According to one aspect of the present invention there is provided an adjustable connector including at least two parts, each having a main body with a bore having a longitudinal axis therein, wherein an external surface of the main body of a first part is configured to bear against an internal surface of the bore of a second part when the first part is at least partially inserted into the bore of the second part to form a connection, characterized in that the positioning of the bores with respect to the main bodies is such that when the parts are connected to each other, rotation of one part with respect to the other changes the inclination of the longitudinal axes of the bores with respect to one another.

Method for coupling a sensor to a piece of equipment, such as a golf club, baseball bat, or tennis racket, that ensures that the sensor is in a known position and orientation relative to the equipment. Compensates and calibrates for degrees of freedom introduced in manufacturing and installation. The method may include manufacturing a sensor receiver that aligns with equipment in a fixed orientation, and that holds a sensor housing in a fixed orientation relative to the receiver. Remaining uncertainties in sensor position and orientation may be addressed using post-installation calibration. Calibration may include performing specific calibration movements with the equipment and analyzing the sensor data collected during these calibration movements.

A length adjustable golf club includes a club head attached to a shaft at a lower end. A length adjusting kit includes a shaft insert that attaches to the shaft at an upper end. The shaft insert includes a coupling port that accepts one of an extension block or a grip adapter. To provide length adjustments of the overall club length, one or more extension blocks may attached between the shaft insert and the grip adapter. A grip assembly having a reinforcing sleeve connects to the grip adapter and extends over the shaft and any extension blocks. The grip assembly couples to the shaft through a grip adapter and grip coupling. The grip adapter and grip coupling are axially moveable prior to securement with a retaining fastener. The grip coupling may be rotationally constrained or rotationally adjustable relative to the grip adapter.

A length adjustable golf club includes a club head attached to a shaft at a lower end. A length adjusting kit includes a shaft insert that attaches to the shaft at an upper end. The shaft insert includes a coupling port that accepts one of an extension block or a grip adapter. To provide length adjustments of the overall club length, one or more extension blocks may attached between the shaft insert and the grip adapter. A grip assembly having a reinforcing sleeve connects to the grip adapter and extends over the shaft and any extension blocks. The grip assembly couples to the shaft through a grip adapter and grip coupling. The grip adapter and grip coupling are axially moveable prior to securement with a retaining fastener. The grip coupling may be rotationally constrained or rotationally adjustable relative to the grip adapter.

A flexible tubular golf club grip is formed of elastomeric material having a substantially closed end with an end cap. The tubular portion is formed of substantially softer material than the end cap and has disposed on opposite sides axially spaced discrete areas of macro-texture having spaced raised portions giving a quilt-like appearance. The discrete areas of macro-texture are disposed peripherally spaced on opposite sides of the grip. The end cap has an extension which closely inter-fits the inner periphery of the tubular portion and provides support therefor proximate the substantially closed end. The cap extension has axially extending protrusions peripherally spaced on the top and bottom of the cap which are flush with the outer surface of the tubular portion.

A flexible tubular golf club grip is formed of elastomeric material having a substantially closed end with an end cap. The tubular portion is formed of substantially softer material than the end cap and has disposed on opposite sides axially spaced discrete areas of macro-texture having spaced raised portions giving a quilt-like appearance. The discrete areas of macro-texture are disposed peripherally spaced on opposite sides of the grip. The end cap has an extension which closely inter-fits the inner periphery of the tubular portion and provides support therefor proximate the substantially closed end. The cap extension has axially extending protrusions peripherally spaced on the top and bottom of the cap which are flush with the outer surface of the tubular portion.

The disclosure herein includes a grip and a method of making a grip configured to be grasped by a user. The grip can include a tube with a raised portion that is configured to form a portion of the surface to be grasped by the user. The grip can further include a gripping member that can be coupled to the tube leaving a portion of the raised portion exposed such that the surface to be grasped by the user includes both the raised portion and the gripping member.

The disclosure herein includes a grip and a method of making a grip configured to be grasped by a user. The grip can include a tube with a raised portion that is configured to form a portion of the surface to be grasped by the user. The grip can further include a gripping member that can be coupled to the tube leaving a portion of the raised portion exposed such that the surface to be grasped by the user includes both the raised portion and the gripping member.

A golf club has within the grip a main device, a connector, a wireless module, an antenna, a light emitting element, and an optical fiber. The main device is a device that includes a sensor such as a motion sensor, a circuit such as a CPU, and a battery. The light emitting element is an indicating means that emits light in accordance with the state of a component mounted in the golf club. The light emitted by the light emitting element is guided to the grip end by the optical fiber and emitted to the outside of the grip via the grip end.

A novelty golf club in the form of a putter is disclosed. A conventional putter is adapted to include a battery assembly disposed in the grip end of a club shaft. The battery assembly includes a set of batteries arranged end to end. A pair of terminals are configured at the battery assembly adjacent a first coupling element. A powered accessory has a second coupling element which cooperates with the first coupling element to releasably secure the powered accessory to the battery assembly. A variety of powered accessories, such as a fan assembly, a mixer assembly, a string trimmer assembly, a vibrating massager, a flashlight, and a charging unit are configured for the novelty golf club.