves can be manufactured by overlaying a single material that has been cleanly cut to form a through groove on a base material or a solid material. The grooves can be produced by etching or eroding the putter face material with a laser and / or heat. The grooves can be manufactured by chemically eroding the putter face material using a photosensitive mask. The grooves can be manufactured by electronic / chemical erosion of the putter face material using a chemical mask such as wax or petrochemical. The grooves can be manufactured by abrading the face material using air or water as a carrier medium for the wear material such as sand. Any one or combination of the methods described above can be used to produce one or more of the grooves on the putter head. In addition, other methods used to create indentations in any material can be used to manufacture the grooves.

  Referring to FIG. 54, a ball striking surface 2212 according to another embodiment is shown. The ball striking surface 2212 can be divided vertically into three parts and can be defined by three parts: a top rail portion 2282, a central portion 2286, and a sole portion 2292. The top rail portion 2282, the central portion 2286, and the sole portion 2292 divide the ball striking surface 2212 vertically and extend horizontally from the toe end 180 to the heel end 190. Top rail portion 2282 is near top rail 182, sole portion 2292 is near sole 192, and central portion 2286 is between top rail portion 2282 and sole portion 2292. In FIG. 54, the ball striking surface 2212 can have twelve grooves 2222 to 2244, which can be collectively referred to as grooves 2220. For example, the groove 2222, the groove 2224, the groove 2226, and the groove 2228 can be considered in the top rail portion 2282, and the groove 2230, the groove 2232, the groove 2234, and the groove 2236 are in the central portion 2286. The groove 2238, the groove 2240, the groove 2242, and the groove 2244 can be considered to be in the sole portion 2292. However, one or more of the grooves 2220 can be considered to be within two adjacent portions of the three vertically separated portions, i.e., a portion of the groove 2220 overlaps an adjacent portion. The length of the groove 2220 may be greatest at the central portion 2286 and may gradually decrease toward the top rail portion 2282 and toward the sole portion 2292. Alternatively, the length of the groove 2220 can vary according to the peripheral shape of the ball striking surface 2212. The top rail portion 2282, the central portion 2286, and the sole portion 2292 are exemplary and can define portions on the ball striking surface 2212, and one or more grooves 2220 that can be disposed in such portions. It has the same structure or characteristic. Thus, the ball striking surface 2212 can be defined by various vertical and / or horizontal portions that are associated with one or more groove configurations or features. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  FIG. 55 shows a horizontal cross section of the ball striking surface 2212 in the groove 2234. Each groove 2220 can include a central portion 2254 having a bottom surface 2255, and the bottom surface 2255 can define a maximum depth 2257 of the groove 2220. The central portion 2254 has a length 2259 that can vary depending on the position of the groove 2220 on the ball striking surface 2212. In the embodiment of FIG. 54, the central portion 2254 of the groove 2220 in the central portion 2286 generally has the same length. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  The center of the ball striking surface 2212 can be defined by the y-axis 2261. The y-axis 2261 can also define the central axis of the central portion 2254, as shown in FIGS. However, the central portion 2254 may be offset (not shown) with respect to the y-axis 2261. According to the embodiment of FIG. 55, the bottom surfaces 2255 of the grooves 2230, 2232, 2234, and 2236 are substantially equal from the y-axis 2261 toward the toe end 180 and toward the heel end 190. extend. As shown in FIG. 55, the distance between the y-axis 2261 and the toe edge portion 2264 of the central portion 2254 can be defined as a length 2262. A toe edge portion 2264 can be defined as the portion of the groove between the y-axis 2261 and the toe end 190, the groove depth increasing from the depth 2257 and transitioning toward the opening or top of the groove. The distance between the y-axis 2261 and the heel edge portion 2268 of the central portion 2254 can be defined as a length 2266. The heel edge portion 2268 may be defined as the portion of the groove between the y-axis 2261 and the heel end 180, the groove depth increasing from the depth 2257 and transitioning toward the groove opening or top. . According to the embodiment of FIGS. 54 and 55, length 2262 is substantially the same as length 2266. A putter having a ball striking surface 2212 shown in FIG. 54 may be appropriate for an individual having a straight put stroke.

