Abstract: A golf club head has a clubface for striking a ball, wherein face grooves are formed by pressing a die; a metallic skin is forming on the clubface including the interior surfaces of the face grooves so that the surface roughness Ral of the interior surfaces of the face grooves becomes not more than 0.20 micrometers; the interior surface of the face grooves is masked with a masking agent; the clubface is provided with a surface roughness of more than 0.20 micrometers by blasting abrasive; and then the masking agent is removed from the face grooves.

Abstract: Embodiments of club heads with contoured back faces and methods of manufacturing the same are described herein.

Abstract: Embodiments of club heads with contoured back faces and methods of manufacturing the same are described herein.

Abstract: The present invention provides a golf club head that can hit a ball with a sufficiently large amount of backspin. The golf club head according to the present invention is an iron type golf club head made of a metal and including a flat face. A plurality of traces are formed by milling on the face. The pitch of the traces is between 0.1 mm and 1 mm.

Abstract: This invention provides a golf club head including a plurality of score lines on the face. The golf club head includes a plurality of striations formed on the face and extending from a toe side to a heel side. A depth Dp of each striation satisfies 10 ?m?Dp?40 ?m. A cross-sectional shape of each striation is an isosceles trapezoid having an upper base at the face side and a lower base at the back side of the golf club head. The upper base and lower base satisfy the upper base>the lower base. A width Pb of the bottom portion of each protrusion formed between the striations and a width Wb of the lower base satisfy Pb<Wb.

Abstract: Golf clubs and golf club heads, such as putter heads, may include a putter body and an insert forming a ball striking face and engaged with the putter body. Portions of the insert may be formed of a metal material, while portions of the insert may be formed of a polymer material. The insert may include a base portion having grooves formed therein. This base may be joined with another material to form the insert. In some arrangements, the insert may be a two-sided, reversible construction and may have different performance characteristics associated with each side of the insert. Methods for making such putter devices are also described.

Abstract: This invention provides a plurality of grooves formed on a face of the golf club head. Each of a pair of side surfaces of each of the grooves has a first surface leading to the face and a second surface leading to the first surface in the depth direction of the groove. A first angle between the first surfaces of each of said pair of the side surfaces is larger than a second angle between the second surfaces of each of the said pair of the side surfaces. Edges of the groove are rounded. A width W (mm) of the groove measured including the rounded edges, a width Ws (mm) between the grooves adjacent one another, a width Wr (mm) of the groove measured based on the 30 degrees measurement rule and a cross section area S (mm2) of the groove satisfy the following expressions; W/Ws×100?40(%), S/(Ws×0.5)×100?70(%).

Abstract: A golf club head of this invention includes a face and a plurality of striations formed on the face by milling. A pitch P in the arrangement direction of the plurality of striations satisfies 300 ?m?P?600 ?m. The surface roughness of a region in the face with the striations satisfies in the maximum height of the profile Ry, 15 ?m?Ry?0.005×P+15.7 ?m.

Abstract: A golf club head of this invention includes a face, a plurality of score line grooves formed on the face, and traces formed in the face by milling. Edges of the score line grooves are rounded with a radius of not more than 0.2 mm. A width W (mm) of the score line groove measured with the rounded edge being included, a width Ws (mm) between the score line grooves adjacent to one another, a width Wr (mm) of the score line groove measured based on the 30 degrees measurement rule and a cross section area S (mm2) of the score line grooves satisfy the flowing expressions; W/Ws×100?35(%) and S/(Wr×0.5)×100?70(%). The face in which the traces are formed has the arithmetic mean deviation of the profile (Ra) of not less than 4.00 ?m.

Abstract: A golf club head according to the present invention comprises a plurality of score lines on a face, and a stair-shaped portion comprising a plurality of steps formed on a side wall of the score line from a face side end of the side wall in a depth direction of the score line.

