The invention relates generally to golf club heads and other ball striking devices that include impact influencing body features. Certain aspects of this invention relate to golf club heads and other ball striking devices that have one or more of a compression channel extending across at least a portion of the sole, a void within the sole, and internal and/or external ribs.
Golf clubs and many other ball striking devices may have various face and body features, as well as other characteristics that can influence the use and performance of the device. For example, users may wish to have improved impact properties, such as increased coefficient of restitution (COR) in the face, increased size of the area of greatest response or COR (also known as the “hot zone”) of the face, and/or improved efficiency of the golf ball on impact. A significant portion of the energy loss during an impact of a golf club head with a golf ball is a result of energy loss in the deformation of the golf ball, and reducing deformation of the golf ball during impact may increase energy transfer and velocity of the golf ball after impact. The present devices and methods are provided to address at least some of these problems and other problems, and to provide advantages and aspects not provided by prior ball striking devices. A full discussion of the features and advantages of the present invention is deferred to the following detailed description, which proceeds with reference to the accompanying drawings.
The following presents a general summary of aspects of the invention in order to provide a basic understanding of the invention. This summary is not an extensive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. The following summary merely presents some concepts of the invention in a general form as a prelude to the more detailed description provided below.
Aspects of this disclosure relate to a golf club head comprising: a face having a striking surface configured for striking a ball, an upper edge, a lower edge, a heel edge, and a toe edge; a body connected to the face and extending rearwardly from the face, the body having a crown, a sole, a heel, and a toe; where the body and the face are integrally joined at a joint to form an interior cavity and the upper edge, the lower edge, the heel edge, and the toe edge of the face are defined by the joint. The face may have a first region having a first thickness, a second region having a second thickness, a third region having a third thickness, a fourth region having a fourth thickness, a fifth region having a fifth thickness. The first region may be positioned in a center region of the face, the second region may be positioned on the toe side, the third region may be positioned on the heel side, a fourth region may be positioned between the first region and the upper edge of the face, and the fifth region may be positioned between the first region and a lower edge of the face.
Further aspects of this disclosure relate to the first region having a center point that may be located within a range between 1 mm and 4 mm above a face center location in a crown-to-sole direction. The first thickness may have a constant thickness that is greater than the second thickness, the third thickness, the fourth thickness, and the fifth thickness. The second thickness and the third thickness may have the same thickness and the second thickness and the third thickness may be less than the first thickness, the fourth thickness, and the fifth thickness. The fourth thickness may have a varying thickness and a slope from the first thickness to the upper edge of the face and the fifth thickness may have a varying thickness and a slope from the first thickness to the lower edge. Also, the slope of the fourth thickness may be greater than the slope of the fifth thickness. Additional aspects relate to the face having a toe and heel thickness in a range of 2.3 mm to 2.6 mm.
According to another aspect, the face may have multiple thickness regions having a center region positioned near a center of the face, a heel region positioned on the heel, a toe region positioned on the toe, an upper region positioned between the center region and the upper edge of the face, and a lower region positioned between the center region and the lower edge of the face. The upper region may have a ramped thickness that decreases as a function of the distance away from the center region to the upper edge, and the lower region may have a ramped thickness that decreases as a function of the distance away from the center region to the upper edge. The center region may have a rectangular shape with rounded corners, where the rounded corners have a radius of within a range of 5 mm to 10 mm. Additionally, the center region may have a width in a range of 34 mm to 42 mm and a height within a range of 15 mm to 19 mm. A ratio of a thickness of the center region to a thickness of the toe region may be in a range of 1.27:1 to 1.55:1.
Another aspect of this disclosure relates to the center region of the face having a surface area within a range of 480 mm2 to 620 mm2. The center region has a surface area that is within a range of 18 percent and 23 percent of a total surface area of the face defined within a boundary of the upper edge, the toe edge, the lower edge and the heel edge. The flange thickness may have a constant thickness within a range of 2.6 mm to 2.8 mm and may be greater than the thickness of the toe and heel regions.
To allow for a more full understanding of the present invention, it will now be described by way of example, with reference to the accompanying drawings in which:
In the following description of various example structures according to the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example devices, systems, and environments in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, example devices, systems, and environments may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Also, while the terms “top,” “bottom,” “front,” “back,” “side,” “rear,” and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein as a matter of convenience, e.g., based on the example orientations shown in the figures or the orientation during typical use. Additionally, the term “plurality,” as used herein, indicates any number greater than one, either disjunctively or conjunctively, as necessary, up to an infinite number. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this invention. Also, the reader is advised that the attached drawings are not necessarily drawn to scale.
The following terms are used in this specification, and unless otherwise noted or clear from the context, these terms have the meanings provided below.
“Ball striking device” means any device constructed and designed to strike a ball or other similar objects (such as a hockey puck). In addition to generically encompassing “ball striking heads,” which are described in more detail below, examples of “ball striking devices” include, but are not limited to: golf clubs, putters, croquet mallets, polo mallets, baseball or softball bats, cricket bats, tennis rackets, badminton rackets, field hockey sticks, ice hockey sticks, and the like.
“Ball striking head” (or “head”) means the portion of a “ball striking device” that includes and is located immediately adjacent (optionally surrounding) the portion of the ball striking device designed to contact the ball (or other object) in use. In some examples, such as many golf clubs and putters, the ball striking head may be a separate and independent entity from any shaft member, and it may be attached to the shaft in some manner.
The terms “shaft” or “handle” include the portion of a ball striking device (if any) that the user holds during a swing of a ball striking device.
“Integral joining technique” means a technique for joining two pieces so that the two pieces effectively become a single, integral piece, including, but not limited to, irreversible joining techniques, such as adhesively joining, cementing, welding, brazing, soldering, or the like, where separation of the joined pieces cannot be accomplished without structural damage thereto. Pieces joined with such a technique are described as “integrally joined.”
“Generally parallel” means that a first line, segment, plane, edge, surface, etc. is approximately (in this instance, within 5%) equidistant from with another line, plane, edge, surface, etc., over at least 50% of the length of the first line, segment, plane, edge, surface, etc.
In general, aspects of this invention relate to ball striking devices, such as golf club heads, golf clubs, and the like. Such ball striking devices, according to at least some examples of the invention, may include a ball striking head with a ball striking surface. In the case of a golf club, the ball striking surface is a substantially flat surface on one face of the ball striking head. Some more specific aspects of this invention relate to wood-type golf clubs and golf club heads, including drivers, fairway woods, hybrid clubs, and the like, although aspects of this invention also may be practiced in connection with iron-type clubs, putters, and other club types as well.
