Abstract: A golf club head includes a forward section and a body section to define a closed internal volume. The forward section has a strike face, a frame that surrounds the strike face, and a flange extending from the frame. The body section is formed from a molded polymeric material, and includes a forward edge that defines a receiving portion adapted to receive the flange and a weight receiving feature spaced apart from the forward edge. The body section further includes a reinforcing structure protruding into the internal volume and extending between the weight receiving feature and the forward edge. The reinforcing structure is operative to transfer impact loads between the weight receiving feature and the metallic forward section.

Abstract: A golf club head with a central body component is disclosed herein. The central body component includes a crown portion and a sole portion. The crown portion is composed of a continuous carbon fiber reinforced epoxy material. The sole portion is composed of a chopped carbon fiber reinforced vinyl ester sheet molding compound material. The central body component has a front opening and a rear opening with a hollow interior.

Abstract: A golf club head with hosel reinforcement structures arrayed around a hosel axis and extending from an inner mold line of the golf club head within a reinforcement region is disclosed herein. The reinforcement structures include ribs and scallops, which are arranged in specific positions within the reinforcement region to maximize hosel bendability without sacrificing the structural integrity of the golf club head.

Abstract: Described herein are embodiments of golf club heads having a balance of the following parameters: a low and back club head center of gravity position, a high moment of inertia, and low aerodynamic drag. Methods of manufacturing the embodiments of golf club heads having a balance of club head center of gravity position, moment of inertia, and aerodynamic drag are also described herein.

Abstract: A golf club connecting apparatus for securely connecting a golf club shaft and a club head having a hosel portion is disclosed. The apparatus could be advantageously employed with various types of golf clubs. The apparatus comprises a hosel adapter, a shaft adapter, and at least one fastener, for example, a nut. The hosel adapter is configured to insert into the hosel portion such that the hosel adapter is positioned within the cylindrical sleeve of the hosel portion. The shaft adapter is securely affixed to the terminal end of the golf club shaft, wherein the shaft adapter is configured to insert into the hosel adapter via a longitudinal bore. The fastener is configured to threadably engage to the hosel adapter via the plurality of threads, thereby securing the club head and the golf club shaft together by inserting the shaft adapter into the hosel adapter.

Abstract: A high moment of inertia aerodynamic golf club head with a low deep center of gravity location and producing reduced aerodynamic drag forces. The club head has crown section attributes that impart beneficial aerodynamic properties and performance.

Abstract: Examples of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a body portion of a golf club head may include a cavity having an opening and an interior structure defined by a wall portion and a base portion. A hosel portion may include an insert portion and a neck portion extending therefrom. The hosel portion may be attached to the body portion by an interference fit between the neck portion and the opening of the cavity. The insert portion may be received inside the cavity and may be spaced apart from the interior structure of the cavity. A space between the insert portion and the interior structure of the cavity may be partially or entirely filled with an adhesive to hold the hosel portion in place. Other examples may be described and claimed.

Abstract: A golf club with a multi-material face is disclosed herein. More specifically, the golf club head in accordance with the present invention has a multi-material striking face portion that is made out of a backing layer having a frontal pocket, made out of titanium, and an insert, made out of a composite material, adapted to be inserted into the frontal pocket. The frontal pocket and the insert could have complementary dovetail shaped undercut features to create a mechanical bond between these two components.

Abstract: Summary A golf club face member is made by a manufacturing process, such as 3D printing, for a complex topology that is sturdy with good CT. 3D printing creates a face in which struts, a lattice-like structure, a waffle-iron pattern, or interior voids provide great strength and low mass. A golf club head has a club head body defining a heel portion and a toe portion and a hosel extending upward from the heel portion when the club head is at address. A face member is disposed between the heel portion and the toe portion such that it faces forward when the club head is at address. At least portion of the face member comprises a 3D printed material such as a 3D printed or sintered metal.

Abstract: A golf club head with a hosel hole cover that helps improve the performance of the golf club head is disclosed. More specifically, the present invention relates to a golf club head having a hosel hole cover at a bottom portion of an interchangeable connection system that not only provides improved performance of the golf club head by strategically utilizing an existing opening to adjust the weighting of a golf club head, but it also improves the aerodynamics of the golf club head by eliminating undesirable recesses that could be detrimental to the aerodynamics of a golf club head.

