Progressive grooves in golf club heads
Customized groove profiles in golf club heads for varying loft angles and swing speeds ensure consistent spin and improved ball flight across different conditions, resolving issues of unpredictable spin in conventional clubs.
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- ACUSHNET CO
- Filing Date
- 2025-11-25
- Publication Date
- 2026-06-11
AI Technical Summary
Conventional golf club sets experience unpredictable spin levels and inconsistent ball flight due to varying conditions, particularly in higher lofted clubs when hitting from rough or wet conditions, leading to issues like 'fliers' and excessive spin.
A set of golf club heads with distinct groove profiles tailored for different loft angles, featuring unique cross-sectional designs for lower and higher swing speed golfers, ensuring consistent spin levels across varying conditions.
The customized groove profiles maintain desired spin levels and improve ball flight consistency regardless of lie conditions, addressing spin loss in rough or wet conditions while preventing excessive spin in fairway shots.
Smart Images
Figure US20260158340A1-D00000_ABST
Abstract
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This patent application is a continuation-in-part of U.S. patent application Ser. No. 19 / 181,847, filed Apr. 17, 2025, which is a continuation-in-part of U.S. patent application Ser. No. 18 / 652,681, filed May 1, 2024, each of which is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION
[0002] The present invention relates to golf clubs. In particular, the present invention relates to golf club heads having improved striking surfaces. The striking surfaces include grooves having certain cross-sectional profiles based on the loft of the golf club head.BACKGROUND OF THE INVENTION
[0003] Golf club heads come in many different forms and makes, such as wood-or metal-type, iron-type (including wedge-type club heads), utility-or specialty-type, and putter-type. Each of these styles has a prescribed function and make-up.
[0004] Iron-type and utility-type golf club heads generally include a front or striking face, a top line, and a sole. The front face interfaces with and strikes the golf ball. A plurality of grooves, sometimes referred to as “score lines,” is provided on the face to assist in imparting spin to the ball. The top line is generally configured to have a particular look to the golfer and to provide structural rigidity for the striking face. A portion of the face may have an area with a different type of surface treatment that extends fractionally beyond the score line extents. Some club heads have the surface treatment wrap onto the top line. The sole of the golf club is particularly important to the golf shot because it contacts and interacts with the ground during the swing.
[0005] In conventional sets of iron-type golf clubs, each club includes a shaft with a club head attached to one end and a grip attached to the other end. The club head includes a face for striking a golf ball. The angle between the face and a vertical plane is called the loft angle.
[0006] An important aspect of golf is to be able to produce a desired amount of spin on the golf ball. It is also desirable to have predictable spin levels for each club within a set of clubs. Typically, higher lofted clubs in a set will produce more spin. Hitting shots out of longer grass (the “rough”) or in wet conditions can cause a significant reduction in spin resulting in unpredictable ball flight and inconsistent carrying distances. The magnitude of spin reduction is more prevalent in higher lofted clubs which can lead to “fliers” or the ball traveling further than anticipated which is a problem when trying to land the ball on the green at a specific distance.
[0007] Additionally, overly aggressive groove profiles can result in excessive spin which may adversely affect ball flight and the interaction between the ball and the turf upon landing. A need exists to create a set of golf clubs which can produce desired spin levels throughout the set when played in varying course conditions.SUMMARY OF THE INVENTION
[0008] The present invention relates to golf club heads which solve the issues described above. In particular, the present invention relates to a set of golf club heads having improved groove profiles for different ranges of loft angles. The present invention includes at least a first set of golf club heads which are intended for the lower swing speed golfer and a second set of golf club heads which are intended for the higher swing speed golfer. The first set of golf club heads includes at least two different groove profiles: one groove profile for golf club heads with loft angles of 28 degrees or less, and a different groove profile for golf club heads with loft angles of greater than 28 degrees. The first set of golf club heads have groove profiles which are designed to help golfers generate more spin regardless of the lie condition while staying within certain desired spin levels when hitting out of poor conditions. The second set of golf club heads also includes at least two different groove profiles: one groove profile for golf club heads with loft angles of 31 degrees or less, and a different groove profile for golf club heads with loft angles of greater than 31 degrees. The second set of golf club heads have groove profiles which are less aggressive than the first set of golf club heads because the higher swing speed golfer can typically generate sufficient ball spin through technique. However, the second set of golf club heads has a groove profile in the higher lofted golf club heads that balances the desire for reducing spin loss out of the rough or in wet conditions with the desire to prevent imparting too much spin out of the fairway or in dry conditions.
[0009] In one aspect, the techniques described herein relate to a set of golf clubs, including: a first golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction; a second golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction, wherein the first golf club head has a loft angle less than or equal to 28 degrees, wherein the second golf club head has a loft angle greater than 28 degrees, and wherein the at least one groove of the first golf club head has a cross-sectional profile different than a cross-sectional profile of the at least one groove of the second golf club head.
[0010] In one aspect, the techniques described herein relate to a set of golf clubs, including: a first golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction; a second golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction, wherein the first golf club head has a loft angle less than or equal to 31 degrees, wherein the second golf club head has a loft angle greater than 31 degrees, and wherein the at least one groove of the first golf club head has a cross-sectional profile different than a cross-sectional profile of the at least one groove of the second golf club head.
[0011] In some aspects, the techniques described herein relate to a set of golf clubs, including: a first golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction; a second golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction, wherein the first golf club head has a loft angle less than or equal to 28 degrees, wherein the second golf club head has a loft angle greater than 28 degrees, wherein the at least one groove of the first golf club head has a cross-sectional profile different than a cross-sectional profile of the at least one groove of the second golf club head, wherein the at least one groove of the first golf club head includes: a bottom wall; a first edge between the bottom wall and the front surface of the striking face; and a second edge between the bottom wall and the front surface of the striking face opposite the first edge, wherein the at least one groove of the first golf club head is symmetrical about a longitudinal plane located equidistant from the first edge and the second edge and extending in the heel-to-toe direction perpendicular to the front surface of the striking face.
[0012] In some aspects, the techniques described herein relate to a set of golf clubs, including: a first golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction; a second golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction, a third golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction, wherein the first golf club head has a loft angle less than or equal to 23 degrees, wherein the second golf club head has a loft angle between 23 degrees and 32.5 degrees, wherein the third golf club head has a loft angle greater than 32.5 degrees, wherein the at least one groove of the first golf club head has a cross-sectional profile different than a cross-sectional profile of the at least one groove of the second golf club head, wherein the at least one groove of the first golf club head has a cross-sectional profile different than a cross-sectional profile of the at least one groove of the third golf club head, and wherein the at least one groove of the second golf club head has a cross-sectional profile different than a cross-sectional profile of the at least one groove of the third golf club head.
