A shaft for a golf club includes a first end, a second end, and a demarcation. The first end is adapted to attach to a club head. The second end is adapted to receive a grip distal to the first end. The demarcation is positioned at or adjacent to the balance point of the golf club between the first end and the second end.

A golf club has a first shaft coupled to a club head, a second shaft configured to slidably engage a portion of the first shaft, a grip coupled to the second shaft, and an adjustable length shaft assembly received by the second shaft and configured to allow a portion of the first shaft to slide in relation to the second shaft in a first configuration, and to restrict a portion of the first shaft from sliding in relation to the second shaft in a second configuration. The grip is restricted from rotation about the first shaft or the second shaft as the first shaft slides in relation to the second shaft.

A golf putter grip includes a main body with a generally rounded diamond cross sectional shape and having and integrated green reading and alignment system, wherein the integrated green reading and alignment system includes two break measurement lines, each break measurement line on one side of the grip and configured to assist the golfer in gauging the angle of the flag, and wherein the integrated green reading and alignment system includes at least two alignment lines on a top of the grip and associated with the two break measurement lines and configured to assist in adjusting a club head face of an associated putter based upon the gauged angle of the flag. A golf putter implementing the golf putter grip with a conventional shaft and head with club face is disclosed.

Embodiments of golf clubs with adjustable loft, lie, head mass and methods of manufacturing golf clubs with adjustable loft, lie, and head mass are generally described herein. Other embodiments can be described and claimed.

A putter with a putter head that has a rear hollow cavity enclosed within the putter head body to help move the center of gravity forward and a shaft axis that intersects the center of gravity of the putter head within a predetermined range is disclosed. The putter head may have a heel counterweight to move the center of the gravity of the putter head to the desired direction. The hollow cavity in the putter head may extend from a heel region to the toe region of the putter head. In some examples, the hollow cavity may comprise a plurality of hollow cavities or may be a single cavity located in the heel region or the toe region.

Disclosed are a method for manufacturing a golf putter clubhead, a golf putter clubhead, and a golf putter. The steps of the method for manufacturing the golf putter clubhead include: obtaining or preparing a clubhead body, where the clubhead body includes a clubface, the clubface includes a toe portion, a middle portion, and a heel portion, the toe portion and the heel portion are respectively located at two ends of the clubface, and the middle portion is located between the toe portion and the heel portion; performing stiffening treatment on the clubface; and performing softening treatment on the middle portion after the stiffening treatment. After stiffening treatment is performed on the entire clubhead body, the softening treatment is performed on the middle portion of the clubface, so that stiffness of the toe portion and the heel portion is greater than that of the middle portion of the clubface.

A putter assembly, configured to facilitate improved alignment by enabling the face angle of the putter to be properly aligned with the hole, including: (a) an elongated shaft; (b) a putter head; (c) a grip; (d) an image sensor, wherein the image sensor is associated with at least one of the putter head and the elongated shaft; (e) a display, wherein the display is in communication with the image sensor; and (f) an energy source, wherein the energy source is in electrical communication with the image sensor and the display.

Disclosed is a plumber's neck putter having a putter head, and a hosel. The putter head includes a heel end, a toe end opposite to the heel end, a putting face, a rear surface opposite to the putting face, a top surface, and a bottom surface. The hosel attaches the putter head to a shaft. The hosel includes a first portion, a second portion and a socket having an opening. The first portion extends upwards from the top surface of the putter head. The second portion extends from the first portion in a forward direction relative to the putting face and forms a horizontal offset that extends towards the heel end of the putter head. The opening in the socket is configured on the second portion to receive the shaft.

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 internal 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 internal structure of the cavity. A space between the insert portion and the internal 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.

A system for adjusting alignment of a golf club head includes a club shaft having a proximal end and an opposing distal end, with a hosel fitting fixedly secured to the distal end of the club shaft. A neck is rotationally coupled to the hosel fitting at a first end and a club head is coupled to the second end of the neck. The hosel fitting includes a reference line and the neck includes a series of angle index lines. The angle of the club face is adjusted by selectively aligning a singled angle index line with the reference line.