  Referring to FIG. 56, a ball striking surface 3212 according to another embodiment is shown. The ball striking surface 3212 can be divided vertically into three parts and can be defined by three parts, a top rail portion 3282, a central portion 3286, and a sole portion 3292. The top rail portion 3282, the central portion 3286, and the sole portion 3292 divide the ball striking surface 3212 vertically and extend horizontally from the toe end 180 to the heel end 190. Top rail portion 3282 is near top rail 182, sole portion 3292 is near sole 192, and central portion 3286 is between top rail portion 3282 and sole portion 3292. In FIG. 56, the ball striking surface 3212 can have twelve grooves 3222 to 3244, which can be collectively referred to as grooves 3220. For example, the groove 3222, the groove 3224, the groove 3226, and the groove 3228 can be considered in the top rail portion 3282, and the groove 3230, the groove 3232, the groove 3234, and the groove 3236 are in the central portion 3286. The groove 3238, the groove 3240, the groove 3242, and the groove 3244 can be considered to be in the sole portion 3292. However, one or more of the grooves 3220 are considered to be within two adjacent portions of the three vertically separated portions, ie, a portion of the groove 3220 overlaps the adjacent portions. Can do. The length of the groove 3220 may be greatest at the central portion 3286 and may gradually decrease toward the top rail portion 3282 and toward the sole portion 3292. Alternatively, the length of the groove 3220 can vary according to the peripheral shape of the ball striking surface 3212. The top rail portion 3282, the central portion 3286, and the sole portion 3292 are exemplary and can define a portion on the ball striking surface 3212 and there can be one or more grooves 3220 that can be disposed within such portion. It has a plurality of similar configurations or features. Thus, the ball striking surface 3212 can be defined by various vertical and / or horizontal portions that are associated with one or more groove configurations or features. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  FIG. 57 shows a horizontal cross section of the ball hitting surface 3212 in the groove 3234. Each groove 3220 can include a central portion 3254 having a bottom surface 3255, and the bottom surface 3255 can define a maximum depth 3257 of the groove 3220. The central portion 3254 has a length 3259 that can vary depending on the position of the groove 3220 on the ball striking surface 3212. In the embodiment of FIG. 56, the central portion 3254 of the groove 3220 of the central portion 3286 generally has the same length. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  The center of the ball striking surface 3212 can be defined by the y-axis 3261. The y-axis 3261 can also define the central axis of the central portion 3254 shown in FIGS. However, the central portion 3254 may be offset (not shown) with respect to the y-axis 3261. 57, each of the groove 3230, the groove 3232, the groove 3234, and the bottom surface 3255 of the groove 3260 is longer from the y-axis 3261 toward the toe end 180 than the bottom surface 2255 of the groove 2234 of FIG. It grows. As shown in FIG. 57, the distance between the y-axis 3261 and the toe edge portion 3264 of the central portion 3254 can be defined as a length 3262. A toe edge portion 3264 can be defined as the portion of the groove between the y-axis 3261 and the toe end 190, the groove depth increasing from depth 3257 and transitioning to the top of the opening or groove. The distance between the y-axis 3261 and the heel edge portion 3268 of the central portion 3254 can be defined as a length 3266. The heel edge portion 3268 can be defined as the portion of the groove between the y-axis 3261 and the heel end 180, the groove depth increasing from the depth 3257 and transitioning to the opening or top of the groove. . According to the embodiment of FIG. 57, the length 3262 is longer than the length 2266 of FIG. The length 3262 may also be longer than the length 3266. Alternatively, the length 3262 may be substantially similar to the length 3266, but longer than the length 2266 of FIG. Therefore, the deepest portion of a part or all of the groove 3220 of the ball striking surface 3212 of FIG. 56 extends toward the toe end 190 more than the deepest portion of the groove 2220 of the ball striking surface 2212 of FIG. A putter having a ball striking surface 3212 as shown in FIG. 56 may be appropriate for an individual having a slightly arcing put stroke.