Abstract: A method for surface treating a golf club head, includes: (a) forming a depression unit in the golf club head, the depression unit being indented inwardly from an outer surface of the golf club head, the outer surface being divided into a working area and a non-working area, the depression unit being formed in the working area; (b) filling the depression unit with a shielding material and covering the non-working area with a covering material; and (c) sandblasting the golf club head after step (b) and removing subsequently the shielding material from the depression unit and the covering material from the non-working area so as to form the working area into sandblasted and non-sandblasted regions that differ in gloss intensity.

Abstract: The present invention is directed to a golf club head with an improved striking surface. The grooves are machined into the strike surface with tight tolerances. The grooves have sharp edges, radiused ends, and a draft angle between about 2° and 12°. The striking face is machined such that it has a uniform texture with a roughness of more than 40 Ra.

Abstract: A golf club head having a multi-material face. The golf club head has a hard, wear resistant material as the ball-impacting face surface coupled to a softer material, allowing the multi-material face to be joined to a soft body material such that the body can be bent and customized. The multi-material face allows for improved playing characteristics by allowing the club designer to use a thinner face and lighter body material while still providing improved face wear resistance and durability.

Abstract: The present invention is directed to a method of forming a golf club head with an improved striking surface. The grooves are machined into the strike surface with tight tolerances. The grooves have sharp edges, radiused ends, and a draft angle between about 2° and 12°. The striking face is machined such that it has a uniform texture with a roughness of more than 40 Ra.

Abstract: An improved face for a golf club head includes shallow and deep markings configured to provide a pleasing appearance when viewed head on, and to frame the central region of the impact surface of the face when viewed at address. Use of only shallow markings in the central region of the impact surface prevents existence of stress fractures resulting from use of deep markings in the central region. This allows for a face thinner than those incorporating conventional grooves in the central regions of their impact surfaces, resulting in both superior resistance to cracking and improved C.O.R. Specified methods of manufacture are particularly suited for making clubs incorporating these shallow and deep markings.

Abstract: A golf club head comprises a face portion whose front face forms a clubface having a clubface roll of a radius R, and the clubface is provided with a plurality of parallel grooves extending straight at an angle of not more than 10 degrees with respect to the toe-and-heel direction of the head so as to form at least one lateral zone between the parallel grooves, wherein the above-mentioned at least one lateral zone is provided with a convex curve of a radius (r) smaller than the radius R of the clubface roll.

Abstract: Embodiments of golf clubs, golf club heads, and methods of manufacture are described herein. In one embodiment, a golf club head includes a strike face having one or more grooves with edges, where one or more of the edges is unsmooth. Other embodiments are also described herein.

Abstract: The present invention is directed to a golf club head with an improved striking surface. The grooves are machined into the strike surface with tight tolerances. The face may be selectively textured to enhance certain shots that the golfer may perform. This may include providing a plurality of distinct sets of texturing and surface roughening to accommodate a plurality of different shots. The grooves may contain a plurality of portions, including a radiused or angled portion, a portion having substantially parallel walls, a portion having a v-shape, and a curved portion. The grooves may also be characterized by various dimensions, including draft angle, inclusive side wall angle, width, depth, cross-sectional area, spacing, and pitch ratio.

Abstract: A golf club head of this invention includes a face, a plurality of score line grooves formed on the face, and a plurality of striations formed on the face. The angle formed by an arrangement direction of the plurality of striations and the score line grooves is between 40 degrees and 70 degrees, inclusive, as viewed clockwise from a toe side end of the score line grooves.

Abstract: A golf club head 1 having an improved dischargeability of foreign matters such as water and mud caught in face line grooves and a sufficient frictional force with a golf ball generated when hitting the ball, the club head 1 comprising a ball hitting face 2 including a hitting surface 7 and at least one face line groove 8 formed in the hitting surface 7, wherein the hitting surface 7 includes a rough surface portion 7a having an arithmetic mean roughness Raf of 0.20 to 0.55 ?m, and the surface of the face line groove 8 has an arithmetic mean roughness Ra1 smaller than the arithmetic mean surface roughness Raf of the rough surface portion 7a, and a method for producing the club head 1.