Abstract: The invention is an alternative fitting system for golf clubs including a adapted production head with a threaded hosel and a shaft sleeve adapter and a compression nut. The shaft sleeve adapter is permanently adhered to a golf club shaft. The compression nut holds together the shaft sleeve adapter and the threaded hosel of the club head. Alignment notches on the threaded hosel and alignment features on the shaft sleeve adapter prevent unwanted rotation. Furthermore, some embodiments of the shaft sleeve adapter comprise an angled bore hole, which allows for various loft and lie configurations.

Abstract: A high characteristic time golf club incorporating a shaft connection system socket extending from the bottom portion of the golf club head into the interior of the outer shell toward the top portion of the club head.

Abstract: The present invention relates to an electrical machine comprising a rotor (10) and a stator, rotor (10) being formed by assembling a rotor body (4) and a rotor shaft (1). According to the invention, rotor shaft (1) is knurled and the outside diameter of rotor shaft (1) is greater than the inside diameter of rotor body (4), by a value ranging between 0.05 mm and 0.3 mm. The present invention further relates to a method of manufacturing such an electrical machine.

Abstract: An aerodynamic golf club head with a low center of gravity and producing reduced aerodynamic drag forces. The club head has crown section attributes and material attributes that impart beneficial aerodynamic properties and performance.

Abstract: Disclosed herein is a golf club head that comprises a body. The body comprises a sole portion, a crown portion, a skirt portion, and a face portion, positioned at a forward region of the golf club head, opposite a rearward region of the golf club head, and extending from a toe region to a heel region of the golf club head. At least a portion of the body is made of a titanium alloy. The golf club head also comprises a large weight, coupled to the sole portion of the body and made of a steel alloy. A mass of the large weight is at least 40% of a mass of the portion of the body made of the titanium alloy. A total mass of the large weight and the portion of the body made of the titanium alloy is at least 210 grams.

Abstract: A golf club head includes a metal frame having a sole opening, a composite laminate crown joined to the frame, a composite laminate sole insert joined to the frame and overlying the sole opening, and a thermoplastic composite component overmolded on the sole insert. The composite component may include a weight track, ribs, supports or other features. A method of making the golf club includes the steps of forming a frame having a sole opening, forming a composite laminate sole insert, forming a composite laminate crown insert, injection molding a thermoplastic composite head component over the sole insert to create a sole insert unit, and joining the sole insert unit and crown insert to the frame.

Abstract: Embodiments of golf club heads with hosel inserts are presented herein. Other embodiments can be described and claimed.

Abstract: A golf club head includes a face, a club head body, and a hosel. The hosel has a tubular hosel body extending along a longitudinal axis and defining a bore. The bore is configured to receive a golf club shaft or a shaft adapter. The tubular hosel body is molded from a polymeric material that includes a resin and a plurality of fibers, each fiber has a length of from about 0.01 mm to about 12 mm.

Abstract: A golf club with a multi-material face is disclosed herein. More specifically, the golf club head in accordance with the present invention has a multi-material striking face portion that can be comprised out of a metallic outer layer combined with a composite mid-section, all forming a face cup construction that can be connected to an aft body. The composite portion of the multi-material face disclosed in accordance with the present invention may generally have an inter laminar shear strength of greater than about 60 MPa, most preferably greater than about 60 MPa and less than about 145 MPa.

Abstract: Embodiments of golf club heads with hosel inserts are presented herein. Other embodiments can be described and claimed.

Abstract: A golf club head has a hollow structure composed of a head main body including a face portion provided with an opening and a face member fitted in the opening and welded to the head main body. The welded part between the face member and the head main body includes a crown-side welded part positioned substantially at the upper edge or alternatively spaced apart from the upper edge toward the lower edge by a certain distance, and a sole-side welded part spaced apart from the lower edge toward the upper edge by a certain distance which is more than zero and more than the distance. The face portion is provided between the sole-side welded part and the lower edge with a sole-side thin area whose thickness is less than a thickness of the face member.

Abstract: A shaft insert (or external connecting segment) with greater flexibility than the substrate shaft allowing for a more flexible zone in an area of separation between two separated portions of the substrate shaft. The flexible connection is intended to be installed between two segments of the separated substrate shaft primarily on a golf putter with the flexible connection within 5 inches of the base of the club in total compliance with USGA (United States Golf Association) Rule 2, Appendix II. 2. b. requiring any change from the continuous shaft be within 5 inches of the club base. The shaft flex connection is designed to be symmetrical around its cross section with equal flexibility and torsional displacement in all directions in compliance with USGA Rule 2, Appendix 2. c. requiring golf shafts to be equally flexible with equal torsional displacement in all directions.