  Referring to FIG. 58, a ball striking surface 4212 according to another embodiment is shown. The ball striking surface 4212 can be divided vertically into three parts and can be defined by three parts, a top rail part 4282, a central part 4286, and a sole part 4292. The top rail portion 4282, the central portion 4286, and the sole portion 4292 divide the ball striking surface 4212 vertically and extend horizontally from the toe end 180 to the heel end 190. Top rail portion 4282 is near top rail 182, sole portion 4292 is near sole 192, and central portion 4286 is between top rail portion 4282 and sole portion 4292. In FIG. 58, the ball striking surface 4212 can have twelve grooves 4222 to 4244, which can be collectively referred to as grooves 4220. For example, the groove 4222, the groove 4224, the groove 4226, and the groove 4228 can be considered in the top rail portion 4282, and the groove 4230, the groove 4232, the groove 4234, and the groove 4236 are in the central portion 4286. The groove 4238, the groove 4240, the groove 4242, and the groove 4244 can be considered to be in the sole portion 4292. However, one or more of the grooves 4220 can be considered to be within two adjacent portions of the three vertically separated portions, ie, a portion of the groove 4220 overlaps the adjacent portions. . The length of the groove 4220 may be greatest at the central portion 4286 and may gradually decrease toward the top rail portion 4282 and toward the sole portion 4292. Alternatively, the length of the groove 4220 can vary according to the peripheral shape of the ball striking surface 4212. The top rail portion 4282, the central portion 4286, and the sole portion 4292 are exemplary and can define a portion on the ball striking surface 4212 and there can be one or more grooves 4220 that can be disposed within such portion. It has a plurality of similar configurations or features. Thus, the ball striking surface 4212 can be defined by various vertical and / or horizontal portions that are associated with one or more groove configurations or features. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  FIG. 59 shows a horizontal cross section of the ball striking surface 4212 in the groove 4232. Each groove 4220 can include a central portion 4254 having a bottom surface 4255, and the bottom surface 4255 can define a maximum depth 4257 of the groove 4220. The central portion 4254 has a length 4259 that can vary depending on the position of the groove 4220 on the ball striking surface 4212. In the embodiment of FIG. 58, the central portion 4254 of the groove 4220 of the central portion 4286 generally has the same length. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  The center of the ball striking surface 4212 can be defined by the y-axis 4261. The y-axis 4261 can also define the central axis of the central portion 4254 shown in FIGS. However, the central portion 4254 may be offset (not shown) with respect to the y-axis 4261. 59, the bottom surfaces 4255 of the grooves 4230, 4232, 4234, and 4236 are each longer than the bottom surface 3255 of the groove 3234 of FIG. 56 from the y-axis 4261 toward the toe end 180. It grows at. As shown in FIG. 59, the distance between the y-axis 4261 and the toe edge portion 4264 of the central portion 4254 can be defined as a length 4262. A toe edge portion 4264 may be defined as the portion of the groove between the y-axis 4261 and the toe end 190, the groove depth increasing from the depth 4257 and transitioning to the groove opening. The distance between the y-axis 4261 and the heel edge portion 4268 of the central portion 4254 can be defined as a length 4266. The heel edge portion 4268 may be defined as the portion of the groove between the y-axis 4261 and the heel end 180, the groove depth increasing from the depth 4257 and transitioning to the groove opening. According to the embodiment of FIG. 59, the length 4262 is longer than the length 3266 of FIG. 57 and therefore longer than the length 2266 of FIG. The length 4262 may be longer than the length 4266. Alternatively, the length 4262 may be substantially similar to the length 4266, but longer than the length 3266 of FIG. Therefore, the deepest part of the groove 4220 of the ball striking surface 4212 in FIG. 58 extends toward the toe end 190 more than the deepest portion of the groove 3220 in the ball striking surface 3212 in FIG. A putter having a ball striking surface 4212 shown in FIG. 58 may be appropriate for an individual having a pat stroke that draws a strong arc.