According to various aspects and embodiments, the ball striking device may be formed of one or more of a variety of materials, such as metals (including metal alloys), ceramics, polymers, composites (including fiber-reinforced composites), and wood, and may be formed in one of a variety of configurations, without departing from the scope of the invention. In one illustrative embodiment, some or all components of the head, including the face and at least a portion of the body of the head, are made of metal (the term “metal,” as used herein, includes within its scope metal alloys, metal matrix composites, and other metallic materials). It is understood that the head may contain components made of several different materials, including carbon-fiber composites, polymer materials, and other components. Additionally, the components may be formed by various forming methods. For example, metal components, such as components made from titanium, aluminum, titanium alloys, aluminum alloys, steels (including stainless steels), and the like, may be formed by forging, molding, casting, stamping, machining, and/or other known techniques. In another example, composite components, such as carbon fiber-polymer composites, can be manufactured by a variety of composite processing techniques, such as prepreg processing, powder-based techniques, mold infiltration, and/or other known techniques. In a further example, polymer components, such as high strength polymers, can be manufactured by polymer processing techniques, such as various molding and casting techniques and/or other known techniques.
The various figures in this application illustrate examples of ball striking devices according to this invention. When the same reference number appears in more than one drawing, that reference number is used consistently in this specification and the drawings refer to the same or similar parts throughout.
At least some examples of ball striking devices according to this invention relate to golf club head structures, including heads for wood-type golf clubs, such as drivers, fairway woods and hybrid clubs, as well as other types of wood-type clubs. Such devices may include a one-piece construction or a multiple-piece construction. Example structures of ball striking devices according to this invention will be described in detail below in conjunction with
The golf club 100 shown in
In the club 100 shown in
The body 108 of the head 102 can have various different shapes, including a rounded shape, as in the head 102 shown in
In the illustrative embodiment illustrated in
The face 112 is located at the front 124 of the head 102 and has a ball striking surface (or striking surface) 110 located thereon and an inner surface 111 opposite the ball striking surface 110, as illustrated in
It is understood that the face 112, the body 108, and/or the hosel 109 can be formed as a single piece or as separate pieces that are joined together. The face 112 may be formed as a face member with the body 108 being partially or wholly formed by one or more separate pieces connected to the face member. Such a face member may be in the form of, e.g., a face plate member or face insert, or a partial or complete cup-face member having a wall or walls extending rearward from the edges of the face 112. These pieces may be connected by an integral joining technique, such as welding, cementing, or adhesively joining. Other known techniques for joining these parts can be used as well, including many mechanical joining techniques, including releasable mechanical engagement techniques. As one example, a body member formed of a single, integral, cast piece may be connected to a face member to define the entire club head. The head 102 in
The golf club 100 may include a shaft 104 connected to or otherwise engaged with the ball striking head 102 as shown in
The shaft 104 may be constructed from one or more of a variety of materials, including metals, ceramics, polymers, composites, or wood. In some illustrative embodiments, the shaft 104, or at least portions thereof, may be constructed of a metal, such as stainless steel or titanium, or a composite, such as a carbon/graphite fiber-polymer composite. However, it is contemplated that the shaft 104 may be constructed of different materials without departing from the scope of the invention, including conventional materials that are known and used in the art. A grip element 105 may be positioned on the shaft 104 to provide a golfer with a slip resistant surface with which to grasp the golf club shaft 104, as seen in
The various embodiments of golf clubs 100 and/or golf club heads 102 described herein may include components that have sizes, shapes, locations, orientations, etc., that are described with reference to one or more properties and/or reference points. Several of such properties and reference points are described in the following paragraphs, with reference to
As illustrated in
One or more origin points 8 (e.g., 8A, 8B) may be defined in relation to certain elements of the golf club 100 or golf club head 102. Various other points, such as a center of gravity, a sole contact, and a face center, may be described and/or measured in relation to one or more of such origin points 8.
As illustrated in
Additionally as illustrated in
As illustrated in
As golf clubs have evolved in recent years, many have incorporated head/shaft interconnection structures connecting the shaft 104 and club head 102. These interconnection structures are used to allow a golfer to easily change shafts for different flex, weight, length or other desired properties. Many of these interconnection structures have features whereby the shaft 104 is connected to the interconnection structure at a different angle than the hosel axis 4 of the golf club head, including the interconnection structures discussed elsewhere herein. This feature allows these interconnection structures to be rotated in various configurations to potentially adjust some of the relationships between the club head 102 and the shaft 104 either individually or in combination, such as the lie angle, the loft angle, or the face angle. As such, if a golf club 100 includes an interconnection structure, it shall be attached to the golf club head when addressing any measurements on the golf club head 102. For example, when positioning the golf club head 102 in the reference position, the interconnection structures should be attached to the structure. Since this structure can influence the lie angle, face angle, and loft angle of the golf club head, the interconnection member shall be set to its most neutral position. Additionally, these interconnection members have a weight that can affect the golf club heads mass properties, e.g. center of gravity (CG) and moment of inertia (MOI) properties. Thus, any mass property measurements on the golf club head should be measured with the interconnection member attached to the golf club head.
The moment of inertia is a property of the club head 102, the importance of which is known to those skilled in the art. There are three moment of inertia properties referenced herein. The moment of inertia with respect to an axis parallel to the X-axis 14 of the ground plane coordinate system, extending through the center of gravity 26 of the club head 102, is referenced as the MOI x-x, as illustrated in
The ball striking face height (FH) 56 is a measurement taken along a plane normal to the ground plane and defined by the dimension CFX 42 through the face center 40, of the distance between the ground plane 6 and a point represented by a midpoint of a radius between the crown 116 and the face 112. An example of the measurement of the face height 56 of a head 102 is illustrated in
The head length 58 and head breadth 60 measurements can be determined by using the USGA “Procedure for Measuring the Club Head Size of Wood Clubs,” USGA-TPX 3003, Revision 1.0.0, dated Nov. 21, 2003. Examples of the measurement of the head length 58 and head breadth 60 of a head 102 are illustrated in
Geometry and Mass Properties of Club Heads
In the golf club 100 shown in
The head 102 as shown in
The head 102 as shown in
The head 102 as shown in
Channel Structure of Club Head
In general, the ball striking heads 102 according to the present invention include features on the body 108 that influence the impact of a ball on the face 112, such as one or more compression channels 140 positioned on the body 108 of the head 102 that allow at least a portion of the body 108 to flex, produce a reactive force, and/or change the behavior or motion of the face 112, during impact of a ball on the face 112. In the golf club 100 shown in
The golf club head 102 shown in
As illustrated in
An alternate embodiment of the center portion 130 of channel 140 is shown in
Similar to the embodiment of
The head 102 in the embodiment illustrated in
Further, in the embodiment shown in
The channel 140 is substantially symmetrically positioned on the head 102 in the embodiment illustrated in
The center portion 130 of the channel 140 in this embodiment has an asymmetric cross-sectional shape or profile to help manage the stresses and flexing of the channel, with a trough 150 and an inward sloping depending front wall 151 and an inward sloping depending rear wall 152 extending from the trough 150 to the respective edges 146, 148 of the channel 140. The trough 150 forms the deepest (i.e. most inwardly-recessed) portion of the channel 140 in this embodiment. It is understood that the center portion 130 may have a different cross-sectional shape or profile, such as having a sharper and/or more polygonal (e.g. rectangular) shape in another embodiment. Additionally, the front wall 151 may have a length 155 measured from the front edge 146 to a center point of the trough 150. Similarly, the rear wall 152 may have a length 157 measured from the rear edge 148 to a center point of the trough 150. The length 155 of the front wall 151 may be greater than the length 157 of the rear wall 152 and may have a ratio of the length 155 of the front wall 151 to the length 157 to the rear wall 152 of approximately 3.3:1 or within a range of 2.5:1 to 4.0:1, or within a range of 1.5:1 to 5.0:1. Alternatively, the length 157 of the rear wall 152 may be greater than the length 155 of the front wall 151 and may have a ratio of the length 157 of the rear wall 152 to the length 155 to the front wall 151 of approximately 3.3:1 or within a range of 2.5:1 to 4.0:1, or within a range of 1.5:1 to 5.0:1.
