Abstract: A golf club head with a face component having a variable thickness and a coating on a rear surface of the face component that provides a flat surface to which a medallion can be affixed, and methods of manufacturing such golf club heads, are disclosed herein. The coating is made from a fill material comprising a polymer and a plurality of microscopic bubbles, which preferably constitute 5-70% of the volume of the fill material. The polymer material preferably is a polyurethane having a Poisson's ratio of 0.40-0.50.

Abstract: A golf club head with at least one cavity including a weight that is co-molded with a fill material comprising a polymer and a plurality of microscopic bubbles, and methods of manufacturing such golf club heads, are disclosed herein. The plurality of microscopic bubbles constitutes at 5-70% of the volume of the fill material, and more preferably approximately 20-30% of the volume of the fill material. The polymer material preferably is a polyurethane having a Poisson's ratio of 0.40-0.50. The weight is preferably composed of a metal alloy with a density greater than 4 g/cc, such as steel or tungsten alloy.

Abstract: A golf club head comprising at least one part manufactured via a metal injection molding process, and attached to another part of the golf club head via electrical resistance welding, is disclosed herein. The present invention is also directed to a method of making said golf club head, the method comprising the steps of providing a first golf club head part made from a first metal material, metal injection molding a second golf club head part from a second, different metal material, and electrical resistance welding the second golf club head part to the first golf club head part to form a combined part.

Abstract: The present invention relates to an iron-type golf club head having a lightweight hosel and a high, toe-ward located center of gravity. The golf club head preferably includes a hollow body with a hosel and an interior mold line that extends into the hosel and is separated from a shaft bore by a solid barrier that does not include any through-holes. An upper portion of the body may include a pocket to hold a high-density weight, and the hosel wall may include multiple through-bores to further lighten the hosel. The golf club head may also include one or more internal ribs extending from the hollow interior of the body into the interior of the hosel.

Abstract: A golf club head with at least one cavity including a weight that is co-molded with a fill material comprising a polymer and a plurality of microscopic bubbles, and methods of manufacturing such golf club heads, are disclosed herein. The plurality of microscopic bubbles constitutes at 5-70% of the volume of the fill material, and more preferably approximately 20-30% of the volume of the fill material. The polymer material preferably is a polyurethane having a Poisson's ratio of 0.40-0.50. The weight is preferably composed of a metal alloy with a density greater than 4 g/cc, such as steel or tungsten alloy.

Abstract: A golf club head with at least one cavity including a fill material comprising a polymer and a plurality of microscopic bubbles, and methods of manufacturing such golf club heads, are disclosed herein. In particular, the golf club head comprises an internal cavity that is at least partially filled with the fill material, or a medallion comprising the microscopic bubble fill material. The plurality of microscopic bubbles constitutes at 5-70% of the volume of the fill material, and more preferably approximately 20-30% of the volume of the fill material. The polymer material preferably is a polyurethane having a Poisson's ratio of 0.40-0.50. In some embodiments, the fill material takes the form a medallion affixed to a rear surface of the striking face, while in others, the fill material is injected into the internal cavity.

Abstract: A golf club head with at least one cavity including a fill material comprising a polymer and a plurality of microscopic glass bubbles, and methods of manufacturing such golf club heads, are disclosed herein. In particular, the golf club head is an iron having a striking face, a rear portion, and an internal cavity disposed behind the striking face, which is at least partially filled with the fill material. The plurality of microscopic glass bubbles constitutes at 5-70% of the volume of the fill material, and more preferably approximately 20-30% of the volume of the fill material. The polymer material preferably is a polyurethane having a Poisson's ratio of 0.40-0.50. In some embodiments, the fill material takes the form a medallion affixed to a rear surface of the striking face, while in others, the fill material is injected into the internal cavity.

Abstract: A golf club head with at least one cavity including a weight that is co-molded with a fill material comprising a polymer and a plurality of microscopic bubbles, and methods of manufacturing such golf club heads, are disclosed herein. The plurality of microscopic bubbles constitutes at 5-70% of the volume of the fill material, and more preferably approximately 20-30% of the volume of the fill material. The polymer material preferably is a polyurethane having a Poisson's ratio of 0.40-0.50. The weight is preferably composed of a metal alloy with a density greater than 4 g/cc, such as steel or tungsten alloy.

Abstract: A golf club head with at least one cavity including a fill material comprising a polymer and a plurality of microscopic bubbles, and methods of manufacturing such golf club heads, are disclosed herein. In particular, the golf club head comprises an internal cavity that is at least partially filled with the fill material, or a medallion comprising the microscopic bubble fill material. The plurality of microscopic bubbles constitutes at 5-70% of the volume of the fill material, and more preferably approximately 20-30% of the volume of the fill material. The polymer material preferably is a polyurethane having a Poisson's ratio of 0.40-0.50. In some embodiments, the fill material takes the form a medallion affixed to a rear surface of the striking face, while in others, the fill material is injected into the internal cavity.