  According to the embodiment of FIGS. 54-59, the grooves on the putter can be configured to optimize an individual's ability based on the individual's putting stroke. Depending on the degree of arcing in a person's put stroke, any of the grooves described herein may be provided on the putter so that some portion of all of the grooves generally define the depth of the groove. , Extending from the center of the putter's striking surface to the toe end with a specific length to optimize the individual's ability when using the putter. Accordingly, the length of the deepest portion of the groove can be proportional to the degree of arcing in the individual pad stroke. For example, for an individual having a pat stroke between a strongly arcing and slightly arcing pat stroke, the portion of the groove that generally defines the groove depth is from the y-axis toward the toe end 190. The ball hitting surface 3212 is longer than the groove 3230, the groove 3232, the groove 3234, and the groove 3236, but is shorter than the groove 4230, the groove 4232, the groove 4034, and the groove 4036 of the ball hitting surface 4212, and can extend. In the embodiment of FIGS. 54-59, the groove portion of the central portion of the striking surface that defines the groove depth will vary based on the type of pad stroke of the individual. However, all of the grooves on the striking surface, including the grooves between the top rail portion and the sole portion, can be configured according to the above embodiment based on the type of individual pad stroke. Further, the grooves according to the embodiments of FIGS. 54-59 can have any shape or configuration. For example, the ball striking surface according to the embodiment of FIGS. 54 to 59 has a groove cross-sectional shape according to the embodiment of the groove of FIGS. Can have. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  The golf club head, ball striking surface, and / or groove according to the embodiment of FIGS. 54-59 may be produced by any of the methods and / or materials described herein. And can be manufactured. Each groove may have a width of about 0.032 inches (0.081 cm) and have a depth between about 0.003 inches (0.008 cm) and about 0.017 inches (0.043 cm). Can have. As described in detail herein, any of the ball striking surface 2212, ball striking surface 3212, or ball striking surface 4212 is in the form of a golf club head or insert into a correspondingly shaped recess in the golf club head. It may be. The insert may be coplanar with the rest of the face of the golf club head that may define a reference plane. Accordingly, the groove of the ball striking surface is in the golf club head or below the reference surface. Alternatively, all or part of the insert can protrude from the reference surface such that all or part of the groove is located above the reference surface. By having a ball striking surface that can be replaced by one or more golf clubs, such as putters, the ball striking surface of the golf club head is made up of another ball based on its own putt style to improve individual performance. Can be replaced with a hitting surface. For example, an individual whose putt style has changed during a certain period will replace his putter's ball striking surface with another ball striking surface according to the present disclosure so that the putter better fits the individual's current putting style. Can be. Instead of having a replaceable ball striking surface, any of the grooves described herein, including the exemplary grooves of FIGS. 54-59, can be manufactured on a golf club head. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  In another embodiment shown in FIG. 60, the ball striking surface 5212 can include grooves 5220 (shown specifically as grooves 5222 to 5244). The ball striking surface 5212 may be an integral part of the putter face 110 or another part attached to the putter face 110. Accordingly, when describing the ball striking surface 5212, the parts of the putter 100 and the putter head 102 are referred to using the same reference numerals as described above. As with the other embodiments described herein, the depth, length, and / or width of each groove 5220 may vary from the toe end 180 to the heel end 190 and / or from the top rail 182 of the putter head 102. It can increase, decrease and / or change over the sole 192. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  61 shows a schematic plan view of the groove 5232, and FIG. 62 shows a horizontal section of the groove 5232 in order to illustrate the configuration of the groove 5220 described below. Each of the grooves 5220 includes a first horizontal wall 5256 and a second horizontal wall 5258 that define the vertical boundary of the groove. Each groove 5220 can also include a first end wall 5250 and a second end wall 5252. Each of the grooves 5220 has a bottom surface 5254 that defines a depth 5255 of the groove 5220. The depth 5255 of each groove 5220 can vary from the first wall 5250 to the second wall 5252. The grooves 5220 may not have end walls because the depth of each groove 5220 may gradually decrease until the bottom surface 5254 touches the ball striking surface 5212. The distance between the first horizontal wall 5256 and the second horizontal wall 5258 at any position along the groove defines the width 5280 of the groove 5220 at that position. The distance between the first end wall 5250 and the second end wall 5252 defines the length 5293 of the groove 5220.

  The change in the depth 5255 of each groove 5220 relative to the change in the width 5280 of each groove 5220 may depend on the cutting tool used to manufacture the groove 5220. According to one embodiment, the change in groove width may be similar to the change in groove depth along the length of the groove. For example, for every 1 mm increase in groove depth, the groove width also increases by 1 mm. According to another embodiment, the depth of the groove may vary by a multiple of the change in groove width along the length of the groove. For example, for every 1 mm increase in groove depth, the groove width increases by 0.5 mm. Thus, the change in the depth of each groove can be linearly related to the change in the width of each groove along the length of each groove.