[0013] In some aspects, the techniques described herein relate to a set of golf clubs, including: a first golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction; and a second golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction, wherein the first golf club head has a loft angle between 43 degrees and 53 degrees, wherein the second golf club head has a loft angle between 53 degrees and 57 degrees, wherein the at least one groove of the first golf club head has a cross-sectional profile different than a cross-sectional profile of the at least one groove of the second golf club head, wherein the at least one groove of the first golf club head includes: a first sidewall; a second sidewall; a bottom wall between the first sidewall and the second sidewall; a first edge between the first sidewall and the front surface of the striking face; and a second edge between the second sidewall and the front surface of the striking face, wherein the at least one groove of the first golf club head is symmetrical about a longitudinal plane located equidistant from the first sidewall and the second sidewall and extending in the heel-to-toe direction perpendicular to the front surface of the striking face.
[0014] In some aspects, the techniques described herein relate to a set of golf clubs, including: a first golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction; and a second golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction, wherein the first golf club head has a loft angle between 43 degrees and 53 degrees, wherein the second golf club head has a loft angle between 57 degrees and 65 degrees, wherein the at least one groove of the first golf club head has a cross-sectional profile different than a cross-sectional profile of the at least one groove of the second golf club head, wherein the at least one groove of the first golf club head includes: a first sidewall; a second sidewall; a bottom wall between the first sidewall and the second sidewall; a first edge between the first sidewall and the front surface of the striking face; and a second edge between the second sidewall and the front surface of the striking face, wherein the at least one groove of the first golf club head is symmetrical about a longitudinal plane located equidistant from the first sidewall and the second sidewall and extending in the heel-to-toe direction perpendicular to the front surface of the striking face, wherein the at least one groove of the second golf club head includes: a first sidewall; a second sidewall; a bottom wall between the first sidewall and the second sidewall; a first edge between the first sidewall and the front surface of the striking face; and a second edge between the second sidewall and the front surface of the striking face, wherein the at least one groove of the second golf club head is symmetrical about a longitudinal plane located equidistant from the first sidewall and the second sidewall and extending in the heel-to-toe direction perpendicular to the front surface of the striking face.
[0015] In some aspects, the techniques described herein relate to a set of golf clubs, including: a first golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction; and a second golf club head including: a striking face including a front surface configured to strike a golf ball; a body extending rearward from the striking face and having a sole, a topline opposite the sole, a heel side, a toe side opposite the heel side, and a hosel at the heel side configured to attach to a shaft; and at least one groove in the striking face extending in a heel-to-toe direction, wherein the first golf club head has a loft angle between 53 degrees and 57 degrees, wherein the second golf club head has a loft angle between 57 degrees and 65 degrees, wherein the at least one groove of the first golf club head has a cross-sectional profile different than a cross-sectional profile of the at least one groove of the second golf club head, wherein the at least one groove of the first golf club head includes: a first sidewall; a second sidewall; a bottom wall between the first sidewall and the second sidewall; a first edge between the first sidewall and the front surface of the striking face; and a second edge between the second sidewall and the front surface of the striking face, wherein the at least one groove of the first golf club head is symmetrical about a longitudinal plane located equidistant from the first sidewall and the second sidewall and extending in the heel-to-toe direction perpendicular to the front surface of the striking face, wherein the at least one groove of the second golf club head includes: a first sidewall; a second sidewall; a bottom wall between the first sidewall and the second sidewall; a first edge between the first sidewall and the front surface of the striking face; and a second edge between the second sidewall and the front surface of the striking face, wherein the at least one groove of the second golf club head is symmetrical about a longitudinal plane located equidistant from the first sidewall and the second sidewall and extending in the heel-to-toe direction perpendicular to the front surface of the striking face.BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The present invention is described with reference to the accompanying drawings, wherein:
[0017] FIG. 1 shows a golf club head of the present invention;
[0018] FIG. 2 shows a cross-sectional view of the striking face of the golf club head of FIG. 1 along a groove;
[0019] FIG. 3 shows a preferred groove cutting setup;
[0020] FIG. 4 shows a cross-sectional view of a groove of the golf club head of FIG. 1;
[0021] FIG. 5 shows a golf club head of the present invention;
[0022] FIG. 6 shows a cross-sectional view of a groove of the golf club head of FIG. 5;
[0023] FIG. 7 shows a golf club head of the present invention;
[0024] FIG. 8 shows a cross-sectional view of a groove of the golf club head of FIG. 7;
[0025] FIG. 9 shows a golf club head of the present invention;
[0026] FIG. 10 shows a cross-sectional view of a groove of the golf club head of FIG. 9;
[0027] FIG. 11 shows a golf club head of the present invention;
[0028] FIG. 12 shows a cross-sectional view of a groove of the golf club head of FIG. 11;
[0029] FIG. 13 shows a golf club head of the present invention;
[0030] FIG. 14 shows a cross-sectional view of a groove of the golf club head of FIG. 13;
[0031] FIG. 15 shows a golf club head of the present invention;
[0032] FIG. 16 shows a cross-sectional view of a groove of the golf club head of FIG. 15;
[0033] FIG. 17 shows a golf club head of the present invention; and
[0034] FIG. 18 shows a cross-sectional view of a groove of the golf club head of FIG. 17.DETAILED DESCRIPTION OF THE INVENTION
[0035] The present invention is directed to a set of golf club heads having different groove profiles for different loft ranges. In one embodiment, a set of golf club heads includes at least a first golf club head 100 having a loft less than or equal to 28 degrees and at least a second golf club head 200 having a loft greater than 28 degrees at a normal address position. In another embodiment, a set of golf club heads includes at least a first golf club head 300 having a loft less than or equal to 31 degrees and at least a second golf club head 400 having a loft greater than 31 degrees at a normal address position.
[0036] FIGS. 1-6 show a first golf club head 100 and a second golf club head 200 of a set of golf clubs according to one embodiment of the present invention. The first golf club head 100 includes a body 110 defining a striking face 111, a sole 113, a topline 114 opposite the sole 113, a heel side 115, a toe side 116 opposite the heel side 115, and a hosel 117 at the heel side 115 configured to attach to a shaft (not shown). The striking face 111 includes a front surface 1111 configured to strike a golf ball and at least one groove 112. The striking face 111 may be unitary with the body 110, or it may be a separate component, such as an insert, coupled to the body 110. The first golf club head 100 has a loft angle less than or equal to 28 degrees. The second golf club head 200 includes a body 210 defining a striking face 211, a sole 213, a topline 214 opposite the sole 213, a heel side 215, a toe side 216 opposite the heel side 215, and a hosel 217 at the heel side 215 configured to attach to a shaft (not shown). The striking face 211 includes a front surface 2111 configured to strike a golf ball and at least one groove 212. The striking face 211 may be unitary with the body 210, or it may be a separate component, such as an insert, coupled to the body 210. The second golf club head 200 has a loft angle greater than 28 degrees.
[0037] FIG. 2 shows a cross-sectional view of the first golf club head 100 along the at least one groove 112. The at least one groove 112 may be machined into the front surface 1111 of the striking face 111. The at least one groove 112 extends in a heel-to-toe direction of the first golf club head 100. The at least one groove 112 is shallow at both the toe and heel portions of the first golf club head 100 and are deep in the central regions. The at least one groove 112 has a first distance L1 measured along the front surface 1111 of striking face 111 and a second distance L2 measured along the deepest portion of the at least one groove 112. Thus, the first distance L1 is an overall distance and the second distance L2 is a maximum depth distance. In one embodiment the second distance L2 is at least 0.2 inches shorter than the first distance L1.