Abstract: The present invention is directed to a multi-piece golf club head having a metal hosel with adjustability features that is cast separately from a face component, sole, and crown, and then is permanently affixed to those other parts after casting is complete. The face component, sole, and crown may be composed of any suitable materials, but preferably each of the face component, the sole, and the crown are stamped from a metal material and are welded to the hosel.

Abstract: A golf club head includes a face; a body, the body defining an interior and an exterior; the face and the body together defining a center of gravity, the center of gravity being proximate the face; a coefficient of restitution feature defined in the body; wherein the coefficient of restitution feature defines a gap in the body. A golf club head includes a face and a golf club body; the face and the golf club body defining a center of gravity, the center of gravity defined a distance, ?z, from a ground plane as measured along a z-axis, the center of gravity defined a distance, CGy, from the center face along the y-axis.

Abstract: A golf club incorporating a stress reducing feature and a shaft connection system socket. The location and size of the stress reducing feature and the shaft connection system socket, and their relationship to one another, selectively increase deflection of the face and provide stability of the shaft connection system.

Abstract: Aspects of this invention relate to structures and methods for connecting golf club heads to shafts in a releasable and adjustable manner allowing independent adjustability of face angle, loft angle, and lie angle of a club head. Assemblies for connecting the club head and shaft may include: (a) a hosel assembly; (b) an adjustment member; and (c) a securing system for releasably and adjustably securing the hosel assembly and adjustment member to the club head. The face angle, loft angle, and lie angle may be independently adjusted by releasing the securing system and rotating the different structures or exchanging the original parts with different parts.

Abstract: A golf club head according to the present invention includes a golf club head body that has a crown portion, a sole portion, and a side portion, and has an opening surrounded by the crown portion, the sole portion, and the side portion; and a face portion that blocks the opening of the golf club head body. The face portion is shaped as cup that has a base portion shaped as a flat plate and a peripheral portion that extends from a periphery of the base portion. With respect to the face-back direction, the width of the peripheral portion on the toe side in a plan view is longer than the width of the peripheral portion on the heel side in a plan view.

Abstract: An extraction cell assembly includes a cell body, a cap assembly having a cap body and a cap insert, a bed support and a seal. The cap body is removably secured to the cell body and includes a throughbore and a peripheral wall. The cap insert includes a plunger, a peripheral flange extending outwardly from the plunger, and a recess disposed within the plunger. The flange and plunger of the cap insert are slidably received, respectively, inside the peripheral wall and throughbore of the cap body. The bed support is removably received within the recess. The seal is removably received within the throughbore. The seal forms a fluid seal between the cell body and the cap assembly when the cap assembly is secured to the cell body. A method of using the extraction cell assembly is also disclosed.

Abstract: The present invention is directed to a multi-piece golf club head having a metal hosel with adjustability features that is cast separately from a face component, sole, and crown, and then is permanently affixed to those other parts after casting is complete. The face component, sole, and crown may be composed of any suitable materials, but preferably each of the face component, the sole, and the crown are stamped from a metal material and are welded to the hosel.

Abstract: Three cylindrical concaves (reduced thickness portions) are formed in the intermediate portion between the centering so as to be spaced apart each other in the direction of the axis of the shaft inserting hole. The cylindrical concaves are formed to have an inner diameter of 11.3 mm that is larger than the inner diameter at the centering portions by removing the thickness of the hosel portion from its inner diameter of the centering portions towards outer side. The summed lengths of the bottom surfaces (peripheral surfaces) of the cylindrical concaves in the direction of the axis of the shaft inserting hole is 12 mm, thus reducing weight of the hosel portion by 3.03 g compared with conventional hosel portions. The reduced weight can be reallocated, to the sole portion. The gold thus produced in less expensive and has a reduced weight of the hosel.

Abstract: Embodiments of grooves of golf club heads and methods to manufacture grooves of golf club heads are generally described herein. Other embodiments may be described and claimed.

Abstract: In general, aspects of this invention relate to golf clubs or golf club components incorporating adjustment members that permit ready adjustability of golf club parameters and/or interchangeability of golf club components to change a golf club configuration, and methods for providing golf clubs. According to aspects of this invention, an adjustment member may be utilized to allow the adjustability of a golf club parameter to change a golf club configuration, while ensuring there is substantially no change to other club or club head variables, parameters or characteristics. According to another aspect of this invention, an adjustment member may be utilized to allow the adjustability of two golf club parameters independently to change a golf club configuration, while ensuring there is substantially no change to other club or club head variables, parameters or characteristics.