  FIG. 63 shows an exemplary cutting bit 5300 having a cutting blade 5301 for cutting a groove in the material. The machine rotates the cutting bit 5300 so that the cutting blade 5301 can puncture the material, and the machine moves the material to be cut or moves the cutting bit 5300 to move the groove into the path of travel. Make along. The cutting bit 5300 has an angle 5302 that defines the angle 5304 of the groove that is cut by the cutting blade 5301, as shown in FIGS. 64 and 65. The exemplary cutting bit of FIG. 63 has an angle 5302 of about 90 °, which can cut the groove shown in FIG. 65 at an angle 5304 of about 90 °. FIG. 64 shows a groove having a groove angle 5304 of about 60 °. The cutting bit (not shown) for cutting the groove of FIG. 64 has a cutting bit having an angle of about 60 °.

  When the depth of each groove is indicated by y, the width of each groove is indicated by x, and the angle of the cutting blade is indicated by α, the relationship between the depth of each groove and the width of each groove along the length of each groove is as follows. Can be represented by

  The change in width of each groove with respect to the depth of each groove along the length of the groove can be represented by:

  According to equation (2), when the cutting blade 5301 has an angle of about 90 °, the groove width varies by a factor of 2 along the groove length with respect to the groove depth. For example, for every 1 mm increase in groove depth, the groove width increases by 2 mm. When the cutting blade has an angle of 60 °, the groove width varies by about 1.15 times the groove depth. For example, for every 1 mm increase in groove depth, the groove width increases by 1.15 mm. When the cutting blade has an angle of 30 °, the groove width varies by about 0.54 times the groove depth. For example, for every 1 mm increase in groove depth, the groove width increases by about 0.54 mm. Thus, cutting each groove using a cutting tool provides a groove having a width and depth that varies linearly with respect to each other along the length of the groove.

  According to equation (2), the groove width shape shown in FIG. 61 may be similar to the groove depth shape according to FIG. In other words, as the groove deepens from one end wall 5250 or end wall 5252 to the central portion of the groove, the width of the groove also increases by a factor related to the angle of the groove or the angle of the cutting tool. Thus, the groove width varies linearly with changes in groove depth along the groove length, and the groove width and depth shapes may be similar.

  According to equation (2), the change in groove depth with respect to the change in groove width is linear. However, the change in groove depth relative to the change in groove width may be constant or non-linear. Using one or more cutting tools for manufacturing the groove, the depth of the groove can be varied according to a non-linear relationship to changes in the width of the groove. For example, the change in groove depth with respect to the change in groove width can be defined by the following equation:

  According to equation (3), the groove width is twice the square root of the groove depth and can be represented by the following equation:

  Thus, the relationship between changes in groove depth and width may be non-linear. According to another embodiment, the depth and / or cross-sectional shape of the groove can vary, but the width of the groove can remain constant. For example, the groove may have a square cross-sectional shape where the groove depth varies from one end of the groove to the other end of the groove while the groove width remains constant. According to another embodiment, the width of the groove may remain constant from one end of the groove to the other end of the groove, but the cross-sectional shape and / or depth of the groove may vary from one end of the groove to the other of the groove. It can change over the edges. According to another embodiment, the depth of the groove may remain constant from one end of the groove to the other end of the groove, but the width of the groove varies from one end of the groove to the other end of the groove. And / or remain constant.

  According to another embodiment shown in FIGS. 66 and 67, the depth 5355 of the groove 5320 may be constant along a portion of the groove, such as the central portion 5356 of the groove. Accordingly, the groove width 5380 is also constant along the central portion of the groove 5356, as described in detail above. To produce the groove 5320 of FIGS. 66 and 67, a cutting tool, such as the cutting tool 5300, is used at a constant depth 5355 in the central portion 5356 of the groove, and thus constant in the central portion 5356 of the groove 5320. Results in a width of 5380.

  A groove area with deeper and wider grooves near the center of gravity of the putter can provide a faster predicted ball speed, while a shallower and narrower groove area near the toe and heel parts A slower predicted ball speed can be provided. In addition, the larger groove width and depth in the center portion of the putter can reduce the mass at the contact point with the golf ball, thereby allowing the ball speed to be considered equivalent by considering the mass points at each possible contact point. Is normalized within the putter face so that hitting off-center, toe, heel, high, or low hits will generally result in the same ball speed as hitting the center of the putter face.