The front wall 151 and rear wall 152 form an angle 159. Angle 159 may be an acute angle or alternatively may be an obtuse angle. Angle 159 may be approximately 85 degrees or may be within a range of 75 degrees to 90 degrees or within a range of 90 to 120.
Additionally, as described above, the center portion 130 of the channel 140 may have a generally constant depth across the entire length, i.e., between the ends 133, 134 of the center portion 130. In another embodiment, the center portion 130 of the channel 140 may generally increase in depth D so that the trough 150 has a greater depth at and around the midpoint of the center portion 130 and is shallower more proximate the ends 133, 134.
Further, in one embodiment, the wall thickness T of the channel 140 may be increased, as compared to the thickness at other locations of the body 108, to handle the stresses at the channel 140. In one embodiment, the wall thickness(es) T in the channel 140 (or different portions thereof) may be from 0.3 mm to 2.0 mm, or from 0.6 mm to 1.8 mm in another embodiment.
The wall thickness T may also vary at different locations within the channel 140. For example, in one embodiment, the wall thickness T is slightly greater at the center portion 130 of the channel 140 with a thickness of approximately 1.2 mm than at the heel and toe portions 131, 132 having a thickness of approximately 0.9 mm. A ratio of the thickness at the center portion 130 of the channel 140 to the thickness of the heel and toe portions 131, 132 may be within a range of 1.2:1 and 1.5:1. In a different embodiment, the wall thickness may be smaller at the center portion 130, as compared to the heel and toe portions 131, 132. The wall thickness T in either of these embodiments may gradually increase or decrease to create these differences in wall thickness in one embodiment. The wall thickness T in the channel 140 may have one or more “steps” in wall thickness to create these differences in wall thickness in another embodiment, or the channel 140 may have a combination of gradual and step changes in wall thickness. In a further embodiment, the entire channel 140, or at least the majority of the channel 140, may have a consistent wall thickness T. It is understood that any of the embodiments in
The heel and toe portions 131, 132 of the channel 140 may have different cross-sectional shapes and/or profiles than the center portion 130. For example, as seen in
Channel Ribs/Heel and Toe Design
In addition, the heel and toe portions 131, 132 of the channel 140 may have a plurality of ribs 260, 262 positioned within heel and toe portions of the channel 140. The ribs 260, 262 may provide an area of localized stiffness or resistance within the channel to improve the ability of the heel and toe portions 131, 132 to flex during golf ball impacts. The ribs 260, 262 may be connected to the rear wall 152 of the heel and toe portions 131, 132. The ribs may extend into the channel and connect to the front wall 151. The ribs 260, 262 may additionally connect to the rear edge 148, but may be free of any connection to the front edge 146. The plurality of ribs 260, 262 may separate the trough 150 of the channel on the heel and toe portions 131, 132 into forward portions 280, 282 and rear portions 284, 286 with each respective forward portion 280, 282 having a different depth, D, than each rear respective portion 284, 286 as shown in
Each of the ribs 260, 262 have front portions 264, 266 towards the front 124 of the body 108 extending which may connect to the exterior of the front wall 151 of the channel 140. Each of the ribs 260, 262 also has rear portions 268, 270 which may connect to either the rear edge 148 or the rear wall 152 of the channel 140. The ribs 260, 262 may also include upper portions 272, 274 extending to the edge of the rib and lower portions 276, 278 extending to the edge of the rib. As shown in
Each rib 260, 262 also has a first side and a second side and a rib width defined there between. The width of the rib can affect the strength and weight of the golf club. The ribs 260, 262 may have a variable width where the width at the upper portion 272, 274 is less than the lower portion 276, 278 such that the width tapers getting smaller as it transitions from the lower portion to the upper portion. The width of the rib may be in the range of approximately 4.0 mm to 14.0 mm. Alternatively, the width of the rib may be substantially constant. In addition, the ribs 260, 262 may have a hollow portion to or may be solid, or may be a configuration where one rib for example rib 262 has a hollow portion and rib 260 may be solid. Additionally, in other embodiments, the ribs 260, 262 may have a thinner width portion throughout the majority or a center portion of the rib and a thicker width portion. The thicker width portion can be near the front portions 264, 266, rear portions 268, 270, upper portions 272, 274, or lower portions 276, 278, or any other part of the rib. The thickness of the thicker width portion can be approximately 2 to 3 times the width of the thinner portion.
Each rib 260, 262 may also have a maximum height measured from the upper portion 272, 274 to the connection of the rib 260, 262 to the channel 140 along the rib in the Z-axis 18 direction. If the heel and toe portions 131, 132 of the channel 140 have a forward trough 280, 282 and a rear trough 284, 286 of different depths, the maximum height may be measured on the side of the forward trough 280, 282. The maximum height of ribs 260,262 may be approximately 10 mm and may be in the range of approximately 3 mm to 16 mm. Each rib 260, 262 may have a height at the rear portion 268, 270 greater than a height at the front portion 264, 266. Additionally, each rib 260, 262 may also have a maximum length, measured along the length of the rib at its longest length. The maximum length of ribs 260, 262 may be in the range of approximately 10 mm to 30 mm.
While only two ribs 260, 262 are shown, any number of ribs may be included on the golf club. It is understood that the ribs may extend at different lengths, widths, heights, and angles and have different shapes to achieve different weight distribution and performance characteristics of the golf club head.