Abstract: A golf club head with at least one cavity including a fill material comprising a polymer and a plurality of microscopic glass bubbles, and methods of manufacturing such golf club heads, are disclosed herein. In particular, the golf club head is an iron having a striking face, a rear portion, and an internal cavity disposed behind the striking face, which is at least partially filled with the fill material. The plurality of microscopic glass bubbles constitutes at 5-70% of the volume of the fill material, and more preferably approximately 20-30% of the volume of the fill material. The polymer material preferably is a polyurethane having a Poisson's ratio of 0.40-0.50. In some embodiments, the fill material takes the form a medallion affixed to a rear surface of the striking face, while in others, the fill material is injected into the internal cavity.

Abstract: The present invention relates to an iron-type golf club head having a lightweight hosel and a high, toe-ward located center of gravity. The golf club head preferably includes a hollow body with a hosel and an interior mold line that extends into the hosel and is separated from a shaft bore by a solid barrier that does not include any through-holes. An upper portion of the body may include a pocket to hold a high-density weight, and the hosel wall may include multiple through-bores to further lighten the hosel. The golf club head may also include one or more internal ribs extending from the hollow interior of the body into the interior of the hosel.

Abstract: The present invention relates to an iron-type golf club head having a lightweight hosel and a high, toe-ward located center of gravity. The golf club head preferably includes a hollow body with a hosel and an interior mold line that extends into the hosel and is separated from a shaft bore by a solid barrier that does not include any through-holes. An upper portion of the body may include a pocket to hold a high-density weight, and the hosel wall may include multiple through-bores to further lighten the hosel. The golf club head may also include one or more internal ribs extending from the hollow interior of the body into the interior of the hosel.

Abstract: The present invention relates to an iron-type golf club head having a hollow body cavity, a hosel with a shaft-receiving bore that communicates with the hollow body cavity to form a continuous cavity structure, and a center of gravity located closer to the toe than to the heel. The iron-type golf club head preferably includes a face component with a striking face and a rear extending sole portion, and may also include supporting ribs within the continuous cavity structure, a hosel cutout covered by a cover made from a lower-density material than that of the hosel, and through-holes extending through a wall of the hosel.

Abstract: A golf club head comprising an adjustable weighting feature including a tube extending from the crown to the sole of the golf club head is disclosed herein. More specifically, a golf club head formed from three pieces, namely a first piece comprising a face, a crown portion, a sole portion, and a hosel, a second piece comprising a rear end, a crown portion, and a sole portion, and a tube, wherein these pieces are welded to one another, is disclosed herein. Each of these pieces may be separately cast, forged, or formed from a metal material such as stainless steel, titanium alloy, and aluminum alloy.

Abstract: A golf club head with at least one cavity including a fill material comprising a polymer and a plurality of microscopic glass bubbles, and methods of manufacturing such golf club heads, are disclosed herein. In particular, the golf club head is an iron having a striking face, a rear portion, and an internal cavity disposed behind the striking face, which is at least partially filled with the fill material. The plurality of microscopic glass bubbles constitutes at 5-70% of the volume of the fill material, and more preferably approximately 20-30% of the volume of the fill material. The polymer material preferably is a polyurethane having a Poisson's ratio of 0.40-0.50. In some embodiments, the fill material takes the form a medallion affixed to a rear surface of the striking face, while in others, the fill material is injected into the internal cavity.

Abstract: A golf club head having a thin topline and improved sound is disclosed herein. The golf club head, which preferably is a three-piece iron-type head, comprises a body with truss supports linking a lower body portion of the iron with a top portion. This configuration creates an iron with the sound and feel of a closed cavity back iron and the performance and mass properties of an open cavity back iron. The golf club head also includes a partial face cup comprising a striking face and a lower flange and a dampening element filling at least a portion of a cavity between the body and the face cup. The dampening element comprises a portion that is compressed within the cavity and another portion that is adhered to the rear surface of the striking face.

Abstract: A golf club head having a high COR at its face center and a center of gravity located at a point close to the face and the sole is disclosed herein. In particular, the golf club head comprises a hollow body including a weight lip and face component, and the weight lip extends from the sole inside the body towards the face component without making contact with the face component. The golf club head preferably is a two-piece iron-type golf club head, and each piece is heat treated differently before being welded together to further optimize center of gravity location, ball speed, and COR distribution across the face.

Abstract: A golf club head having a thin topline and improved sound is disclosed herein. The golf club head, which preferably is a three-piece iron-type head, comprises a body with truss supports linking a lower body portion of the iron with a top portion. This configuration creates an iron with the sound and feel of a closed cavity back iron and the performance and mass properties of an open cavity back iron. The golf club head also includes a partial face cup comprising a striking face and a lower flange and a dampening element filling at least a portion of a cavity between the body and the face cup.

Abstract: A golf club head comprising an adjustable weighting feature including a tube extending from the crown to the sole of the golf club head is disclosed herein. More specifically, a golf club head formed from three pieces, namely a first piece comprising a face, a crown portion, a sole portion, and a hosel, a second piece comprising a rear end, a crown portion, and a sole portion, and a tube, wherein these pieces are welded to one another, is disclosed herein. Each of these pieces may be separately cast, forged, or formed from a metal material such as stainless steel, titanium alloy, and aluminum alloy.