  The cutting tool of FIG. 63 is an exemplary cutting tool. Other cutting tools having different shapes can be used, thus resulting in differently shaped grooves. The cutting tool of FIG. 63 is V-shaped, which results in a V-shaped groove. However, a U-shaped cutting tool (not shown) can result in a U-shaped groove. According to one embodiment, a cutting tool with a flat tip or tip can be used to produce a groove with a flat bottom. For example, the cutting tool may be a V-shaped cutting tool having a flat tip instead of a pointed tip. Therefore, a V-shaped groove having a flat bottom can be manufactured. Thus, the bottom of the groove may be substantially from a point (ie, having little width) to the same width as the width of the groove (ie, a rectangular or square cross-sectional groove shape). According to one embodiment, the bottom of the groove may be flat and may have a width of about 0.003 inches (0.0076 centimeters). A groove having a flat bottom can improve the pad ability. The grooves can be manufactured by using one cutting tool or multiple cutting tools as described above. For example, a plurality of cutting tools can be used to produce a groove and provide different groove cross-sectional shapes and / or dimensions from one end of the groove to the other end of the groove.

  Because the rules of golf can change from time to time (e.g., new rules can be adopted or old rules can be abolished or changed by a golf standards organization or operating organization), the methods, apparatus, and devices described herein, A golf article associated with an article of manufacture may be compliant or non-compliant with golf rules at any particular time. Accordingly, golf equipment associated with the methods, apparatus, and / or articles of manufacture described herein can be advertised, marketed, and / or sold as conforming or non-conforming golf equipment. The methods, apparatus, and / or articles of manufacture described herein are not limited in this respect.

  Although a specific sequence of operations has been described above, these operations can be performed in other time series. For example, two or more operations described above can be performed sequentially, simultaneously, or simultaneously. Alternatively, two or more operations can be performed in the opposite order. Furthermore, one or more of the operations described above may not be performed at all. The devices, methods, and articles of manufacture described herein are not limited in this respect.

  While the invention has been described in connection with various aspects, it will be understood that the invention may be further modified. This application is generally intended to cover any variations, uses, or adaptations of the invention in accordance with the principles of the invention and is known and customary within the skill of the art related to the invention. Deviations from this disclosure, such as included in certain acts.

Claims (18)

