The present invention is direct to a set of golf clubs comprising long irons, mid-irons and short irons. The invention contemplates the use of titanium or steel for the main body portion and a tungsten weight member coupled to the toe and a tungsten heel weight member coupled in a hosel cavity.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club head includes a body portion having an interior cavity, a ledge portion extending outward from a back wall of the body portion, a filler material comprising a rubber compound in the interior cavity, a first set of mass portions that is closer to a toe portion edge of the body portion than to a heel portion edge of the body portion, and a second set of mass portions that is closer to the heel portion edge than to the toe portion edge. A face portion is coupled to the body portion to enclose the interior cavity and includes at least one back groove located proximate to a perimeter edge of the face portion. Other examples and embodiments may be described and claimed.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club head includes a body portion having a face portion with a face perimeter edge defined by a face toe edge, a face heel edge, a face top edge, and a face sole edge. The face portion includes a first groove portion, a second groove portion, a third groove portion on the back surface of the face portion, and a face perimeter portion between the first groove portion and the face toe edge, between the second groove portion and the face top edge, and between the third groove portion and the face heel edge. The first groove portion is connected to the second groove portion, which is connected to the third groove portion. Other examples and embodiments may be described and claimed.

A shaft includes a tip end and a butt end. In the shaft, a flexural rigidity at a point located 130 mm apart from the tip end is denoted by E1, a flexural rigidity at a point located 1030 mm apart from the tip end is denoted by E10, and a torsional rigidity at the point located 130 mm apart from the tip end is denoted by G1. A ratio (E10/E1) is greater than or equal to 2.4 and less than or equal to 8. The flexural rigidity E1 is less than or equal to 2.5 (kgf.Math.m.sup.2). The flexural rigidity E10 is greater than or equal to 6.0 (kgf.Math.m.sup.2). The torsional rigidity G1 is greater than or equal to 0.5 (kgf.Math.m.sup.2). A ratio (E1/G1) is greater than or equal to 1.0 and less than or equal to 4.0.

An iron-type golf club head where a ratio of a maximum toe height of the iron-type golf club head to a blade length of the iron-type golf club head is greater than zero and at most 0.62. A maximum thickness of the front portion, along the strike face, corresponds with a location toeward of a geometric center of the strike face. The thickness of the front portion, at the geometric center of the strike face, is less than the maximum thickness of the front portion. A coefficient of restitution (COR) of the iron-type golf club head is at least 0.818 and at most 0.830. An entirety of the sole is rounded along a plane parallel to the strike face, and a radius of curvature of the sole, along the plane parallel to the strike face, is no more than between, and inclusive of, 100 mm and 275 mm.

A golf club head with improved striking face is disclosed. More specifically, the present invention relates to a golf club head wherein the striking face is further comprised out of a thickened central region, located near a geometric center of the striking face portion, a central transition region extending outward radially from the thickened central region, a thinned intermediate region, extending outward radially from the central transition region, a thickened stress reducing region, extending outward radially from the thinned intermediate region, and a thinned perimeter region, extending outward radially from the thickened stress reducing region, all of which combine to form the improved striking face.

Some embodiments include hollow body club heads having reinforced club head faces. In one example, the club face comprises a reinforcement element such as a looped rib positioned on a rear surface of the club face to provide reinforcement. The club head defines a closed interior cavity, where the reinforcement is located within the closed interior cavity. The hollow body club head further comprises a rear including a plurality of walls to allow the club head to easily bend during a golf ball impact. The combination of the hollow body design and the reinforcement element reinforces the club head while permitting the club face to bend. Other embodiments of related club heads and methods are also disclosed.

A composite golf club head and a method for manufacturing the same are provided. The composite golf club head has a carbon fiber composite body and a striking face. The carbon fiber composite body is formed by multiple carbon fiber prepreg materials or multiple composite prepreg materials including carbon fiber with stacking, a positive pressure, a vacuum negative pressure, and heating. The striking face is made of a carbon fiber composite or metal material, and is fixedly glued to a front opening portion of the carbon fiber composite body. A weight of the carbon fiber composite body is reduced. Center of gravity and moment of inertia can be adjusted easily according to striking distances or feel of striking of different golf club heads for enhancing a striking performance of the composite golf club head.

A golf club head includes a rear body having a crown member coupled to a sole member, and a front body coupled to the rear body to define a substantially hollow structure. The front body includes a strike face and a surrounding frame that extends rearward from a perimeter of the strike face. At least a portion of an outer wall of the club head comprises a thermoplastic composite having a plurality of lamina layers. The plurality of lamina layers include at least a fabric reinforced thermoplastic composite layer and a filled thermoplastic layer, and the fabric reinforced thermoplastic composite layer and the filled thermoplastic layer are directly bonded to each other without an intermediate adhesive.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club heady may include a body portion having an interior cavity with a front opening, a face portion coupled to the front opening to close the interior cavity, a plurality of back groove portions on a back surface of the face portion, a mass portion coupled to the body portion, a polymer filler material in the interior cavity, and a face support portion coupled to the back surface of the face portion. Each groove portion of the plurality of back groove portions is located between the face support portion and a perimeter edge of the face portion. Other examples and embodiments may be described and claimed.