Embodiments of a co-molded putter-type golf club head comprising a high-density chassis made of a first material and a low-density putter-type body made of a second material. The first material can be a high density metal (i.e., steel or tungsten, but not limited to). The second material can be a low density thermoplastic composite (i.e., polyphenylene sulfide (PPS), polyamide (PA), but not limited to). The chassis comprises a flow aperture, and one or more interlocking features. The putter-type body portion encases the entirety of the at least one interlocking feature. Further, the putter-type body encapsulates the chassis such that the body extends through, and completely fills the flow aperture, to interlock the body and chassis, and thus form the club head. Other embodiments may be described and claimed.

An improved golf putter head with a training insert is described. The golf putter head can comprise a base and a training mechanism. The base can comprise a crown, a sole, a face for hitting a golf ball, and an insert housing. The sole can comprise a bottom orifice. The training mechanism can comprise an insert and a roller ball. The insert can be mateable with the insert housing. The insert can at least partially form a roller ball housing. The roller ball can substantially be enclosed within the roller ball housing and extends out from the base through the roller ball housing.

Putters include a putter body having a ball striking face member made of a material having a first hardness characteristic. A cavity is defined in the putter body behind the ball striking face member, and plural openings are defined in the ball striking face member extending rearward with respect to the ball striking face member and into the cavity. A polymeric material at least partially fills the openings and the cavity, wherein the polymeric material has a second hardness characteristic that is softer than the first hardness characteristic. The ball striking face member and the polymeric material exposed in at least some of the openings provide a ball striking surface of the putter. The ball striking surface may include grooves or scorelines to affect the launch angle, spin, and/or roll of the ball during a putt. Methods for making such putter devices also are described.

A system including a computing device and camera is disclosed; the system configured for measuring three-dimensional attributes and associated performance measurements of a mechanical device. Some embodiments comprise a camera configured to capture images of the mechanical device and a computing device in communication with the camera. In some embodiments, the computing device is configured to access a first set of pixels associated with a first plurality of fiducials to calibrate a spatial resolution of the camera. A second image from the camera can be converted into a second set of pixels associated with each of the plurality of fiducials, which are attached to the mechanical device. The computing device can be further configured to compare the first and second set of pixels to determine the location of the plurality of fiducials on the mechanical device.

A putter head having an upward-facing surface portion and a diffusely reflecting area of at least 5% of a total upward-facing area, which is also has a low gloss value and preferential CIELab L* value, an alignment feature delineating a transition between a first portion of the upward-facing surface having an area of contrasting shade or color with a shade or color of a portion of the face adjacent the upward-facing surface, and a face with at least a portion adjacent the upward-facing surface having a diffusely reflecting face surface area with a low gloss value and preferential chroma value. The alignment feature may have a preferential contrasting color difference between the first portion of the upward-facing surface and a portion of the face, and preferential CIELab ΔL difference value between a portion of the face and the diffusely reflecting surface of the upward-facing surface.

A system including a computing device and camera is disclosed; the system configured for measuring three-dimensional attributes and associated performance measurements of a mechanical device. Some embodiments comprise a camera configured to capture images of the mechanical device and a computing device in communication with the camera. In some embodiments, the computing device is configured to access a first set of pixels associated with a first plurality of fiducials to calibrate a spatial resolution of the camera. A second image from the camera can be converted into a second set of pixels associated with each of the plurality of fiducials, which are attached to the mechanical device. The computing device can be further configured to compare the first and second set of pixels to determine the location of the plurality of fiducials on the mechanical device.

A golf club head having a nonmetallic crown bonded to a frame in close proximity to the face.

The present invention relates to a golf club reference system having improved performance in accurate hitting of a golf ball by providing the most ideal, accurate angle of a golf club at a starting point, by matching a lie angle and a socket angle when addressing. The golf club reference system of the present invention installed on a hosel installed on a club head having a hitting surface or a shaft having a handle formed in an upper portion and connected to the hosel in an lower portion, the reference system comprising: a fixing ring surrounding the hosel or the shaft, a fixing screw shaft protruding from the fixing ring in one direction; a fixing nut fixing the fixing screw shaft; a display part connected to the fixing ring through a bridge, and a color crosshair formed on an upper portion of the display part.

This disclosure relates to an alignment aid for a golf club. The alignment aid provides a golf club with one or more markings on or adjacent the hosel of the golf club, and can be used by the golfer to achieve a proper alignment. In particular, the alignment aid may include at least two markings, each of which can be used by the golfer to assist the golfer in achieving the proper alignment corresponding to a desired type of golf shot. As an example, the golfer may use one marking to achieve a proper alignment for a pitch shot, and the golfer may use another marking to achieve a proper alignment for a bunker shot.

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 includes a front portion. A face portion is coupled to the front portion. The face portion includes a central strike portion and a perimeter. A plurality of projections extend from the face portion to provide a ball striking surface for impacting a golf ball. Each projection is defined by a plurality of grooves intersecting one another within the face portion. The plurality of projections are each defined by an area ratio between a base portion area and a peak portion area. The area ratios of the plurality of projections decrease from the central strike portion to the perimeter of the face portion. Other examples may be described and claimed.