Karsten Manufacturing Corporation

A golf club head includes a body having a face plate having a strike surface and an opposing interior surface, a rear end, and a sole connecting the faceplate with the rear end. The face plate, the rear end, and the sole partially define a cavity. An insert is positioned within the cavity, the insert presenting an insert surface facing the interior surface of the face plate and spaced therefrom.

A wedge-type golf club head comprises unique surface roughness structures that improve spin in wet conditions by providing a system of peaks and valleys that grip the ball and relocate water from the hitting surface. The hitting surface can be characterized by statistical measurements such as average surface roughness (Sa), skewness (Ssk), root mean square gradient (Sdq), and developed interface area (Sdr) at different wavelengths including a composite band, a milling band, and a surface band. The surface roughness structure provides increased spin retention in wet conditions, while remaining durable.

A ball striking device, such as a golf club head, has a face with a striking surface configured for striking a ball and a channel extending across a portion of the sole. The channel may be recessed from adjacent surfaces of the sole and have a depth of recession from the adjacent surfaces of the sole, wherein the channel comprises a center portion extending across a center of the sole, a heel portion extending from a heel end of the center portion toward the heel, and a toe portion extending from a toe end of the center portion toward the toe, wherein the width and the depth of the center portion of the channel are substantially constant, and wherein the depth of the channel is greater at the heel and toe portions than at the center portion.

Some embodiments of the lightweight golf clubs described herein include a thin crown, a thin sole, a mass efficient weight system, and a thin faceplate to maximize performance gains (e.g., ball travel distance, impact efficiency, and ball speed) targeted to individuals with swing speeds less than 85 mph. As will be further described below, in order to achieve a lightweight golf club head (having a thin crown, a thin sole, a mass efficient weight system, and a thin faceplate), the golf club head further comprises a crown-to-faceplate bridge and a sole-to-faceplate bridge to control the characteristic time (CT) properties of the golf club head.

The invention described herein is an iron-type golf club head having a back cavity and a multi-section back cavity insert that preserves more flexibility of the strike face and energy return to the golf ball.

A center-shafted putter comprising a shaft and a putter head, comprising a body and a hosel that has at least one linear edge to improve alignment consistency and precision. The hosel can comprise a shaft connector received by the shaft, a body connector received by the putter head, and shroud therebetween. The shroud defines a linear toe edge that can define a sight line or be used in conjunction with a sight line on the putter head for putting alignment.

Various embodiments of a golf club senor housing are described herein. The sensor housing can include a cover and a base that enclose a sensor therebetween. The sensor housing can be designed to sit on the end of a grip in a position that is non-obtrusive to the user. The sensor housing can further be configured to minimizes the impact on the center of gravity (CG) of the golf club by including mass reducing features. The sensor housing is also configured to sit lower on the grip and reduce the length that it projects outward from the grip butt end. Reducing the added length from the sensor housing creates a less-obtrusive feature.

A crossover-type putter head for a golf club has a front body formed from a high-density material and a rear body formed from a low-density material to achieve a forward center of gravity while maintaining a large mallet-style profile. The front body has a mass between 250 grams and 370 grams, and the rear body has a mass between 15 grams and 90 grams. The club head has a head depth greater than 3.45 inches and a center of gravity depth less than 0.70 inch, providing the feel and balance of a blade-style putter with the appearance and forgiveness of a mallet-style putter.