Abstract: A new method for producing a precision-ground golf club face is presented, the golf club face possessing a hitting zone comprised of several parallel grooves ground into the surface. The hitting zone grooves each possess triangular walls, which confer a ball-gripping capability to the golf club face.

Abstract: The present invention is directed to a golf club head with an improved striking surface. The grooves are machined into the strike surface with tight tolerances. The grooves have sharp edges, radiused ends, and a draft angle between about 2° and 12°. The striking face is machined such that it has a uniform texture with a roughness of more than 40 Ra. The face may be selectively textured to enhance certain shots that the golfer may perform. This may include providing a plurality of distinct sets of texturing to accommodate a plurality of different shots. The grooves may contain a plurality of portions, including a radiused or angled portion, a portion having substantially parallel walls, a portion having a v-shape, and a curved portion. The grooves may also be characterized by various dimensions, including draft angle, inclusive side wall angle, width, depth, cross-sectional area, spacing, and pitch ratio.

Abstract: This invention provides a golf club head including a plurality of score lines on the face. The golf club head includes a plurality of striations formed on the face and extending from a toe side to a heel side. The cross-sectional shape of each of the striations is a triangle asymmetric with regard to a virtual center line in the width direction, and the smallest interior angle among three interior angles of the triangle is placed at the sole side of the golf club head. A depth D from the face to the deepest portion of each of the striation satisfies 10 ?m?D?40 ?m.

Abstract: A golf club head of this invention includes a face, a plurality of score line grooves formed on the face, and a plurality of striations formed on the face. The angle formed by an arrangement direction of the plurality of striations and the score line grooves is between 40 degrees and 70 degrees, inclusive, as viewed clockwise from a toe side end of the score line grooves.

Abstract: A golf club head having a multi-material face. The golf club head has a hard, wear resistant material as the ball-impacting face surface coupled to a softer material, allowing the multi-material face to be joined to a soft body material such that the body can be bent and customized. The multi-material face allows for improved playing characteristics by allowing the club designer to use a thinner face and lighter body material while still providing improved face wear resistance and durability.

Abstract: An iron type golf club head 2 has a toe inclination visually recognizing part and a heel inclination visually recognizing part. The toe inclination visually recognizing part, which is provided on a toe side of a face surface, can be visually recognized to be inclined to a heel side from the toe side as going to a sole side from a top side. The heel inclination visually recognizing part, which is formed on the heel side of the face surface, can be visually recognized to be inclined to the heel side from the toe side as going to the sole side from the top side. An inclination angle ?1 of the toe inclination visually recognizing part with respect to a vertical direction reference line Vk is no less than 5 degrees and no more than 15 degrees. An inclination angle ?2 of the heel inclination visually recognizing part with respect to the vertical direction reference line Vk is no less than 5 degrees and no more than 15 degrees.

Abstract: In one embodiment, a method for manufacturing a golf club head comprises forming a groove at a face of the golf club by rotating a groove forming tool about an axis of rotation at an angle substantially greater than zero degrees and substantially less than ninety degrees to the face of the golf club. Other embodiments are described herein.

Abstract: A golf putter head having a vertically curved putter face with multiple horizontal contact facets. The face has a vertical radius of curvature that is at least 2 inches and no more than 3.5 inches. The face includes a plurality of horizontal contact facets that are vertically curved to match the vertical radius of curvature. The contact facets, along with the radius of curvature, ensure that no more than two of the horizontal contact facets contact the golf ball when struck by the putter head at a speed of less than 15 miles per hour. The putter produces a horizontal linear contact, or impact, geometry that compensates for misdirection of the path of the putter head throughout the stroke of the putter head. At least one of the horizontal contact facets is located at an elevation above the center of curvature and at least one is located below.

Abstract: Embodiments of golf clubs, golf club heads, and methods of manufacture are described herein. In one embodiment, a golf club head includes a strike face having one or more grooves with edges, where one or more of the edges is unsmooth. Other embodiments are also described herein.