[0038] The at least one groove 112 may be radiused at the toe and heel portions of the first golf club head 100 and may be machined into the striking face 111. The first golf club head 100 is retained in a mold, which preferably is formed of a material soft enough to not damage the first golf club head 100 yet resilient enough to firmly retain the first golf club head 100. A cutter 130, preferably a round cutter or a saw cutter, may be used to form the at least one groove 112. As shown, the toe and heel portions are radiused about an axis of rotation that is perpendicular to a longitudinal axis of the at least one groove 112. Furthermore, that axis of rotation is approximately parallel to the striking face 111 of the first golf club head 100. Preferred cutters have a diameter from ⅜ inch to ¾ inch. A preferred range of groove radii include from 0.125 inch to 5 inches, with 0.25 inch to 2.5 inches being more preferred. Having radiused grooves facilitates removal of dirt, grass, sand, and other materials that typically become embedded within grooves of a golf club during normal use by eliminating corners that can trap these materials. FIG. 3 shows a preferred groove cutting setup illustrating the cutter 130 with the at least one groove 112.
[0039] FIG. 4 shows a cross-sectional view of at least one groove 112 of the first golf club head 100. The at least one groove 112 includes a first sidewall 1121, a second sidewall 1122, a bottom wall 1123 between the first sidewall 1121 and the second sidewall 1122, a first edge 1125 between the first sidewall 1121 and the front surface 1111 of the striking face 111, and a second edge 1126 between the second sidewall 1122 and the front surface 1111 of the striking face 111. The at least one groove 112 is symmetrical about a longitudinal plane 125 located equidistant from the first sidewall 1121 and the second sidewall 1122 and extending perpendicular to the front surface 1111 of the striking face 111. The first edge 1125 and the second edge 1126 are each curved and have an edge radius R1. The at least one groove 112 includes a width W1 between the first edge 1125 and the second edge 1126. The bottom wall 1123 is spaced a depth D1 from the front surface 1111 of the striking face 111. The at least one groove 112 includes a wall angle θ1 defined between the first sidewall 1121 and the longitudinal plane 125.
[0040] The at least one groove 112 of the first golf club head 100 includes a wall angle θ1 between 24 degrees and 32 degrees, more preferably between 26 degrees and 30 degrees, and most preferably about 28 degrees. The wall angle is critical to ball spin generation because it affects the amount that the groove sidewalls interact with the ball and affects the angle at which the edges of the groove impact the ball. The at least one groove 112 of the first golf club head 100 has a depth D1 between 0.010 inches and 0.016 inches, more preferably between 0.013 inches and 0.015 inches, and most preferably about 0.014 inches. The depth of the groove is a critical factor in the amount of moisture and debris the ball gets exposed to during a shot while also maintaining the structural rigidity of the striking face. The at least one groove 112 of the first golf club head 100 has a width W1 between 0.025 and 0.030 inches, more preferably between 0.027 inches and 0.029 inches, and most preferably about 0.028 inches. The width of the groove affects the spin imparted to the ball by determining the amount of contact area the ball experiences with the front surface of the striking face, the amount the ball may compress between edges of the groove, and the number of grooves that ultimately interact with the ball during the shot. Additionally, the at least one groove 112 of the first golf club head 100 has a first edge 1125 and a second edge 1126 each with an edge radius R1 between 0.005 inches and 0.009 inches, more preferably between 0.006 inches and 0.008 inches, and most preferably about 0.007 inches. The edge radius, in conjunction with the wall angle, is critical to ball spin generation because it determines the amount of grab that the edges of the groove impart on the ball.
[0041] In a preferred embodiment, the set of golf clubs includes at least three golf club heads having a loft angle less than or equal to 28 degrees and having the same cross-sectional groove profile as described above for the first golf club head 100.
[0042] FIG. 6 shows a cross-sectional view of at least one groove 212 of the second golf club head 200. The at least one groove 212 of the second golf club head 200 has a different cross-sectional profile than the at least one groove 112 of the first golf club head 100. The at least one groove 212 of the second golf club head 200 includes a first sidewall 2121, a second sidewall 2122, a bottom wall 2123 between the first sidewall 2121 and the second sidewall 2122, a first edge 2125 between the first sidewall 2121 and the front surface 2111 of the striking face 211, and a second edge 2126 between the second sidewall 2122 and the front surface 2111 of the striking face 211. The at least one groove 212 is symmetrical about a longitudinal plane 225 located equidistant from the first sidewall 2121 and the second sidewall 2122 and extending perpendicular to the front surface 2111 of the striking face 211. The first edge 2125 and the second edge 2126 are each curved and have an edge radius R2. The at least one groove 212 includes a width W2 between the first edge 2125 and the second edge 2126. The bottom wall 2123 is spaced a depth D2 from the front surface 2111 of the striking face 211. The at least one groove 212 includes a wall angle θ2 defined between the first sidewall 2121 and the longitudinal plane 225.
[0043] The wall angle θ2 of the at least one groove 212 of the second golf club head 200 is less than the wall angle θ1 of the at least one groove 112 of the first golf club head 100. The depth D2 of the at least one groove 212 of the second golf club head 200 is greater than the depth D1 of the at least one groove 112 of the first golf club head 100.
[0044] In one embodiment, the at least one groove 212 of the second golf club head 200 includes a wall angle θ2 between 16 degrees and 24 degrees, more preferably between 18 degrees and 22 degrees, and most preferably about 20 degrees. The at least one groove 212 of the second golf club head 200 has a depth D2 between 0.015 inches and 0.020 inches, more preferably between 0.016 inches and 0.018 inches, and most preferably about 0.017 inches. In this embodiment, the width W2 of the at least one groove 212 of the second golf club head 200 is greater than the width W1 of the at least one groove 112 of the first golf club head 100. The at least one groove 212 of the second golf club head 200 has a width W2 between 0.028 and 0.034 inches, more preferably between 0.029 inches and 0.033 inches, and most preferably about 0.031 inches. Additionally, the at least one groove 212 of the second golf club head 200 has a first edge 2125 and a second edge 2126 each with an edge radius R2 between 0.005 inches and 0.009 inches, more preferably between 0.006 inches and 0.008 inches, and most preferably about 0.007 inches.
[0045] In another embodiment, the at least one groove 212 of the second golf club head 200 includes a wall angle θ2 between 10 degrees and 18 degrees, more preferably between 12 degrees and 16 degrees, and most preferably about 14 degrees. The at least one groove 212 of the second golf club head 200 has a depth D2 between 0.016 inches and 0.020 inches, more preferably between 0.017 inches and 0.019 inches, and most preferably about 0.018 inches. In this embodiment, the width W2 of the at least one groove 212 of the second golf club head 200 is less than the width W1 of the at least one groove 112 of the first golf club head 100. The at least one groove 212 of the second golf club head 200 has a width W2 between 0.024 and 0.028 inches, more preferably between 0.025 inches and 0.027 inches, and most preferably about 0.026 inches. Additionally, the at least one groove 212 on the second golf club head 200 has a first edge 2125 and a second edge 2126 each with an edge radius R2 between 0.006 inches and 0.010 inches, more preferably between 0.007 inches and 0.009 inches, and most preferably about 0.008 inches.