The ribs 260, 262 may be formed of a single, integrally formed piece, e.g., by casting with the sole 118. Such an integral piece may further include other components of the body 108, such as the entire sole 118 (including the channel 140) or the entire club head body 108. In other embodiments the ribs 260, 262 may be connected to the channel 140 by welding or other integral joining technique to form a single piece.
In this configuration, the ribs 260, 262 diverge away from one another. As shown in
The ribs 260, 262 may be located anywhere in the channel and may be equally or unequally spaced. While only two ribs 260, 262 are shown, any number of ribs can be included on the golf club. It is understood that the ribs may extend at different lengths, widths, heights, and angles and have different shapes to achieve different weight distribution and performance characteristics.
In the driver embodiment shown in
The front edge 146 of the channel 140 may be positioned at a distance S as illustrated in
In one embodiment, part or the entire channel 140 may have surface texturing or another surface treatment, or another type of treatment that affects the properties of the channel 140. For example, certain surface treatments, such as peening, coating, etc., may increase the stiffness of the channel and reduce flexing. As another example, other surface treatments may be used to create greater flexibility in the channel 140. As a further example, surface treatments may increase the smoothness of the channel 140 and/or the smoothness of transitions (e.g. the edges 146, 148) of the channel 140, which can influence aerodynamics, interaction with playing surfaces, visual appearance, etc. Further surface texturing or other surface treatments may be used as well. Examples of such treatments that may affect the properties of the channel 140 include heat treatment, which may be performed on the entire head 102 (or the body 108 without the face 112), or which may be performed in a localized manner, such as heat treating of only the channel 140 or at least a portion thereof. Cryogenic treatment or surface treatments may be performed in a bulk or localized manner as well. Surface treatments may be performed on either or both of the inner and outer surfaces of the head 102 as well.
The compression channel 140 of the head 102 shown in
In one embodiment, the center portion 130 of the channel 140 may have different stiffness than other areas of the channel 140 and the sole 118 in general, and contributes to the properties of the face 112 at impact in one embodiment. For example, in the embodiment of
The relative dimensions of portions of the channel 140, the face 112, and the adjacent areas of the body 108 may influence the overall response of the head 102 upon impacts on the face 112, including ball speed, twisting of the club head 102 on off-center hits, spin imparted to the ball, etc. For example, a wider width W channel 140, a deeper depth D channel 140, a smaller wall thickness T at the channel 140, a smaller space S between the channel 140 and the face 112, and/or a greater face height 56 of the face 112 can create a more flexible impact response on the face 112. Conversely, a narrower width W channel 140, a shallower depth D channel 140, a greater wall thickness T at the channel 140, a larger space S between the channel 140 and the face 112, and/or a smaller face height 56 of the face 112 can create a more rigid impact response on the face 112. The length of the channel 140 and/or the center portion 130 thereof can also influence the impact properties of the face 112 on off-center hits, and the dimensions of these other structures relative to the length of the channel may indicate that the club head has a more rigid or flexible impact response at the heel and toe areas of the face 112. Thus, the relative dimensions of these structures can be important in providing performance characteristics for impact on the face 112, and some or all of such relative dimensions may be critical in achieving desired performance. Some of such relative dimensions are described in greater detail below. In one embodiment of a club head 102 as shown in
The channel 140 may have a center portion 130 and heel and toe portions 131, 132 on opposed sides of the center portion 130, as described above. In one embodiment, the center portion 130 has a substantially constant width (front to rear), or in other words, may have a width that varies no more than +/−10% across the entire length (measured along the heel 120 to toe 122 direction) of the center portion 130. The ends 133, 134 of the center portion 130 may be considered to be at the locations where the width begins to increase and/or the point where the width exceeds +/−10% difference from the width W along a vertical plane passing through the face center FC. In another embodiment, the width W of the center portion 130 may vary no more than +/−5%, and the ends 133, 134 may be considered to be at the locations where the width exceeds +/−5% difference from the width W along a vertical plane passing through the geometric centerline of the sole 118 and/or the body 108. The center portion 130 may also have a depth D and/or wall thickness T that substantially constant and/or varies no more than +/−5% or 10% along the entire length of the center portion 130. The embodiments shown in
In one embodiment of a club head 102 as shown in
The club head 102 in any of the embodiments described herein may have a wall thickness T in the channel 140 that is different from the wall thickness T at other locations on the body 108 and/or may have different wall thicknesses at different portions of the channel 140. The wall thickness T at any point on the club head 102 can be measured as the minimum distance between the inner and outer surfaces, and this measurement technique is considered to be implied herein, unless explicitly described otherwise. Wall thicknesses T in other embodiments (e.g., as shown in
Alternatively, areas of the center portion 130 may have a variable thickness. The variable thicknesses may be approximately 1.5 to 3.25 times thicker than the toe portion 132. The front edge 146 of the center portion 130 of the channel may have a wall thickness T that is approximately 1.8 mm or 1.7 to 1.9 mm, and the wall thickness T may decrease to approximately 1.1 mm at the trough 150. The wall thickness T may be generally constant between the trough 150 and the rear edge 148.
The wall thickness T in the embodiment in
The various dimensions of the center portion 130 of the channel 140 of the club head 102 in
Void Structure of Club Head
The club head 102 may utilize a geometric weighting feature in some embodiments, which can provide for reduced head weight and/or redistributed weight to achieve desired performance. For example, in the embodiment of
In one embodiment the void 160 is generally V-shaped, as illustrated in
In one exemplary embodiment, the base support wall 170 has a height defined between the cover 161 and the sole 118, and is positioned proximate a central portion or region of the body 108 and has a surface that faces into the void 160. The base support wall 170 extends from the cover 161 to the sole 118 in one embodiment. In the embodiment of
The walls 166, 167 in the embodiment of
In one embodiment, the walls 166, 167, the base support wall 170, and/or the cover 161 may each have a thin wall construction, such that each of these components has inner surfaces facing into the inner cavity 106 of the club head 102. In another embodiment, one or more of these components may have a thicker wall construction, such that a portion of the body 108 is solid. Additionally, the walls 166, 167, the base support wall 170, and the cover 161 may all be integrally connected to the adjacent components of the body 108, such as the base member 163 and the legs 164, 165. For example, at least a portion of the body 108 including the walls 166, 167, the base support wall 170, the cover 161, the base member 163, and the legs 164, 165 may be formed of a single, integrally formed piece, e.g., by casting. Such an integral piece may further include other components of the body 108, such as the entire sole 118 (including the channel 140) or the entire club head body 108. As another example, the walls 166, 167, the base support wall 170, and/or the cover 161 may be connected to the sole 118 by welding or other integral joining technique to form a single piece. In another embodiment, the walls 166, 167, the base support wall 170, and/or the cover 161 may be formed of separate pieces.