Abstract: This invention provides a golf club head including a plurality of score lines on the face. In the golf club head according to this invention, the score line includes a pair of side surfaces and a bottom portion having a protruding portion protruding toward the face. An angle between the side surface and the face is not less than 60 degrees. A cross-sectional area A (inch2) of the score line, a width W (inch) of the score line measured based on the 30 degrees measurement method, and a distance S (inch) between the score lines adjacent to one another satisfy A/(W+S)?0.003.

Abstract: The present invention is directed to a golf club head with an improved striding surface. The grooves are machined into the strike surface with tight tolerances. The grooves have sharp edges, radiused ends, and a draft angle between about 2° and 12°. The striking face is machined such that it has a uniform texture with a roughness of more than 40 Ra. The grooves may contain a plurality of portions, including a radiused or angled portion, a portion having substantially parallel walls, a portion having a v-shape, and a curved portion.

Abstract: A golf putter head with a front portion comprising traditional shape and appearance, with an integral face insert extending through the head to an alignment and weighting portion extending beyond the main body of the putter, adding improved alignment, increased MOI and adjustable weighting and adjustable balance and optimizable Center of Percussion. The putter head comprises a central face insert portion extending through the body and above the traditional weight flange, with mass relieved portions below the top of the alignment piece in order to receive one or more optional weights, and the upper side of the rearwardly extending portion being engraved or marked with various alignment indicia, and the whole through-head insert face portion and rearwardly extending portion being affixed to the base portion of the head at least in part with threaded fasteners.

Abstract: There is provided a golf club capable of giving a strong backspin to a golf ball. A shaft is connected to a head formed with score lines on a face surface thereof. A height from a sole face of the head or a horizontal plane flush with the sole face is formed greater than a radius of a golf ball. An upper protrusion and a lower protrusion are provided spacedly rearwardly of upper and lower portions of the head, respectively. By providing the center of gravity of the head in an upper portion than the center of the golf ball, backspin can be accelerated by a gear effect generated at the time of hitting the golf ball. Further, the height of up to the center of gravity of the head is freely adjustable.

Abstract: The present invention provides a golf club head that can hit a ball with a sufficiently large amount of backspin. The golf club head according to the present invention is an iron type golf club head made of a metal and including a flat face. A plurality of traces are formed by milling on the face. The pitch of the traces is between 0.1 mm and 1 mm.

Abstract: A wedge-type golf club having a plurality of parallel grooves offset at an angle with respect to the base of the club face. The grooves provide enhanced backspin and control on a golf ball when struck with the club face open. The grooves are beneficial for “getting the ball up” and stopping the ball on the green using an open face approach.

Abstract: The present disclosure pertains to composite articles, and in particular a composite face plate for a golf club-head, and methods for making the same. In certain embodiments, a composite face plate for a club-head is formed with a cross-sectional profile having a varying thickness. The face plate comprises a lay-up of multiple, composite prepreg plies. At least a portion of the plies comprise a plurality of elongated prepreg strips arranged in a predetermined criss-cross pattern in the lay-up. The prepreg strips create one or more areas of increased thickness where the strips overlap each other, thereby creating a desired profile for the plate. Metallic or polymer covers or cover layers can be used to define a striking surface.

Abstract: A golf putter ball striking face with a geometrically spaced groove pattern that gives the golfer improved feel, accuracy and distance control. This invention also relates to golf swing training, specifically to an apparatus that aids in learning and improving the alignment and swing for the putter.

Abstract: This invention provides a golf club head including a plurality of score lines on a face. In the golf club head according to this invention, the angle between each side surface of the score lines and the face is 48° or more. Edges of the score lines are formed to be positioned within a second virtual circle with a radius of 0.011 inches, the second virtual circle being concentric with a first virtual circle which internally touches the side surface of the score line and the face with a radius of 0.010 inches.

Abstract: This invention provides a golf club head including a plurality of score lines on a face. In the golf club head according to this invention, the angle between each side surface of the score lines and the face is 48° or more. Edges of the score lines are formed to be positioned within a second virtual circle with a radius of 0.011 inches, the second virtual circle being concentric with a first virtual circle which internally touches the side surface of the score line and the face with a radius of 0.010 inches.