[0046] In a preferred embodiment, the set of golf clubs includes at least three golf club heads having a loft angle greater than 28 degrees and having the same cross-sectional groove profile as described above for the second golf club head 200.
[0047] FIGS. 7-10 show a first golf club head 300 and a second golf club head 400 of a set of golf clubs according to another embodiment of the present invention. The first golf club head 300 includes a body 310 defining a striking face 311, a sole 313, a topline 314 opposite the sole 313, a heel side 315, a toe side 316 opposite the heel side 315, and a hosel 317 at the heel side 315 configured to attach to a shaft (not shown). The striking face 311 includes a front surface 3111 configured to strike a golf ball and at least one groove 312. The striking face 311 may be unitary with the body 310, or it may be a separate component, such as an insert, coupled to the body 310. The first golf club head 300 has a loft angle less than or equal to 31 degrees. The second golf club head 400 includes a body 410 defining a striking face 411, a sole 413, a topline 414 opposite the sole 413, a heel side 415, a toe side 416 opposite the heel side 415, and a hosel 417 at the heel side 415 configured to attach to a shaft (not shown). The striking face 411 includes a front surface 4111 configured to strike a golf ball and at least one groove 412. The striking face 411 may be unitary with the body 410, or it may be a separate component, such as an insert, coupled to the body 410. The second golf club head 400 has a loft angle greater than 31 degrees.
[0048] FIG. 8 shows a cross-sectional view of at least one groove 312 of the first golf club head 300. The at least one groove 312 includes a first sidewall 3121, a second sidewall 3122, a bottom wall 3123 between the first sidewall 3121 and the second sidewall 3122, a first edge 3125 between the first sidewall 3121 and the front surface 3111 of the striking face 311, and a second edge 3126 between the second sidewall 3122 and the front surface 3111 of the striking face 311. The at least one groove 312 is symmetrical about a longitudinal plane 325 located equidistant from the first sidewall 3121 and the second sidewall 3122 and extending perpendicular to the front surface 3111 of the striking face 311. The first edge 3125 and the second edge 3126 are each curved and have an edge radius R3. The at least one groove 312 includes a width W3 between the first edge 3125 and the second edge 3126. The bottom wall 3123 is spaced a depth D3 from the front surface 3111 of the striking face 311. The at least one groove 312 includes a wall angle θ3 defined between the first sidewall 3121 and the longitudinal plane 325.
[0049] The at least one groove 312 of the first golf club head 300 includes a wall angle θ3 between 30 degrees and 45 degrees, more preferably between 34 degrees and 41 degrees, and most preferably about 37.5 degrees. The at least one groove 312 of the first golf club head 300 has a depth D3 between 0.012 inches and 0.019 inches, more preferably between 0.014 inches and 0.018 inches, and most preferably about 0.016 inches. The at least one groove 312 of the first golf club head 300 has a width W3 between 0.028 and 0.034 inches, more preferably between 0.029 inches and 0.033 inches, and most preferably about 0.031 inches. Additionally, the at least one groove 312 of the first golf club head 300 has a first edge 3125 and a second edge 3126 each with an edge radius R3 between 0.0025 inches and 0.0075 inches, more preferably between 0.0035 inches and 0.006 inches, and most preferably about 0.0047 inches.
[0050] In a preferred embodiment, the set of golf clubs includes at least three golf club heads having a loft angle less than or equal to 31 degrees and having the same cross-sectional groove profile as described above for the first golf club head 300.
[0051] FIG. 10 shows a cross-sectional view of at least one groove 412 of the second golf club head 400. The at least one groove 412 of the second golf club head 400 has a different cross-sectional profile than the at least one groove 312 of the first golf club head 300. The at least one groove 412 of the second golf club head 400 includes a first sidewall 4121, a second sidewall 4122, a bottom wall 4123 between the first sidewall 4121 and the second sidewall 4122, a first edge 4125 between the first sidewall 4121 and the front surface 4111 of the striking face 411, and a second edge 4126 between the second sidewall 4122 and the front surface 4111 of the striking face 411. The at least one groove 412 is symmetrical about a longitudinal plane 425 located equidistant from the first sidewall 4121 and the second sidewall 4122 and extending perpendicular to the front surface 4111 of the striking face 411. The first edge 4125 and the second edge 4126 are each curved and have an edge radius R4. The at least one groove 412 includes a width W4 between the first edge 4125 and the second edge 4126. The bottom wall 4123 is spaced a depth D4 from the front surface 4111 of the striking face 411. The at least one groove 412 includes a wall angle θ4 defined between the first sidewall 4121 and the longitudinal plane 425.
[0052] The wall angle θ4 of the at least one groove 412 of the second golf club head 400 is less than the wall angle θ3 of the at least one groove 312 of the first golf club head 300. The depth D4 of the at least one groove 412 of the second golf club head 400 is greater than the depth D3 of the at least one groove 312 of the first golf club head 300.
[0053] The at least one groove 412 of the second golf club head 400 includes a wall angle θ4 between 16 degrees and 24 degrees, more preferably between 18 degrees and 22 degrees, and most preferably about 20 degrees. The at least one groove 412 of the second golf club head 400 has a depth D4 between 0.015 inches and 0.020 inches, more preferably between 0.016 inches and 0.018 inches, and most preferably about 0.017 inches. The at least one groove 412 of the second golf club head 400 has a width W4 between 0.028 and 0.034 inches, more preferably between 0.029 inches and 0.033 inches, and most preferably about 0.031 inches. Additionally, the at least one groove 412 of the second golf club head 400 has a first edge 4125 and a second edge 4126 each with an edge radius R4 between 0.005 inches and 0.01 inches, more preferably between 0.006 inches and 0.009 inches, and most preferably between 0.007 inches and 0.008 inches.
[0054] In a preferred embodiment, the set of golf clubs includes at least three golf club heads having a loft angle greater than 31 degrees and having the same cross-sectional groove profile as described above for the second golf club head 400.
[0055] FIGS. 11 and 12 show a golf club head 500 according to an embodiment of the present invention. The golf club head 500 includes a body 510 defining a striking face 511, a sole 513, a topline 514 opposite the sole 513, a heel side 515, a toe side 516 opposite the heel side 515, and a hosel 517 at the heel side 515 configured to attach to a shaft (not shown). The striking face 511 includes a front surface 5111 configured to strike a golf ball and at least one groove 512. The striking face 511 may be unitary with the body 510, or it may be a separate component, such as an insert, coupled to the body 510.
[0056] FIG. 12 shows a cross-sectional view of at least one groove 512 of the golf club head 500. The at least one groove 512 includes a bottom wall 5123, a first edge 5125 between the bottom wall 5123 and the front surface 5111 of the striking face 511, and a second edge 5126 between the bottom wall 5123 and the front surface 5111 of the striking face 511 opposite the first edge 5125. The at least one groove 512 is symmetrical about a longitudinal plane 525 located equidistant from the first edge 5125 and the second edge 5126 and extending perpendicular to the front surface 5111 of the striking face 511. The bottom wall 5123 is curved and has a radius R5. The at least one groove 512 includes a width W5 between the first edge 5125 and the second edge 5126. The bottom wall 5123 is spaced a depth D5 from the front surface 5111 of the striking face 511. The at least one groove 512 includes a wall angle θ5 defined between the longitudinal plane 525 and a line tangential to the bottom wall 5123 at the first edge 5125.
