An improved bowling ball finger grip or insert for a finger in a bowling ball comprising a tubular body adapted to be inserted into the finger hole of the bowling ball. The tubular body has an upper portion and a lower portion, with a bore having a uniform cross section formed through the tubular body that defines at least one finger opening that is located at the upper portion of the finger grip. The lower portion defines a lower wall that is thicker than an upper wall that is defined by the upper portion of the finger grip. The dimensions of the lower portion and lower wall define a base of the finger grip that fits tightly within the finger hole of the bowling ball while giving the upper portion of the finger grip or finger expansion area extra room to expand as the finger of a user swells during play.

A method for forming a golf ball with a graphene core disclosed herein. The method includes mixing a graphene masterbatch material with a polybutadiene material to form a core mixture, wherein the graphene masterbatch material comprises graphene in an amount from 0.1 to 80.0 weight percent of the graphene masterbatch material mixed with a carrier polymer in an amount from 99.9 to 20 weight percent of the graphene masterbatch material.

A method and system for determining concentricity of a multiple layer golf ball are disclosed herein. One or more images of a golf ball are generated using an X-ray source, a camera or a digital detector, and an image intensifier. An edge detection algorithm is preferably utilized. The method also includes calculating Y,Z center coordinates of the a best fit diameter or ellipse of the inner edge layer and outer edge layer of the multiple layer golf ball.

A compressible core with an RFID tag is described. The compressible core comprises an RFID integrated circuit, and an inlay material sandwiched between a top hemisphere and a bottom hemisphere. The RFID integrated circuit includes a memory that stores a unique identifier. The inlay material includes an RFID antenna electrically coupled to the RFID integrated circuit. The top hemisphere of the compressible core is separated from the bottom hemisphere of the compressible core. The inlay with the RFID antenna and the RFID integrated circuit placed between the top and bottom hemispheres. The top hemisphere, the inlay and the bottom hemisphere are joined together forming a compressible core. Additionally, the molded shell encapsulates the compressible core.

Embodiments of golf balls and methods to manufacture golf balls are generally described herein. In one example, a golf ball may include a face regions and a plurality of edge regions. Each face region may include first, second, and third triangular regions, each with a set of dimples. Other examples and embodiments may be described and claimed.

Multi-piece golf balls containing a multi-layered core structure are provided. The core structure includes a small, heavy inner core (center) having a relatively high specific gravity, an intermediate core layer, and a surrounding outer core layer. The layers of the core structure may have different hardness gradients. In one preferred embodiment, each core layer has a positive hardness gradient. The center of the core comprises a metal material such as copper, steel, brass, tungsten, titanium, aluminum, and alloys thereof. The intermediate core layer is preferably formed from a thermoset composition such as polybutadiene rubber, and the outer core layer is preferably formed from a thermoplastic composition such as an ethylene acid copolymer. The resulting ball has high resiliency and good spin control.

A portable golf ball scrubber assembly includes a housing. Each of a plurality of straps is coupled to the housing and is extendable around a pole. First and second tracks are positioned within the housing. The second track surrounds the first track. The second track has an opening to receive a golf ball. Each of a plurality of bristles is positioned within the housing to scrub the golf ball. A crank is rotatably coupled to the housing and an arm positioned in the housing engages the crank. The arm travels around the first track and the second track when the cranks is rotated.

The present invention is a modified resin for a molded article obtained by modifying an ethylene/unsaturated carboxylic acid copolymer with guanidine carbonate, wherein a melt flow rate of the ethylene/unsaturated carboxylic acid copolymer is 20 (g/10 minutes) or more and 600 (g/10 minutes) or less.

Multi-piece golf balls having a multi-layered solid core and multi-layered cover are provided.

Golf balls including at least one modified dimple group are disclosed. The modified dimple group comprises one or more modified dimples forming an axially symmetric pattern about a Correction Area Centroid located on an axis of symmetry at a latitude greater than 0°, where 0° represents the hemispherical pole and 90° represents the equator. The modified dimples can be altered, for example, by changing dimple coverage, dimple diameter, dimple depth, dimple edge angle, dimple volume, dimple cross-sectional shape, and/or dimple plan shape. Optionally, the dimples have a catenary cross-sectional shape and the modified dimples are altered by changing the shape factor and/or chord depth. Such modifications preferably produce a golf ball that flies more consistently regardless of orientation when struck than a corresponding golf ball without such modifications.