Abstract: An iron-type golf club head is disclosed having a first piece including a portion of an iron-type face. A second piece including a heel portion, a sole portion, a toe portion, a top-line portion, a hinge region, and a front opening for receiving the first piece is also disclosed. A first contact surface of the first piece is connected with a second contact surface of the second piece at a contact interface. A continuous weld extends along the contact interface attaching the first and second pieces together at the contact interface. The continuous weld includes a fusion zone occurring substantially on the iron-type face outside the hinge region of the club head.

Abstract: Embodiments of a putter-type golf club head with an increased moment of inertia about the X axis (MOIxx) and an increased moment of inertia about the Z axis (MOIzz) are disclosed. Generally, the MOIzz is increased by designing the putter such that the center of gravity (CG) of the putter head is located at or behind the geometric center of the putter head. Additionally, the mass of the putter head is concentrated at the outer edges of the putter head. To accomplish this, the ratio of the width of the front of the putter head to the width of the rear of the putter head is no greater than 0.55:1. The MOIxx is further increased by locating the CG relatively close to the bottom of the putter head.

Abstract: An adjustable length golf club including an engaging mechanism, a rotational shaft, a locking mechanism, and a lower shaft. The rotational shaft is connected with the engaging mechanism and is configured to rotate upon movement by the engaging mechanism. The locking mechanism is connected with the rotational shaft and includes a locking insert and a locking collar located on the locking insert. The locking insert being is configured to retain the locking collar during axial movement. The lower shaft has an inner surface that is in frictional contact with the locking collar. The locking insert is threadingly engaged with the locking collar and a first rotational movement in a first rotational direction by the rotational shaft causes the locking insert to move the locking collar creating a frictional locking engagement between the locking collar and the inner surface of the lower shaft.

Abstract: A golf club head is provided having a club body having a front portion, a rear portion, a toe portion, and a heel portion. The club head also having a central portion connected with the front portion. A frame is connected with the central portion configured to provide a lightweight crown portion being located above an offset plane.

Abstract: Embodiments of a putter-type golf club head with an increased moment of inertia about the X axis (MOIxx) and an increased moment of inertia about the Z axis (MOIzz) are disclosed. Generally, the MOIzz is increased by designing the putter such that the center of gravity (CG) of the putter head is located at or behind the geometric center of the putter head. Additionally, the mass of the putter head is concentrated at the outer edges of the putter head. To accomplish this, the ratio of the width of the front of the putter head to the width of the rear of the putter head is no greater than 0.55:1. The MOIxx is further increased by locating the CG relatively close to the bottom of the putter head.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface, a first rear surface region and a second rear surface region. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: Embodiments of a putter-type golf club head with an increased moment of inertia about the X axis (MOIXX) and an increased moment of inertia about the Z axis (MOIZZ) are disclosed. Generally, the MOIZZ is increased by designing the putter such that the center of gravity (CG) of the putter head is located at or behind the geometric center of the putter head. Additionally, the mass of the putter head is concentrated at the outer edges of the putter head. To accomplish this, the ratio of the width of the front of the putter head to the width of the rear of the putter head is no greater than 0.55:1. The MOIXX is further increased by locating the CG relatively close to the bottom of the putter head.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface, a first rear surface region and a second rear surface region. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: Embodiments of a putter-type golf club head with an increased moment of inertia about the X axis (MOIXX) and an increased moment of inertia about the Z axis (MOIZZ) are disclosed. Generally, the MOIZZ is increased by designing the putter such that the center of gravity (CG) of the putter head is located at or behind the geometric center of the putter head. Additionally, the mass of the putter head is concentrated at the outer edges of the putter head. To accomplish this, the ratio of the width of the front of the putter head to the width of the rear of the putter head is no greater than 0.55:1. The MOIXX is further increased by locating the CG relatively close to the bottom of the putter head.

Abstract: Embodiments of a putter-type golf club head with an increased moment of inertia about the X axis (MOIxx) and an increased moment of inertia about the Z axis (MOIzz) are disclosed. Generally, the MOIzz is increased by designing the putter such that the center of gravity (CG) of the putter head is located at or behind the geometric center of the putter head. Additionally, the mass of the putter head is concentrated at the outer edges of the putter head. To accomplish this, the ratio of the width of the front of the putter head to the width of the rear of the putter head is no greater than 0.55:1. The MOIxx is further increased by locating the CG relatively close to the bottom of the putter head.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface and a rear surface. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: Golf club irons having improved forgiveness, playability and performance characteristics are disclosed. The embodiments set forth parameters of various irons that affect performance either alone or in combination with other parameters when the irons are utilized to strike a golf ball. The parameters, which in some cases may be systematically progressed or varied, include golf club shaft length, striking face area, loft, coefficient of restitution, face thickness, topline thickness, swing weight, sole width at the heel and toe, and other performance characteristics.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface, a first rear surface region and a second rear surface region. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: An iron-type golf club head is disclosed including a main body including a heel portion, a sole portion, a toe portion, a top-line portion, a front portion, a rear portion, and a striking face. The main body has a recessed region including a relief region in the front portion. A replaceable striking plate is inserted into the recessed region and the relief region. The replaceable striking plate includes a front surface and a rear surface. A threaded opening is located on the rear surface of the replaceable striking plate and receives a fastener to retain the replaceable striking plate on the front portion of the main body and within the recessed region and relief region.

Abstract: An iron-type golf club head is disclosed having a first piece including a portion of an iron-type face. A second piece including a heel portion, a sole portion, a toe portion, a top-line portion, a hinge region, and a front opening for receiving the first piece is also disclosed. A first contact surface of the first piece is connected with a second contact surface of the second piece at a contact interface. A continuous weld extends along the contact interface attaching the first and second pieces together at the contact interface. The continuous weld includes a fusion zone occurring substantially on the iron-type face outside the hinge region of the club head.

Abstract: A golf club head is provided having a club body having a front portion, a rear portion, a toe portion, and a heel portion. The club head also having a central portion connected with the front portion. A frame is connected with the central portion configured to provide a lightweight crown portion being located above an offset plane.

Abstract: Embodiments of an iron type golf club head that defines a heel-portion, a mid-portion, and a toe-portion are disclosed. A mass of the heel-portion exceeds 35% of a combined mass of the heel-portion, mid-portion, and toe-portion. The heel-portion includes an opening to receive a weight insert located within a mass pad to provide heel biased weighting. The head further includes an undercut region in the toe-portion.