[0057] The at least one groove 512 of the golf club head 500 includes a wall angle θ5 between 30 degrees and 45 degrees, more preferably between 34 degrees and 40 degrees, and most preferably about 37 degrees. The at least one groove 512 of the golf club head 500 has a depth D5 between 0.006 inches and 0.010 inches, more preferably between 0.007 inches and 0.009 inches, and most preferably about 0.008 inches. The at least one groove 512 of the golf club head 500 has a width W5 between 0.028 and 0.034 inches, more preferably between 0.029 inches and 0.033 inches, and most preferably about 0.031 inches. Additionally, the bottom wall 5123 of the at least one groove 512 has a radius R5 between 0.010 inches and 0.030 inches, more preferably between 0.015 inches and 0.025 inches, and most preferably about 0.02 inches.
[0058] In one embodiment of the present invention, a set of golf club heads includes at least a first golf club head having a loft less than or equal to 28 degrees and at least a second golf club head having a loft greater than 28 degrees at a normal address position. In this embodiment, the first golf club head has at least one groove 512 as described above, and the second golf club head has at least one groove 112 as described above. This configuration allows lower lofted clubs to maintain launch and spin and removes excess spin caused by deeper grooves in wet conditions, and it allows higher lofted clubs to have increased spin and avoid severe spin reductions caused by shallower grooves in wet conditions.
[0059] In another embodiment of the present invention, a set of golf club heads includes at least a first golf club head having a loft less than or equal to 23 degrees, at least a second golf club head having a loft between 23 degrees and 32.5 degrees, and at least a third golf club head having a loft greater than 32.5 degrees at a normal address position. In this embodiment, the first golf club head has at least one groove 512 as described above, the second golf club head has at least one groove 312 as described above, and the third golf club head has at least one groove 412 as described above. This configuration allows lower lofted clubs to maintain launch and spin and removes excess spin caused by deeper grooves in wet conditions, allows higher lofted clubs to have increased spin and avoid severe spin reductions caused by shallower grooves in wet conditions, and it provides an intermediary groove profile for mid-lofted clubs to provide a smooth transition of spin characteristics through the set of golf club heads.
[0060] A set of golf clubs utilizing the groove combinations of the present invention as described above better maintains proper ball spin progression throughout the set when hitting shots from a variety of turf and moisture conditions.
[0061] In another embodiment of the present invention, as shown in FIGS. 13-18, higher lofted golf club heads (above 43 degrees) are provided with particular groove profiles based on loft ranges and likely shot types for each loft range. For golf club heads having a loft range between 43 degrees and 53 degrees, the groove profile of the present invention provides high spin from the rough but keeps spin from full shots out of the fairway below maximum spin production to prevent overspinning. For golf club heads having a loft range between 53 degrees and 57 degrees, the groove profile of the present invention is deep to promote debris channeling and has a sharper edge radius for increased spin production to accommodate various shot types. For golf club heads having a loft range between 57 degrees and 65 degrees, the groove profile of the present invention is shallower and wider with a sharper edge radius to produce maximum spin.
[0062] FIGS. 13 and 14 show a golf club head 600 according to an embodiment of the present invention. The golf club head 600 includes a body 610 defining a striking face 611, a sole 613, a topline 614 opposite the sole 613, a heel side 615, a toe side 616 opposite the heel side 615, and a hosel 617 at the heel side 615 configured to attach to a shaft (not shown). The striking face 611 includes a front surface 6111 configured to strike a golf ball and at least one groove 612. The striking face 611 may be unitary with the body 610, or it may be a separate component, such as an insert, coupled to the body 610. The golf club head 600 has a loft angle between 43 degrees and 53 degrees.
[0063] FIG. 14 shows a cross-sectional view of at least one groove 612 of the golf club head 600. The at least one groove 612 of the golf club head 600 includes a first sidewall 6121, a second sidewall 6122, a bottom wall 6123 between the first sidewall 6121 and the second sidewall 6122, a first edge 6125 between the first sidewall 6121 and the front surface 6111 of the striking face 611, and a second edge 6126 between the second sidewall 6122 and the front surface 6111 of the striking face 611. The at least one groove 612 is symmetrical about a longitudinal plane 625 located equidistant from the first sidewall 6121 and the second sidewall 6122 and extending perpendicular to the front surface 6111 of the striking face 611. The first edge 6125 and the second edge 6126 are each curved and have an edge radius R6. The at least one groove 612 includes a width W6 between the first edge 6125 and the second edge 6126. The bottom wall 6123 is spaced a depth D6 from the front surface 6111 of the striking face 611. The at least one groove 612 includes a wall angle θ6 defined between the first sidewall 6121 and the longitudinal plane 625.
[0064] The at least one groove 612 of the golf club head 600 includes a wall angle θ6 between 10 degrees and 18 degrees, more preferably between 12 degrees and 16 degrees, and most preferably about 14 degrees. The at least one groove 612 of the golf club head 600 has a depth D6 between 0.015 inches and 0.021 inches, more preferably between 0.016 inches and 0.020 inches, and most preferably about 0.018 inches. The at least one groove 612 of the golf club head 600 has a width W6 between 0.023 and 0.029 inches, more preferably between 0.024 inches and 0.028 inches, and most preferably about 0.026 inches. Additionally, the at least one groove 612 of the golf club head 600 has a first edge 6125 and a second edge 6126 each with an edge radius R6 between 0.005 inches and 0.011 inches, more preferably between 0.006 inches and 0.010 inches, and most preferably about 0.008 inches.
[0065] FIGS. 15 and 16 show a golf club head 700 according to an embodiment of the present invention. The golf club head 700 includes a body 710 defining a striking face 711, a sole 713, a topline 714 opposite the sole 713, a heel side 715, a toe side 716 opposite the heel side 715, and a hosel 717 at the heel side 715 configured to attach to a shaft (not shown). The striking face 711 includes a front surface 7111 configured to strike a golf ball and at least one groove 712. The striking face 711 may be unitary with the body 710, or it may be a separate component, such as an insert, coupled to the body 710. The golf club head 700 has a loft angle between 53 degrees and 57 degrees.
[0066] FIG. 16 shows a cross-sectional view of at least one groove 712 of the golf club head 700. The at least one groove 712 of the golf club head 700 includes a first sidewall 7121, a second sidewall 7122, a bottom wall 7123 between the first sidewall 7121 and the second sidewall 7122, a first edge 7125 between the first sidewall 7121 and the front surface 7111 of the striking face 711, and a second edge 7126 between the second sidewall 7122 and the front surface 7111 of the striking face 711. The at least one groove 712 is symmetrical about a longitudinal plane 725 located equidistant from the first sidewall 7121 and the second sidewall 7122 and extending perpendicular to the front surface 7111 of the striking face 711. The first edge 7125 and the second edge 7126 are each curved and have an edge radius R7. The at least one groove 712 includes a width W7 between the first edge 7125 and the second edge 7126. The bottom wall 7123 is spaced a depth D7 from the front surface 7111 of the striking face 711. The at least one groove 712 includes a wall angle θ7 defined between the first sidewall 7121 and the longitudinal plane 725.