An angle may be defined between the legs 164, 165 in one embodiment, which angle can vary in degree, and may be, e.g., a right angle, acute angle or obtuse angle. For example, the angle can be in the general range of 30 degrees to 110 degrees, and more specifically 45 degrees to 90 degrees. The angle between the legs 164, 165 may be relatively constant at the sole 118 and at the cover 161 in one embodiment. In another embodiment, this angle may be different at a location proximate the sole 118 compared to a location proximate the cover 161, as the walls 166, 167 may angle or otherwise diverge away from each other. Additionally, in other embodiments, the void 160 may be asymmetrical, offset, rotated, etc., with respect to the configuration shown in
In another embodiment, the walls 166, 167 may be connected to the underside of the crown 116 of the body 108, such that the legs 164, 165 depend from the underside of the crown 116. In other words, the cover 161 may be considered to be defined by the underside of the crown 116. In this manner, the crown 116 may be tied or connected to the sole 118 by these structures in one embodiment. It is understood that the space 162 between the cover 161 and the underside of the crown 116 in this embodiment may be partially or completely nonexistent.
Fairway Wood—Channel Parameters
In one embodiment of a club head 102 as shown in
In the embodiment illustrated in
The various dimensions of the center portion 130 of the channel 140 of the club head 102 in
Hybrid Club Head—Channel Parameters
In one embodiment of a club head 102 as shown in
In the embodiment illustrated in
The various dimensions of the center portion 130 of the channel 140 of the club head 102 in
Channel Dimensional Relationships
The relationships between the dimensions and properties of the face 112 and various features of the body 108 (e.g., the channel 140 and/or ribs 204, 206, 208, 232, 234) can influence the overall response of the head 102 upon impacts on the face 112, including ball speed, twisting of the club head 102 on off-center hits, spin imparted to the ball, etc. Many of these relationships between the dimensions and properties of the face 112 and various features of the body 108 and channel 140 and/or ribs is shown in Tables 1 and 2 below.
The various dimensions of the center portion 130 of the channel 140 of the club head 102 in
The face height 56 in the embodiment of
The face height 56 in the embodiment of
The various dimensions of the center portion 130 of the channel 140 of the club head 102 in
The various dimensions of the center portion 130 of the channel 140 of the club head 102 in
The various dimensions of the center portion 130 of the channel 140 and the face 112 of the club head 102 in
The various dimensions of the center portion 130 of the channel 140 and the face 112 of the club head 102 in
The various dimensions of the center portion 130 of the channel 140 and the face 112 of the club head 102 in
Face Design
Another aspect to club head 102 of embodiments shown in
A face design may have a variable thickness to better handle the stresses caused from the golf ball impact while balancing the stiffness of the face. As discussed earlier, the face 112 may have a ball striking surface and an inner surface 111. The inner surface 111 may have multiple regions having different thicknesses.
As shown in
As discussed earlier, the body 108 and the face 112 may be formed separate and connected to form the golf club head 102 using an integral joining technique to form an interior cavity. The body 108 may have a flange 426 that forms a portion of the ball striking surface 110. The flange 426 and the face 112 may form a joint 428 defining an upper edge 418, a toe edge 420, a lower edge 422, and a heel edge 424 of the face 112.
As discussed above, the face 112 may have multiple thickness regions. For example, the center region 402 may have a first thickness, the toe region 404 may have a second thickness, the heel region 406 may have a third thickness, a upper region may have a fourth thickness, the lower region may have a fifth thickness, and the toe transition region may have a sixth thickness, and the heel transition region may have a seventh thickness. The center region 402 may have a thickness that is greater than the other regions, and the toe region 404 may have a thickness that is less than the other regions. Alternatively, the heel region 406 may have the same thickness as the toe region 404. Additionally, the upper edge 418 and the lower edge 422 may have a thickness greater than the thickness of the toe region 404 and the heel region 406.
The center region 402 may have a generally rectangular shape with rounded corners 432. The rectangular shape may be defined to encompass an area where most golfers tend to impact the striking face 110 with an impact centered within approximately 12 mm on the heel and toe side of the face center location 40 and a radius approximately the size of a golf ball as it compresses during impact. For example, a center region 402 of clubhead 102 of the embodiments shown in
The center region 402 may have a center point 440 positioned in a heel-to-toe direction at approximately the face center location 40 or within 2 mm on either side of the face center location 40. Additionally, the center region 402 may have a center point 440 positioned in a crown-to-sole direction where the center point 440 is located above the face center location 40 (towards the crown 116 of the golf club head). For example, the center point 440 of the center region 402 of the face 112 may be located approximately 3 mm above the face center location 40 or within a range of 1 to 4 mm above the face center location 40. The center region 402 may have a surface area of approximately 580 mm2, or within a range of 480 to 620 mm2. In addition, the surface area of the center region 402 compared to a total surface area defined within boundaries of the upper edge 418, toe edge 420, lower edge 422, and heel edge 424 may be approximately 21 percent of the total surface area, or within a range of 18 to 23 percent.
Because the center region 402 receives the majority of the impact stresses on the face 112, the center region's 402 corresponding thickness may be greater than the other regions. The center region 402 may have a constant thickness face thickness. For example, the center region may have a thickness of approximately 3.4 mm, or within a range of 3.2 to 3.6 mm throughout the entire center region 402.
As a means of reducing the weight as much as possible while also providing an effective response to the ball impact, the toe and heel regions 404, 406 may have a constant thickness similar to the center region 402. Because the face height is less at the toe and heel than at the center, the thickness may be reduced relative to the center region to provide the proper overall stiffness for the face along with balancing the impact stresses. The thickness of the toe region 404 may be the same as the thickness of the heel region 406. For example, in the embodiment shown in
The upper and lower regions 408, 410 may have a variable thickness, such as a ramped thickness that decreases as a function of the distance away from the center region 402 to the upper edge 418 and lower edge 422 respectively. The ramped thickness of the upper and lower regions 408, 410 may have a linear slope, or may a radial curvature, or the curvature may fit any polynomial. While the thickness of the upper and lower regions 408, 410 may not be constant, the upper and lower edges 418, 422 may have a constant thickness. The thickness of the upper and lower edges 418, 422 may be greater than the thickness on the toe and heel regions 404, 406. The upper region 408 may have a slope that is greater (reduces in thickness at a faster rate as the upper region 408 moves away from the center region 402) than the slope of the lower region 410. The surface areas of the upper and lower regions may be approximately 390 mm2 and 440 mm2 respectively.