Abstract: A golf club includes: a shaft; a head mounted on the leading end of the shaft; and a shaft case having a substantially cylindrical shape and fixed to the leading end of the shaft and inserted into a hosel formed in the head, the shaft case being fixed to the head by a bolt inserted from the sole side of the head, wherein the shaft case includes a small-diameter cylindrical portion on the leading end side thereof and a key portion formed on the outer peripheral surface of the small-diameter cylindrical portion, and multiple slits having different depths and engageable with the key portion are formed in the deep portion of the inside of the hosel, whereby, by changing the slits engageable with the key portion, the insertion depth of the shaft case into the hosel can be changed.

Abstract: Embodiments of golf clubs with hosel inserts are presented herein. Other examples and related methods are also disclosed herein.

Abstract: A golf club includes a club head, and a shaft. The club head includes a hosel formed into a tubular body having a top end and a shaft insertion hole extending downwardly from the top end. The shaft includes a shaft main body and a reinforcing member. The shaft main body is formed into a tubular shape having a tip end, and an internal surface surrounding cavity therein. The reinforcing member has a specific gravity of not more than 2.0 and is fixed in the cavity of the shaft main body. The reinforcing member includes a first portion fitting the internal surface of the shaft main body. The first portion includes an uppermost edge positioned upwardly with respect to the top end of the hosel, and a lowermost edge positioned between the top end of the hosel and the tip end of the shaft main body.

Abstract: A golf club head may include a body member having a ball striking face, a crown, a toe, a heel, a sole, a back, and a hosel region located at the intersection of the ball striking face, the heel, the crown and the sole. The crown may have a relatively round rear-side edge profile, as viewed from above. The sole may have a relatively square rear-side edge profile, as viewed from below. The rear-side edge of the sole may extend rearwardly beyond the rear-side edge of the crown along at least a portion of the back, as viewed from above. Further, the heel may have an airfoil-like surface in the forward portion of the heel. A golf club including the golf club head is also provided.

Abstract: A golf club can include a universal hosel and/or hosel spacer that allows the golf club to be used with a variety of different sized club head shafts. The universal hosel can include multiple steps or ledges, and various inner diameters to accommodate different sized shafts. The spacer can be a self-expanding spacer, and can be pre-coated with epoxy. The spacer can fill in gaps within a hosel, so as to accommodate different sized shafts.

Abstract: A system for fitting golf clubs to golfers that enables an overall club length to be varied without varying the length of the golf club shaft. The system enables a greater number of combinations of club characteristics, such as shaft flex, brand, and length, to be contained within a club fitting cart and/or for a same number of combinations of club characteristics to be contained within a smaller cart.

Abstract: A golf putter with a multi-component neck providing a novel offset and shaft-attachment design is described and claimed. The club includes a head having a strike surface, a sole, and a top line. The multi-component neck includes a lower neck component and a coupling member. The coupling member is joined to a shaft. The coupling member connects the lower neck component and the shaft such that they are relatively offset. The length of the lower neck component and/or the design of the coupling member determine the distance from the club head center of gravity and the intersection of the projected longitudinal axis of the shaft with the head.

Abstract: An improved golf club shaft comprised of a flexible insert device that adds additional flexibility to said club shaft and creates one or more pivot points along said shaft. The increased flexibility of the golf club shaft enables a golfer to impart greater force on a golf ball, and also dampens or reduces the amount of vibration and/or shock otherwise imparted to the golfer when the golf club head strikes the golf ball.

Abstract: A golf club head comprising an aerodynamic hosel is disclosed herein. In one embodiment, the hosel has an upper portion and a swept transition portion which connects to the golf club head, and all points at which the swept transition portion contacts the club head are spaced rearwardly from a vertical face plane. In a further embodiment, both the upper portion and the swept transition portion comprise coaxial shaft receiving bores. In yet another embodiment, the swept transition portion of the hosel has a trailing edge that is truncated, or that has one or more surface discontinuities. In yet another embodiment, the swept transition portion has a height and a diameter, each of which is less than or equal to one inch.