[0067] The at least one groove 712 of the golf club head 700 includes a wall angle θ7 between 10 degrees and 18 degrees, more preferably between 12 degrees and 16 degrees, and most preferably about 14 degrees. The at least one groove 712 of the golf club head 700 has a depth D7 between 0.015 inches and 0.021 inches, more preferably between 0.016 inches and 0.020 inches, and most preferably about 0.018 inches. The at least one groove 712 of the golf club head 700 has a width W7 between 0.023 and 0.029 inches, more preferably between 0.024 inches and 0.028 inches, and most preferably about 0.026 inches. Additionally, the at least one groove 712 of the golf club head 700 has a first edge 7125 and a second edge 7126 each with an edge radius R7 between 0.004 inches and 0.010 inches, more preferably between 0.005 inches and 0.009 inches, and most preferably about 0.007 inches.
[0068] FIGS. 17 and 18 show a golf club head 800 according to an embodiment of the present invention. The golf club head 800 includes a body 810 defining a striking face 811, a sole 813, a topline 814 opposite the sole 813, a heel side 815, a toe side 816 opposite the heel side 815, and a hosel 817 at the heel side 815 configured to attach to a shaft (not shown). The striking face 811 includes a front surface 8111 configured to strike a golf ball and at least one groove 812. The striking face 811 may be unitary with the body 810, or it may be a separate component, such as an insert, coupled to the body 810. The golf club head 800 has a loft angle between 57 degrees and 65 degrees.
[0069] FIG. 18 shows a cross-sectional view of at least one groove 812 of the golf club head 800. The at least one groove 812 of the golf club head 800 includes a first sidewall 8121, a second sidewall 8122, a bottom wall 8123 between the first sidewall 8121 and the second sidewall 8122, a first edge 8125 between the first sidewall 8121 and the front surface 8111 of the striking face 811, and a second edge 8126 between the second sidewall 8122 and the front surface 8111 of the striking face 811. The at least one groove 812 is symmetrical about a longitudinal plane 825 located equidistant from the first sidewall 8121 and the second sidewall 8122 and extending perpendicular to the front surface 8111 of the striking face 811. The first edge 8125 and the second edge 8126 are each curved and have an edge radius R8. The at least one groove 812 includes a width W8 between the first edge 8125 and the second edge 8126. The bottom wall 8123 is spaced a depth D8 from the front surface 8111 of the striking face 811. The at least one groove 812 includes a wall angle θ8 defined between the first sidewall 8121 and the longitudinal plane 825.
[0070] The at least one groove 812 of the golf club head 800 includes a wall angle θ8 between 10 degrees and 18 degrees, more preferably between 12 degrees and 16 degrees, and most preferably about 14 degrees. The at least one groove 812 of the golf club head 800 has a depth D8 between 0.013 inches and 0.019 inches, more preferably between 0.014 inches and 0.018 inches, and most preferably about 0.016 inches. The at least one groove 812 of the golf club head 800 has a width W8 between 0.025 and 0.031 inches, more preferably between 0.026 inches and 0.030 inches, and most preferably about 0.028 inches. Additionally, the at least one groove 812 of the golf club head 800 has a first edge 8125 and a second edge 8126 each with an edge radius R8 between 0.004 inches and 0.010 inches, more preferably between 0.005 inches and 0.009 inches, and most preferably about 0.007 inches.
[0071] In another aspect of the present invention, a set of golf club heads includes at least two golf club heads selected from golf club head 600, golf club head 700, and golf club head 800 described above.
[0072] In one embodiment of the present invention, the set of golf club heads includes a first golf club head 600 having a loft between 43 degrees and 53 degrees and a second golf club head 700 having a loft between 53 degrees and 57 degrees at a normal address position. In this embodiment, the first golf club head 600 has at least one groove 612 as described above, and the second golf club head 700 has at least one groove 712 as described above. In this embodiment, the at least one groove 612 of the first golf club head 600 has an edge radius R6 greater than an edge radius R7 of the at least one groove 712 of the second golf club head 700. This configuration allows the first golf club head 600 to produce sufficient spin for stopping the ball without overspinning, and it allows the second golf club head 700 to have increased spin.
[0073] In another embodiment of the present invention, the set of golf club heads includes a first golf club head 600 having a loft between 43 degrees and 53 degrees and a second golf club head 800 having a loft between 57 degrees and 65 degrees at a normal address position. In this embodiment, the first golf club head 600 has at least one groove 612 as described above, and the second golf club head 800 has at least one groove 812 as described above. In this embodiment, the at least one groove 612 of the first golf club head 600 has an edge radius R6 greater than an edge radius R8 of the at least one groove 812 of the second golf club head 800; the at least one groove 612 of the first golf club head 600 has a depth D6 greater than a depth D8 of the at least one groove 812 of the second golf club head 800; and the at least one groove 812 of the second golf club head 800 has a width W8 greater than a width W6 of the at least one groove 612 of the first golf club head 600. This configuration allows the first golf club head 600 to produce sufficient spin for stopping the ball without overspinning, and it allows the second golf club head 800 to have maximum spin for the highest lofts.
[0074] In another embodiment of the present invention, the set of golf club heads includes a first golf club head 700 having a loft between 53 degrees and 57 degrees and a second golf club head 800 having a loft between 57 degrees and 65 degrees at a normal address position. In this embodiment, the first golf club head 700 has at least one groove 712 as described above, and the second golf club head 800 has at least one groove 812 as described above. In this embodiment, the at least one groove 712 of the first golf club head 700 has a depth D7 greater than a depth D8 of the at least one groove 812 of the second golf club head 800; and the at least one groove 812 of the second golf club head 800 has a width W8 greater than a width W7 of the at least one groove 712 of the first golf club head 700. This configuration allows the first golf club head 700 to have maximum spin and maximum debris channeling, and it allows the second golf club head 800 to have maximum spin for the highest lofts.
[0075] In another embodiment of the present invention, the set of golf club heads includes a first golf club head 600 having a loft between 43 degrees and 53 degrees, a second golf club head 700 having a loft between 53 degrees and 57 degrees, and a third golf club head 800 having a loft between 57 degrees and 65 degrees at a normal address position. In this embodiment, the first golf club head 600 has at least one groove 612 as described above, the second golf club head 700 has at least one groove 712 as described above, and the third golf club head 800 has at least one groove 812 as described above. In this embodiment, the at least one groove 612 of the first golf club head 600 has an edge radius R6 greater than an edge radius R7 of the at least one groove 712 of the second golf club head 700 and greater than an edge radius R8 of the at least one groove 812 of the third golf club head 800. The at least one groove 612 of the first golf club head 600 has a depth D6 greater than a depth D8 of the at least one groove 812 of the third golf club head 800, and the at least one groove 712 of the second golf club head 700 has a depth D7 greater than a depth D8 of the at least one groove 812 of the third golf club head 800. The at least one groove 812 of the third golf club head 800 has a width W8 greater than a width W6 of the at least one groove 612 of the first golf club head 600, and the at least one groove 812 of the third golf club head 800 has a width W8 greater than a width W7 of the at least one groove 712 of the second golf club head 700. This configuration allows the first golf club head 600 to produce sufficient spin for stopping the ball without overspinning, the second golf club head 700 to have maximum spin and maximum debris channeling, and the third golf club head 800 to have maximum spin for the highest lofts.