The toe and heel transition regions 412, 414 may have a variable thickness, such as a ramped thickness that decreases as a function of the distance away from the center region 402 to the toe region 404 and the heel region 406 respectively. The ramped thickness of the toe and heel regions 412, 414 may have a linear slope, or may a radial curvature, or the curvature may fit any polynomial. The toe and heel transition regions may be formed with a large radius to avoid any stress concentrations that would be caused by sharp corners. The surface area of the toe and heel transition regions 412, 414 may be approximately 200 mm2 and 180 mm2 respectively, or may be in a range between 160 and 220 mm2.
As shown in
Another aspect that may improve the response of the face 112 is the geometry of the transition 121 from the face 112 to the crown 116 as shown in
Face Design Fairway Wood/Hybrid
The center region 402 of the embodiments of
The regions of the face design of the embodiments of
While the thickness of the upper and lower regions 408, 410 may not be constant, the upper and lower edges 418, 422 may have a constant thickness. The thickness of the upper and lower edges 418, 422 may be the same than the thickness on the toe and heel regions 404, 406. The lower region 410 may have a slope that is greater (it reduces in thickness at a faster rate as it moves away from the center region 402) than the slope of the upper region 408.
Similar to the embodiment shown in
Relationships Between Face and Channel
The relationships of the face design and how the face design relates to the may be expressed in a series of ratios. A ratio of the thickness of the center region 402 to the thickness of the toe region 404 may have a ratio in a range of 1.27:1 to 1.55:1. A ratio of the face thickness of the center region 402 to the thickness of the center portion 130 of the channel 140 may be within a range of 2.5:1 to 2.9:1. Additionally, a ratio of the face thickness of the toe region 404 to the thickness of the toe portion 132 may be within a range of 2.5:1 to 2.9:1.
Structural Ribs of Club Head
The ball striking heads 102 according to the present invention can include additional features that can influence the impact of a ball on the face 112, such as one or more structural ribs. Structural ribs can, for example, increase the stiffness of the striking head 102 or any portion thereof. Strengthening certain portions of the striking head 102 with structural ribs can affect the impact of a ball on the face 112 by focusing flexing to certain parts of the ball striking head 102 including the channel 140. For example, in some embodiments, greater ball speed can be achieved at impact, including at specific areas of the face 112, such as off-center areas. Structural ribs and the locations of such ribs can also affect the sound created by the impact of a ball on the face 112.
In other embodiments club 102 can include internal and/or external ribs. As depicted in at least in
Each of the ribs 180, 182 have front end portions 184, 186 toward the front 124 of the body 108 extending to the edge of the rib, and rear end portions 188, 190 toward the rear 126 of the body 108 extending to the edge of the rib. In one embodiment the front end portions 184, 186 of ribs 180, 182 can connect to the first wall 166 and the second wall 167 respectively, and the rear end portions 188, 190 can extend substantially to the rear 126 of the club. The external ribs 180, 182 also include upper portions 192, 194 extending to the edge of the rib and lower portions 196, 198 extending to the edge of the rib. The upper portions 192, 194 of ribs 180, 182 connect to the cover 161. The lower portions 196, 198 of ribs 180, 182 can define a portion of the bottom or sole 118 of the golf club. As shown in
The ribs 180, 182 may be located anywhere in the heel-to-toe direction and in the front-to-rear direction. For example, ribs 180, 182 may be equally or unequally spaced in the heel-toe direction from the center of gravity or from the face center. In one embodiment, the front end portion 184 of rib 180 may be located towards the heel 120 from the face center location 40 measured in the X-axis 14 direction approximately 15 mm, or may be in the range of 0 to 25 mm. The front end portion 186 of rib 182 may be located towards the toe 122 from the face center location 40 measured along the X-axis 14 approximately 33 mm, or may be in the range of 0 to 45 mm. In one embodiment, the front end portion 184 of rib 180 may be located towards the rear 126 from the striking face measured in the Y-axis 16 direction approximately 53 mm, or may be in the range of 20 to 70 mm. The front end portion 186 of rib 182 can be located towards the rear 126 from the striking face measured along the Y-axis 16 approximately 55 mm, or may be in the range of 20 to 70 mm.
Each rib 180, 182 also has an internal side 189, 191 and an external side 193, 195 and a width defined there between. The width of the ribs 180, 182 can affect the strength and weight of the golf club. As shown in
Ribs 180, 182 may also be described as having a vertical portion 197 and a transverse portion 199 such that the portions 197 and 199 form a T-shaped or L-shaped cross-section. As shown in
Each rib 180, 182 also has a maximum height defined by the distance between the upper portions 192, 194 and the lower portions 196, 198 measured along the ribs 180, 182 in the Z-axis 18 direction. A maximum height of the ribs 180, 182 can be in the range of approximately 5 to 40 mm. Additionally, each rib 180, 182 also has a maximum length, defined by the distance between the front end portions 184, 186 and rear end portions 188, 190 measured along the ribs 180, 182 in the plane defined by the X-axis 14 and the Y-axis 16. The length of rib 180 can be approximately 54 mm, or may be in the range of approximately 20 to 70 mm; and the length of rib 182 can be approximately 53 mm, or may be in the range of approximately 20 to 70 mm. In another embodiment, the length of rib 180 can be approximately 48 mm, or may be in the range of approximately 20 to 70 mm; and the length of rib 182 can be approximately 50 mm, or may be in the range of approximately 20 to 70 mm. The ratio of the length of the ribs 180, 182 to the total head breadth 60 of the club in the front 124 to rear 126 direction can be approximately 1:2 (rib length/total head breadth) or approximately 0.75:2 to 1.25:2.
While only two external ribs 180, 182 are shown, any number of ribs can be included on the golf club. It is understood that the ribs may extend at different lengths, widths, heights, and angles and have different shapes to achieve different weight distribution and performance characteristics.
The external ribs 180, 182 may be formed of a single, integrally formed piece, e.g., by casting with the cover 161. Such an integral piece may further include other components of the body 108, such as the entire sole 118 (including the channel 140) or the entire club head body 108. In other embodiments the ribs 180, 182 can be connected to the cover 161 and/or sole 118 by welding or other integral joining technique to form a single piece.
As shown in at least
Each of the ribs 204, 206, 208 have front end portions 210, 212, 214 toward the front 124 of the body 108 extending to the edge of the rib, and rear end portions 216, 218 (not shown), 220 (not shown) toward the rear 126 of the body 108 extending to the edge of the rib. In one embodiment the front end portions 210, 212, 214 include a concave curved shape. In other embodiments, the front end portions 210, 212, 214 can have a convex curved shape, a straight shape, or any other shape.