A golf club head,
A body portion having a body center region, a body toe portion, a body heel portion, a body top rail portion, and a body sole portion;
A club face of the body portion, comprising a groove extending from a central portion of the club face toward the body heel portion and from the central portion of the club face toward the body toe portion. Club face,
A depth of at least one groove extending along the face-back direction;
A length of at least one groove extending along the heel-toe direction;
The width of at least one groove extending along the top rail-sole direction;
With
Each groove has a width portion defining a maximum width of the groove, the width portion has a width portion length extending along a direction from the body heel portion toward the body toe portion;
The width of each groove increases from the groove heel portion toward the width portion,
The width of each groove increases from the groove toe part toward the width part ,
Each groove has a depth portion defining a maximum depth of the groove, and the depth portion has a depth portion length extending along a direction from the body heel portion toward the body toe portion;
The change in depth of at least one groove along the length of the groove is linear with respect to the change of width of the at least one groove along the length of the groove;
The depth of each groove increases from the groove heel portion toward the depth portion;
A golf club head , wherein the depth of each groove increases from the groove toe portion toward the depth portion . The depth portion length of at least two of the grooves located between the body top rail portion and the body central region increases from the body top rail toward the central region;
The golf according to claim 1 , wherein the depth portion length of at least two of the grooves located between the body sole portion and the body central region increases from the body sole portion toward the central region. Club head.   The golf club head of claim 1, wherein the width of at least two of the grooves varies between the body top rail portion and the body sole portion. A golf club head,
A body portion having a body center region, a body toe portion, a body heel portion, a body top rail portion, and a body sole portion;
A club face of the body portion, comprising a groove extending from a central portion of the club face toward the body heel portion and from the central portion of the club face toward the body toe portion. Club face,
A depth of at least one groove extending along the face-back direction;
A length of at least one groove extending along the heel-toe direction;
The width of at least one groove extending along the top rail-sole direction;
With
Each groove has a width portion defining a maximum width of the groove, the width portion has a width portion length extending along a direction from the body heel portion toward the body toe portion;
The width of each groove increases from the groove heel portion toward the width portion,
The width of each groove increases from the groove toe part toward the width part,
At least one groove, the along the length of the groove, the change in the width, of at least one groove, the along the length of the groove, relative to the change in depth, Ru linear der, Golf Club head. The at least one groove has a V-shaped cross section;
The width change of at least one groove along the length of the groove is about 1.15 times the depth change of the at least one groove along the length of the groove. The golf club head of claim 1, which varies. The golf club head of claim 1 , wherein the at least one groove has a flat bottom. At least two cross-sectional configuration of said grooves, between the between the body heel portion and the Bodito portion or said body top rail portion and the body sole portion, varies in at least one of, claims Item 4. The golf club head according to Item 1 . The golf club head of claim 1 , wherein the club face is removably attached to the body portion. 2. The golf club head according to claim 1 , wherein the depth of the groove increases in a direction from the body top rail portion toward the central portion and in a direction from the body sole portion toward the central portion. A golf club head,
A body portion having a body center region, a body toe portion, a body heel portion, a body top rail portion, and a body sole portion;
A club face on the body portion comprising a groove extending from a central portion of the club face toward the body heel portion and from the central portion of the club face toward the body toe portion. The upper club face,
A depth of at least one groove extending along the face-back direction;
A length of at least one groove extending along the heel-toe direction;
The width of at least one groove extending along the top rail-sole direction;
With
Each groove has a width portion defining a maximum width of the groove, the width portion has a width portion length extending along a direction from the body heel portion toward the body toe portion;
The width of at least two of the grooves varies between the body top rail portion and the body sole portion ;
Each groove has a depth portion defining a maximum depth of the groove, and the depth portion has a depth portion length extending along a direction from the body heel portion toward the body toe portion;
The change in depth of at least one groove along the length of the groove is linear with respect to the change of width of the at least one groove along the length of the groove;
The depth of each groove increases from the groove heel portion toward the depth portion;
A golf club head , wherein the depth of each groove increases from the groove toe portion toward the depth portion . The depth portion length of at least two of the grooves located between the body top rail portion and the body central region increases from the body top rail toward the central region;
The golf according to claim 10 , wherein the depth portion lengths of at least two of the grooves located between the body sole portion and the body center region increase from the body sole portion toward the center region. Club head. The width of each groove increases from the groove heel portion toward the width portion,
The golf club head of claim 10 , wherein the width of each groove increases from the groove toe portion toward the width portion. A golf club head,
A body portion having a body center region, a body toe portion, a body heel portion, a body top rail portion, and a body sole portion;
A club face on the body portion comprising a groove extending from a central portion of the club face toward the body heel portion and from the central portion of the club face toward the body toe portion. The upper club face,
A depth of at least one groove extending along the face-back direction;
A length of at least one groove extending along the heel-toe direction;
The width of at least one groove extending along the top rail-sole direction;
With
Each groove has a width portion defining a maximum width of the groove, the width portion has a width portion length extending along a direction from the body heel portion toward the body toe portion;
The width of at least two of the grooves varies between the body top rail portion and the body sole portion;
The change in width of at least one groove along the length of the groove is linear with respect to the change in depth of the at least one groove along the length of the groove;
The width of each groove increases from the groove heel portion toward the width portion,
A golf club head, wherein the width of each groove increases from a groove toe portion toward the width portion. The at least one groove has a V-shaped cross section;
The width change of at least one groove along the length of the groove is about 1.15 times the depth change of the at least one groove along the length of the groove. The golf club head of claim 10, which varies. The golf club head of claim 10 , wherein the at least one groove has a flat bottom. At least two cross-sectional configuration of said grooves, between the between the body heel portion and the Bodito portion or said body top rail portion and the body sole portion, varies in at least one of, claims Item 11. A golf club head according to Item 10 . The golf club head of claim 10 , wherein the club face is removably attached to the body portion. The golf club head according to claim 10 , wherein the depth of the groove increases in a direction from the body top rail portion toward the center portion and in a direction from the body sole portion toward the center portion.

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