[0076] A set of golf clubs utilizing the groove combinations of the present invention as described above better maintains proper ball spin progression throughout the set when hitting a variety of different shot types.
[0077] Other than in the operating examples, or unless otherwise expressly specified, all of the numerical ranges, amounts, values and percentages such as those for amounts of materials, moments of inertias, center of gravity locations, loft and wall angles, and others in the following portion of the specification may be read as if prefaced by the word “about” even though the term “about” may not expressly appear with the value, amount, or range. Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
[0078] Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements. Furthermore, when numerical ranges of varying scope are set forth herein, it is contemplated that any combination of these values inclusive of the recited values may be used.
[0079] While the preferred embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not of limitation. It will be apparent to persons skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the invention. Thus the present invention should not be limited by the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
Examples
Embodiment Construction
[0035]The present invention is directed to a set of golf club heads having different groove profiles for different loft ranges. In one embodiment, a set of golf club heads includes at least a first golf club head 100 having a loft less than or equal to 28 degrees and at least a second golf club head 200 having a loft greater than 28 degrees at a normal address position. In another embodiment, a set of golf club heads includes at least a first golf club head 300 having a loft less than or equal to 31 degrees and at least a second golf club head 400 having a loft greater than 31 degrees at a normal address position.
[0036]FIGS. 1-6 show a first golf club head 100 and a second golf club head 200 of a set of golf clubs according to one embodiment of the present invention. The first golf club head 100 includes a body 110 defining a striking face 111, a sole 113, a topline 114 opposite the sole 113, a heel side 115, a toe side 116 opposite the heel side 115, and a hosel 117 at the heel sid...
Claims
1. A set of golf clubs, comprising:a first golf club head comprising:a striking face including a front surface configured to strike a golf ball;a body extending rearward from said striking face and having a sole, a topline opposite said sole, a heel side, a toe side opposite said heel side, and a hosel at said heel side configured to attach to a shaft; andat least one groove in said striking face extending in a heel-to-toe direction; anda second golf club head comprising:a striking face including a front surface configured to strike a golf ball;a body extending rearward from said striking face and having a sole, a topline opposite said sole, a heel side, a toe side opposite said heel side, and a hosel at said heel side configured to attach to a shaft; andat least one groove in said striking face extending in a heel-to-toe direction,wherein said first golf club head has a loft angle between 43 degrees and 53 degrees,wherein said second golf club head has a loft angle between 53 degrees and 57 degrees,wherein said at least one groove of said first golf club head has a cross-sectional profile different than a cross-sectional profile of said at least one groove of said second golf club head,wherein said at least one groove of said first golf club head comprises:a first sidewall;a second sidewall;a bottom wall between said first sidewall and said second sidewall;a first edge between said first sidewall and said front surface of said striking face; anda second edge between said second sidewall and said front surface of said striking face,wherein said at least one groove of said first golf club head is symmetrical about a longitudinal plane located equidistant from said first sidewall and said second sidewall and extending in said heel-to-toe direction perpendicular to said front surface of said striking face.
2. The set of golf clubs of claim 1, wherein said at least one groove of said second golf club head comprises:a first sidewall;a second sidewall;a bottom wall between said first sidewall and said second sidewall;a first edge between said first sidewall and said front surface of said striking face; anda second edge between said second sidewall and said front surface of said striking face,wherein said at least one groove of said second golf club head is symmetrical about a longitudinal plane located equidistant from said first sidewall and said second sidewall and extending in said heel-to-toe direction perpendicular to said front surface of said striking face.
3. The set of golf clubs of claim 2, wherein said first edge and said second edge of said at least one groove of said first golf club head are each curved and have an edge radius,wherein said first edge and said second edge of said at least one groove of said second golf club head are each curved and have an edge radius, andwherein said edge radius of said first edge and said second edge of said at least one groove of said first golf club head is greater than said edge radius of said first edge and said second edge of said at least one groove of said second golf club head.
4. The set of golf clubs of claim 3, wherein said edge radius of said first edge and said second edge of said at least one groove of said first golf club head is between 0.005 inches and 0.011 inches, andwherein said edge radius of said first edge and said second edge of said at least one groove of said second golf club head is between 0.004 inches and 0.010 inches.
5. The set of golf clubs of claim 2, further comprising:a third golf club head comprising:a striking face including a front surface configured to strike a golf ball;a body extending rearward from said striking face and having a sole, a topline opposite said sole, a heel side, a toe side opposite said heel side, and a hosel at said heel side configured to attach to a shaft; andat least one groove in said striking face extending in a heel-to-toe direction,wherein said third golf club head has a loft angle between 57 degrees and 65 degrees,wherein said at least one groove of said third golf club head has a cross-sectional profile different than a cross-sectional profile of said at least one groove of said first golf club head,wherein said at least one groove of said third golf club head has a cross-sectional profile different than a cross-sectional profile of said at least one groove of said second golf club head,wherein said at least one groove of said third golf club head comprises:a first sidewall;a second sidewall;a bottom wall between said first sidewall and said second sidewall;a first edge between said first sidewall and said front surface of said striking face; anda second edge between said second sidewall and said front surface of said striking face,wherein said at least one groove of said third golf club head is symmetrical about a longitudinal plane located equidistant from said first sidewall and said second sidewall and extending in said heel-to-toe direction perpendicular to said front surface of said striking face.
6. The set of golf clubs of claim 5, wherein said first edge and said second edge of said at least one groove of said first golf club head are each curved and have an edge radius,wherein said first edge and said second edge of said at least one groove of said second golf club head are each curved and have an edge radius,wherein said first edge and said second edge of said at least one groove of said third golf club head are each curved and have an edge radius,wherein said edge radius of said first edge and said second edge of said at least one groove of said first golf club head is greater than said edge radius of said first edge and said second edge of said at least one groove of said second golf club head, andwherein said edge radius of said first edge and said second edge of said at least one groove of said first golf club head is greater than said edge radius of said first edge and said second edge of said at least one groove of said third golf club head.
7. The set of golf clubs of claim 5, wherein said at least one groove of said first golf club head includes a depth defined between said front surface of said striking face and said bottom wall,wherein said at least one groove of said second golf club head includes a depth defined between said front surface of said striking face and said bottom wall,wherein said at least one groove of said third golf club head includes a depth defined between said front surface of said striking face and said bottom wall,wherein said depth of said at least one groove of said first golf club head is greater than said depth of said at least one groove of said third golf club head, andwherein said depth of said at least one groove of said second golf club head is greater than said depth of said at least one groove of said third golf club head.