Abstract: A golf club head includes a body member having a ball striking face, a crown, a toe, a heel, a sole, a rear, and a hosel region. The heel includes an airfoil-like surface shaped like the leading edge of an airfoil that extends over a majority of the length of the heel. The back may include a Kammback feature having a concavity extending from the heel-side to the toe-side of the back. The heel-side edge of the concavity may be shaped like the leading edge of an airfoil. Further, the sole may include a diffuser that extends at an angle of from approximately 10 degrees to approximately 80 degrees from a moment-of-impact trajectory direction. A hosel fairing that extends from the hosel region toward the toe may also be provided on the crown. A golf club including the golf club head is also disclosed.

Abstract: An adjustable hosel assembly allows for adjustment of shaft angle and the distance between the shaft and the club head. The adjustable hosel assembly comprises a hosel portion, a cam piece, a bolt, and a golf club head having a convex or concave surface, wherein the hosel portion can move along the surface of the cam piece, and the cam piece can move along the surface of the club head, to adjust the orientation of a shaft placed within the hosel with respect to the club head, and wherein the bolt secures the cam piece and the hosel to the golf club head.

Abstract: A golf club comprises a shaft, a club head, and a connection assembly that allows the shaft to be easily disconnected from the club head. In particular embodiments, the connection assembly includes a removable hosel sleeve that allows a shaft to be supported a desired predetermined orientation relative to the club head. In this manner, the shaft loft and/or lie angle of the club can be adjusted without resorting to traditional bending of the shaft. In another embodiment, the club head has an adjustable sole that can be adjusted upwardly and downwardly relative to the strike face of the club head, which is effective to adjust the face angle of the club head.

Abstract: A golf club head (40) with a face component (50), an aft body (70), and an aerodynamic hosel (50) is disclosed herein. The hosel (50) has one or more joints (80, 85, 87) around which pieces or segments of the hosel (50) may be rotated or pivoted to modify the way in which a shaft is oriented with respect to the club head (40) when the hosel (50) is rigidly affixed to the club head (40). The present invention may be used to modify the loft, lie, and/or face angle parameters of the golf club head.

Abstract: A golf club includes a shaft and a club head. The club head may include a ball striking face, a crown, a sole, and a hosel region. The hosel region may have a free end configured for receiving a shaft having a longitudinal axis. When the club head is in a 60 degree lie angle position, at least a portion of the free end of the hosel region may extend above the adjacent crown surface. When the club head is in a 60 degree lie angle position, the vertical distance between the horizontal projections of the outermost points of the sole and the crown may be greater than the vertical distance between the horizontal projections of the outermost points of the sole and the hosel region.

Abstract: The present invention relates to a hosel for connecting a shaft to a club head. In one aspect of the invention, the hosel comprises a body having an undercut, wherein the undercut has a maximum cross section which tapers to a minimum cross section and increases to the maximum cross section immediately adjacent the club head. The hosel further comprises a flange section below the hosel and hosel bore above the undercut, the hosel bore section having a length of at least one inch. In another aspect of the invention, the hosel tapers in diameter from a maximum to a minimum width, and has a maximized interior mold line (IML) to improve bendability and weight savings.

Abstract: Three cylindrical concaves (reduced thickness portions) are formed in the intermediate portion between the centering so as to be spaced apart each other in the direction of the axis of the shaft inserting hole. The cylindrical concaves are formed to have an inner diameter of 11.3 mm that is larger than the inner diameter at the centering portions by removing the thickness of the hosel portion from its inner diameter of the centering portions towards outer side. The summed lengths of the bottom surfaces (peripheral surfaces) of the cylindrical concaves in the direction of the axis of the shaft inserting hole is 12 mm, thus reducing weight of the hosel portion by 3.03 g compared with conventional hosel portions. The reduced weight can be reallocated, to the sole portion. The gold thus produced in less expensive and has a reduced weight of the hosel.

Abstract: Disclosed herein are embodiments of iron-type golf club heads that comprise internal features in the hosel and/or heel regions of the club head that facilitate changing the orientation of the hosel bore relative to the front face of the club head. In some exemplary embodiments, the body comprises a heel cavity in a hosel/heel portion of the club head that extends from a body cavity behind the front face into the hosel adjacent the bore. In other embodiments, the hosel bore comprises a groove or cavity extending below where a distal tip of a shaft is positioned. These internal hosel bending features can reduce the amount of material in the club head in a desired hosel/heel region to facilitate post-manufacturing bending of the club head in that region.

Abstract: Embodiments of grooves of golf club heads and methods to manufacture grooves of golf club heads are generally described herein. Other embodiments may be described and claimed.