Abstract: A putter-head (20) with a main body (22) having a striking face (24), a weight body (25) and an isolation layer 27 is disclosed herein. The striking face (24) has a dual milled pattern thereon. Preferably, a central area (40) has a first milled pattern and a periphery region (42) has a second milled pattern. The main body (22) is composed of a metal material, preferably a stainless steel material.

Abstract: According to this invention, there is provided a method of manufacturing a golf cub head having a plurality of score lines on the face. The method of this invention includes the first forming step of forming grooves for the score lines on the face, and the second forming step of forming notches uniformly along the longitudinal direction of the grooves by cutting into the edges of the grooves formed in the first forming step, the notches having first side surfaces leading to the face and second side surfaces leading to the first side surfaces and side surfaces of the grooves.

Abstract: The present invention is directed to a golf club head with an improved striking surface. The grooves are machined into the strike surface with tight tolerances. The grooves have sharp edges, radiused ends, and a draft angle between about 2° and 12°. The striking face is machined such that it has a uniform texture with a roughness of more than 40 Ra.

Abstract: A putter-head (20) with a main body (22) having a striking face (24), a weight body (25) and an isolation layer 27 is disclosed herein. The striking face (24) has a dual milled pattern thereon. Preferably, a central area (40) has a first milled pattern and a periphery region (42) has a second milled pattern. The main body (22) is composed of a metal material, preferably a stainless steel material.

Abstract: According to this invention, there is provided a method of manufacturing a golf cub head having a plurality of score lines on the face. The method of this invention includes the first forming step of forming grooves for the score lines on the face, and the second forming step of forming, uniformly along the longitudinal direction of the grooves by cutting into the edges of the grooves formed in the first forming step, notches having an arcuate cross-sectional shape.

Abstract: A set of iron-type golf clubs includes long irons with channel back configurations and short irons with cavity back configurations. The rear face configurations transition from channel backs through to pure cavity backs for increased performance continuum for the set. Additional design parameters for the set may also be systematically varied through the set, such as groove type and depth, loft angle, cavity volume, hitting face roughness, and sole width. At least one of the clubs of the set includes a sandwich-type construction for the hitting face having a dampening element disposed between a hitting face insert and a lightweight reinforcing core. In one embodiment, at least one club head is oversized.

Abstract: According to this invention, there is provided a method of manufacturing a golf cub head having a plurality of score lines on the face. The method of this invention includes the first forming step of forming grooves for the score lines on the face, and the second forming step of forming flat surfaces inclined with respect to the face by cutting into the edges of the grooves formed in the first forming step.

Abstract: A golf club head includes a perimeter member made of high density material and a face plate insert made of lower density material. In one embodiment, the face plate insert is formed by applying a shell member to a core member so that the shell member encases the core member. Preferably, the shell member is made by electrodepositing a nanometal having a grain size between 10 and 50 nanometers onto the core member.

Abstract: Embodiments of grooves with multiple channels and methods to manufacture grooves of a golf club head are generally described herein. Other embodiments may be described and claimed.

Abstract: The present invention is directed to a golf club head with an improved striking surface. The grooves are machined into the strike surface with tight tolerances. The grooves have sharp edges, radiused ends, and a draft angle between about 2° and 12°. The striking face is machined such that it has a uniform texture with a roughness of more than 40 Ra.

Abstract: A golf club head striking face is provided, including a plurality of grooves, wherein at least one groove has a first and second side. Each side includes a bottom, a lower section, and an upper section. The lower section is substantially planar and disposed between the bottom and the striking face. The upper section is substantially planar and disposed between the lower section and the striking face. A first draft angle is measured between the upper sections of the first and second sides, and a second draft angle is measured between the lower sections and the first and second sides, wherein the first draft angle is greater than the second draft angle. In addition, the distance between the first and second sides continuously increases from the bottom to the striking face.

Abstract: The invention relates to the use of a compound which acts as an antagonist of 5-HT at 5-HT.sub.3 receptors in the treatment of autism or another disorder originating in childhood in which there is mental retardation.