8. The set of golf clubs of claim 5, wherein said at least one groove of said first golf club head includes a width defined between said first edge and said second edge,wherein said at least one groove of said second golf club head includes a width defined between said first edge and said second edge,wherein said at least one groove of said third golf club head includes a width defined between said first edge and said second edge,wherein said width of said at least one groove of said third golf club head is greater than said width of said at least one groove of said first golf club head, andwherein said width of said at least one groove of said third golf club head is greater than said width of said at least one groove of said second golf club head.
9. A set of golf clubs, comprising:a first golf club head comprising:a striking face including a front surface configured to strike a golf ball;a body extending rearward from said striking face and having a sole, a topline opposite said sole, a heel side, a toe side opposite said heel side, and a hosel at said heel side configured to attach to a shaft; andat least one groove in said striking face extending in a heel-to-toe direction; anda second golf club head comprising:a striking face including a front surface configured to strike a golf ball;a body extending rearward from said striking face and having a sole, a topline opposite said sole, a heel side, a toe side opposite said heel side, and a hosel at said heel side configured to attach to a shaft; andat least one groove in said striking face extending in a heel-to-toe direction,wherein said first golf club head has a loft angle between 43 degrees and 53 degrees,wherein said second golf club head has a loft angle between 57 degrees and 65 degrees,wherein said at least one groove of said first golf club head has a cross-sectional profile different than a cross-sectional profile of said at least one groove of said second golf club head,wherein said at least one groove of said first golf club head comprises:a first sidewall;a second sidewall;a bottom wall between said first sidewall and said second sidewall;a first edge between said first sidewall and said front surface of said striking face; anda second edge between said second sidewall and said front surface of said striking face,wherein said at least one groove of said first golf club head is symmetrical about a longitudinal plane located equidistant from said first sidewall and said second sidewall and extending in said heel-to-toe direction perpendicular to said front surface of said striking face,wherein said at least one groove of said second golf club head comprises:a first sidewall;a second sidewall;a bottom wall between said first sidewall and said second sidewall;a first edge between said first sidewall and said front surface of said striking face; anda second edge between said second sidewall and said front surface of said striking face,wherein said at least one groove of said second golf club head is symmetrical about a longitudinal plane located equidistant from said first sidewall and said second sidewall and extending in said heel-to-toe direction perpendicular to said front surface of said striking face.
10. The set of golf clubs of claim 9, wherein said first edge and said second edge of said at least one groove of said first golf club head are each curved and have an edge radius,wherein said first edge and said second edge of said at least one groove of said second golf club head are each curved and have an edge radius, andwherein said edge radius of said first edge and said second edge of said at least one groove of said first golf club head is greater than said edge radius of said first edge and said second edge of said at least one groove of said second golf club head.
11. The set of golf clubs of claim 10, wherein said edge radius of said first edge and said second edge of said at least one groove of said first golf club head is between 0.005 inches and 0.011 inches, andwherein said edge radius of said first edge and said second edge of said at least one groove of said second golf club head is between 0.004 inches and 0.010 inches.
12. The set of golf clubs of claim 9, wherein said at least one groove of said first golf club head includes a depth defined between said front surface of said striking face and said bottom wall,wherein said at least one groove of said second golf club head includes a depth defined between said front surface of said striking face and said bottom wall, andwherein said depth of said at least one groove of said first golf club head is greater than said depth of said at least one groove of said second golf club head.
13. The set of golf clubs of claim 12, wherein said depth of said at least one groove of said first golf club head is between 0.015 inches and 0.021 inches, andwherein said depth of said at least one groove of said second golf club head is between 0.013 inches and 0.019 inches.
14. The set of golf clubs of claim 9, wherein said at least one groove of said first golf club head includes a width defined between said first edge and said second edge,wherein said at least one groove of said second golf club head includes a width defined between said first edge and said second edge, andwherein said width of said at least one groove of said second golf club head is greater than said width of said at least one groove of said first golf club head.
15. The set of golf clubs of claim 14, wherein said width of said at least one groove of said first golf club head is between 0.023 inches and 0.029 inches, andwherein said width of said at least one groove of said second golf club head is between 0.025 inches and 0.031 inches.
16. A set of golf clubs, comprising:a first golf club head comprising:a striking face including a front surface configured to strike a golf ball;a body extending rearward from said striking face and having a sole, a topline opposite said sole, a heel side, a toe side opposite said heel side, and a hosel at said heel side configured to attach to a shaft; andat least one groove in said striking face extending in a heel-to-toe direction; anda second golf club head comprising:a striking face including a front surface configured to strike a golf ball;a body extending rearward from said striking face and having a sole, a topline opposite said sole, a heel side, a toe side opposite said heel side, and a hosel at said heel side configured to attach to a shaft; andat least one groove in said striking face extending in a heel-to-toe direction,wherein said first golf club head has a loft angle between 53 degrees and 57 degrees,wherein said second golf club head has a loft angle between 57 degrees and 65 degrees,wherein said at least one groove of said first golf club head has a cross-sectional profile different than a cross-sectional profile of said at least one groove of said second golf club head,wherein said at least one groove of said first golf club head comprises:a first sidewall;a second sidewall;a bottom wall between said first sidewall and said second sidewall;a first edge between said first sidewall and said front surface of said striking face; anda second edge between said second sidewall and said front surface of said striking face,wherein said at least one groove of said first golf club head is symmetrical about a longitudinal plane located equidistant from said first sidewall and said second sidewall and extending in said heel-to-toe direction perpendicular to said front surface of said striking face,wherein said at least one groove of said second golf club head comprises:a first sidewall;a second sidewall;a bottom wall between said first sidewall and said second sidewall;a first edge between said first sidewall and said front surface of said striking face; anda second edge between said second sidewall and said front surface of said striking face,wherein said at least one groove of said second golf club head is symmetrical about a longitudinal plane located equidistant from said first sidewall and said second sidewall and extending in said heel-to-toe direction perpendicular to said front surface of said striking face.
17. The set of golf clubs of claim 16, wherein said at least one groove of said first golf club head includes a depth defined between said front surface of said striking face and said bottom wall,wherein said at least one groove of said second golf club head includes a depth defined between said front surface of said striking face and said bottom wall, andwherein said depth of said at least one groove of said first golf club head is greater than said depth of said at least one groove of said second golf club head.
18. The set of golf clubs of claim 17, wherein said depth of said at least one groove of said first golf club head is between 0.015 inches and 0.021 inches, andwherein said depth of said at least one groove of said second golf club head is between 0.013 inches and 0.019 inches.
19. The set of golf clubs of claim 16, wherein said at least one groove of said first golf club head includes a width defined between said first edge and said second edge,wherein said at least one groove of said second golf club head includes a width defined between said first edge and said second edge, andwherein said width of said at least one groove of said second golf club head is greater than said width of said at least one groove of said first golf club head.
20. The set of golf clubs of claim 19, wherein said width of said at least one groove of said first golf club head is between 0.023 inches and 0.029 inches, andwherein said width of said at least one groove of said second golf club head is between 0.025 inches and 0.031 inches.