The upper portions of ribs 204, 206, 208 can connect to the internal side of the crown 116, and the lower portions can connect to an internal side of the cover 161. In other embodiments the ribs may only be connected to the cover 161, or the crown 116, or from the crown 116 to the sole 118.
Each rib 204, 206, 208 also has first side oriented towards the heel 131 and a second side oriented towards the toe 132 and a width defined there between. The width of the ribs can affect the strength and weight of the golf club. As shown in 9A, the ribs 204, 206, 208 can have an approximately constant width which may be approximately 0.9 mm, or may be in the range of approximately 0.5 to 5.0 mm. This width may be substantially the same for each rib. In other embodiments, the width of each rib can vary. Additionally, for example, the ribs 204, 206, 208 may include a thinner width portion throughout the majority, or a center portion, of the rib. The ribs 204, 206, 208 may also include a thicker width portion. The thicker width portion may be near the front end portions 210, 212, 214, rear end portions 216 (not shown), 218 (not shown), 220 (not shown), upper portions or lower portions. The thickness of the thicker width portion can be approximately 2 to 3 times the width of the thinner portion.
Each of ribs 204, 206, 208 also has a maximum height defined by the maximum distance between the upper portions or lower portions measured along the rib in the Z-axis 18 direction. The maximum height of ribs 204, 206, 208 may be approximately in the range of approximately 25 to 35 mm, or in the range of approximately 15 to 50 mm. Additionally, each rib 204, 206, 208 also has a maximum length, measured along the rib in Y-axis 16 direction. The maximum length of rib 204 can be approximately 33 mm, or may be in the range of approximately 20 to 50 mm. The maximum length of rib 206 may be approximately 35 mm, or may be in the range of approximately 20 to 50 mm. The maximum length of rib 208 may be approximately 30 mm, or may be in the range of approximately 25 to 50 mm. As shown in
While three upper internal ribs 204, 206, 208 are shown, any number of ribs can be included on the golf club. It is understood that the ribs may extend at different lengths, widths, heights, and angles and have different shapes to achieve different weight distribution and performance characteristics.
The upper internal ribs 204, 206, 208 may be formed of a single, integrally formed piece, e.g., by casting with the cover 161 and/or crown 116. Such an integral piece may further include other components of the body 108, such as the entire sole 118 (including the channel 140), the crown 116, or the entire club head body 108. In other embodiments the ribs 204, 206, 208 can be connected to the cover 161 and/or crown 116 by welding or other integral joining technique to form a single piece.
The combination of both the internal ribs 204, 206, and 208 along with the external ribs 180 and 182 may be positioned relative to each other such that at least one of the external ribs 180 and 182 and at least one of the internal ribs 204, 206, and 208 may be located where the at least one external rib and the at least one internal rib occupy the same location in a view defined by the plane defined by the X-axis 14 and Y-axis 16 (or intersect if extended perpendicular to the view) but may be separated by only the wall thickness between them. The external rib and internal rib then diverge at an angle. The angle between the external and internal rib can be an angle in the range of 4 to 10 degrees or may be in the range of 0 to 30 degrees. In other configurations, the at least one external rib and the at least one internal rib occupy the same point in a view defined by the plane defined by the X-axis 14 and Z-axis 18 (or intersect if extended perpendicular to the view) but are separated by only the wall thickness between them. The external rib and internal rib then diverge at an angle. The angle that the external and internal rib can be an angle in the range of 4 to 10 degrees or may be in the range of 0 to 30 degrees.
As shown in at least
Each of the ribs 232, 234 have front end portions 236, 238 towards the front 124 of the body 108 extending to the edge of the rib which may connect to the interior of the rear edge 148 of the channel 140. Each of the ribs 232, 234 also has rear end portions 240, 242, respectively, towards the rear 126 of the body 108 extending to the edge of the rib which may connect to the first and second walls 166, 167. The lower internal ribs 232, 234 also include upper portions 244, 246 extending to the edge of the rib and lower portions 248, 250 extending to the edge of the rib. As shown in
Each rib 232, 234 also has an internal side and an external side and a width defined there between. The width of the rib may affect the strength and weight of the golf club. The ribs 232, 234 may have a substantially constant rib width of approximately 1 mm, or may be in the range of approximately 0.5 to 5.0 mm, or may have a variable width. Additionally, in some embodiments, for example, the ribs 232, 234 may have a thinner width portion throughout the majority or a center portion of the rib and a thicker width portion. The thicker width portion may be near the front end portions 236, 238, rear end portions 240, 242, upper portions 244, 246, or lower portions 248, 250, or any other part of the rib. The thickness of the thicker width portion may be approximately 2 to 3 times the width of the thinner portion.
Each rib 232, 234 also has a maximum height defined as the maximum distance between the upper portions and the lower portions measured along the rib in the Z-axis 18 direction. The maximum height of rib 232 can be approximately 16 mm+/−2 mm or may be in the range of approximately 0 to 40 mm, and the maximum height of rib 234 may be approximately 20 mm+/−2 mm or may be in the range of approximately 0 to 40 mm. In another embodiment, the maximum height of rib 232 may be approximately 20 mm, or may be in the range of approximately 0 to 30 mm; and the maximum height of rib 234 can be approximately 21 mm, or may be in the range of approximately 0 to 30 mm. Additionally, each rib 232, 234 also has a maximum length defined as the maximum distance between the front end portions and rear end portions measured along the rib in the Y-axis 16 direction. The maximum length of rib 232 may be approximately 46 mm, or may be in the range of approximately 0 to 60 mm; and the maximum length of rib 234 may be approximately 46 mm, or may be in the range of approximately 0 to 60 mm. In another embodiment, the maximum length of rib 232 may be approximately 40 mm, or may be in the range of approximately 0 to 50 mm; and the maximum length of rib 234 may be approximately 39 mm, or may be in the range of approximately 0 to 50 mm.
While only two lower internal ribs 232, 234 are shown, any number of ribs may be included on the golf club. It is understood that the ribs may extend at different lengths, widths, heights, and angles and have different shapes to achieve different weight distribution and performance characteristics.
The lower internal ribs 232, 234 may be formed of a single, integrally formed piece, e.g., by casting with the sole 118. Such an integral piece may further include other components of the body 108, such as the entire sole 118 (including the channel 140) or the entire club head body 108. In other embodiments the ribs 232, 234 can be connected to the crown 116 and/or sole 118 by welding or other integral joining technique to form a single piece.
Additionally, the rear end portions 240, 242 of the internal ribs 232, 234 and the forward most portions 184, 186 of the external ribs 180, 182 may be positioned relative to each other by a dimension defined in a direction parallel to the X-axis 14 between 2 to 4 mm or may be in the range of 1 to 10 mm.
Internal Rib Configuration for Clubhead without Void
A golf club head 102 including channel 140 as described above, but without void 160 is shown in
Each of the ribs 300, 302 have front end portions 304, 306 towards the front 124 of the body 108 extending to the edge of the rib which can connect to the interior of the rear edge 148 of the channel 140. Each of the ribs 300, 302 also has rear end portions 308 (not shown), 310 (not shown), towards the rear 126 of the body 108 extending to the edge of the rib which can extend and/or connect to the rear 126 of the body 108. The ribs 300, 302 also include upper portions 312, 314 extending to the edge of the rib and lower portions 316, 318 extending to the edge of the rib. As shown in
Each rib 300, 302 also has first side and a second side and a rib width defined there between. The width of the rib can affect the strength and weight of the golf club. The ribs 300, 302 can have a substantially constant rib width of approximately 0.9 mm+/−0.2 mm or may be in the range of approximately 0.5 to 5.0 mm, or can have a variable rib width. Additionally, in some embodiments, for example, the ribs 300, 302 can have a thinner width portion throughout the majority or a center portion of the rib and a thicker width portion. The thicker width portion can be near the front end portions 304, 306, rear end portions 308, 310, upper portions 312, 314, or lower portions 316, 318, or any other part of the rib. The thickness of the thicker width portion can be approximately 2 to 3 times the width of the thinner portion.
Each rib 300, 302 may also have a maximum height measured along the rib in the Z-axis 18 direction. The maximum height of rib 300, 302 can be approximately may be in the range of approximately 0 to 60 mm, and may extend to the crown 116. Additionally, each rib 300, 302 may also have a maximum length, measured along the rib in the Y-axis 16 direction. The maximum length of ribs 300, 302 may be in the range of approximately 0 to 120 mm and can extend substantially to the rear 126 of the club.
While only two ribs 300, 302 are shown, any number of ribs can be included on the golf club. It is understood that the ribs may extend at different lengths, widths, heights, and angles and have different shapes to achieve different weight distribution and performance characteristics.
The ribs 300, 302 may be formed of a single, integrally formed piece, e.g., by casting with the sole 118. Such an integral piece may further include other components of the body 108, such as the entire sole 118 (including the channel 140) or the entire club head body 108. In other embodiments the ribs 300, 302 can be connected to the crown 116 and/or sole 118 by welding or other integral joining technique to form a single piece.
While internal and external ribs have generally been described in relation to the embodiment disclosed in
Fairway Woods/Hybrid Club Heads—Structural Ribs
As described above with regards to the embodiments shown in
As depicted in fairway wood and hybrid embodiments shown in
The ribs 180, 182 may be located anywhere in the heel-to-toe direction and in the front-rear direction. For example, ribs 180, 182 may be equally or unequally spaced in the heel-to-toe direction from the center of gravity or from the face center. In one embodiment, as shown in
As depicted in embodiments shown in
Each rib 180, 182 also has a maximum height defined by the distance between the upper portions 192, 194 and the lower portions 196, 198 measured along the ribs 180, 182 in the Z-axis 18 direction. A maximum height of the ribs 180, 182 of
Additionally, as shown in
Another aspect of the rib structure for the embodiment shown in
The various structural dimensions, relationships, ratios, etc., described herein for various components of the club heads 102 in
It is understood that one or more different features of any of the embodiments described herein can be combined with one or more different features of a different embodiment described herein, in any desired combination. It is also understood that further benefits may be recognized as a result of such combinations.
Golf club heads 102 incorporating the body structures disclosed herein, e.g., channels, voids, ribs, etc., may be used as a ball striking device or a part thereof. For example, a golf club 100 as shown in
The ball striking devices and heads therefor having channels as described herein provide many benefits and advantages over existing products. For example, the flexing of the sole 118 at the channel 140 results in a smaller degree of deformation of the ball, which in turn can result in greater impact efficiency and greater ball speed at impact. As another example, the more gradual impact created by the flexing can result in greater energy and velocity transfer to the ball during impact. Still further, because the channel 140 extends toward the heel and toe edges 114 of the face 112, the head 102 can achieve increased ball speed on impacts that are away from the center or traditional “sweet spot” of the face 112. The greater flexibility of the channels 140 near the heel 120 and toe 122 achieves a more flexible impact response at those areas, which offsets the reduced flexibility due to decreased face height at those areas, further improving ball speed at impacts that are away from the center of the face 112. As an additional example, the features described herein may result in improved feel of the golf club 100 for the golfer, when striking the ball. Additionally, the configuration of the channel 140 may work in conjunction with other features (e.g. the ribs 204, 206, 208, 232, 234, and the access 128, etc.) to influence the overall flexibility and response of the channel 140, as well as the effect the channel 140 has on the response of the face 112. Further benefits and advantages are recognized by those skilled in the art.
The ball striking devices and heads therefore having a void structure as described herein also provide many benefits and advantages over existing products. The configuration of the void 160 provides the ability to distribute weight more towards the heel 120 and toe 122. This can increase the moment of inertia (MOI) approximately a vertical axis through the CG of the club head (MOIz-z). Additionally, certain configurations of the void can move the CG of the club head forward, which can reduce the degree and/or variation of spin on impacts on the face 112. The structures of the legs 164, 165, the cover 161, and the void 160 may also improve the sound characteristics of the head 102. It is further understood that fixed or removable weight members can be internally supported by the club head structure, e.g., in the legs 164, 165, in the interface area 168, within the void 160, etc.
Additional structures such as the internal and external ribs 180, 182, 204, 206, 208, 232, 234 as described herein also provide many benefits and advantages over existing products. For example, the configuration of the internal and external ribs provide for the desired amount of rigidity and flexing of the body. The resulting club head provides enhanced performance and sound characteristics.
The benefits of the channel, the void, and other body structures described herein can be combined together to achieve additional performance enhancement. Further benefits and advantages are recognized by those skilled in the art.
While the invention has been described with respect to specific examples including presently preferred modes of carrying out the invention, those skilled in the art will appreciate that there are numerous variations and permutations of the above described systems and methods.
This application claims priority to Provisional application, U.S. Ser. No. 62/217,503 filed Sep. 11, 2015, and is a continuation-in-part to Non-Provisional application, U.S. Ser. No. 14/725,966 filed May 29, 2015, and Non-Provisional application, U.S. Ser. No. 14/593,752 filed Jan. 9, 2015, which claims priority to Provisional application, U.S. Ser. No. 62/015,237, filed Jun. 20, 2014. The above-identified U.S. applications are herein incorporated by reference in their entirety.
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Number | Date | Country | |
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20160096082 A1 | Apr 2016 | US |
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Number | Date | Country | |
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Child | 14968513 | US | |
Parent | 14593752 | Jan 2015 | US |
Child | 14725966 | US |