A softball or baseball bat with modified restitution characteristic is provided. The bat can comprise a substantially rigid core coupled with a single or multi-piece sleeve. The core can comprise a tip end, a barrel portion, a handle taper, and a handle. A sleeve assembly can be disposed over the barrel portion, and the sleeve assembly can comprise one or more materials capable of impact absorption. The sleeve assembly can include a ring portion positioned about a circumference of the barrel portion, an outer sleeve, and an inner sleeve disposed between the outer sleeve and the barrel portion.

A softball or baseball bat with modified restitution characteristic is provided. The bat can comprise a substantially rigid core coupled with a single or multi-piece sleeve. The core can comprise a tip end, a barrel portion, a handle taper, and a handle. A sleeve assembly can be disposed over the barrel portion, and the sleeve assembly can comprise one or more materials capable of impact absorption. The sleeve assembly can include a ring portion positioned about a circumference of the barrel portion, an outer sleeve, and an inner sleeve disposed between the outer sleeve and the barrel portion.

An endcap assembly for a bat may include a body across an open end of a bat barrel and a core received by the body. In one implementation, the body and the core may be retained relative to one another by a bayonet connector radially spaced from interior sides of the bat barrel by at least 0.3 inch. In one implementation, the body may include a cup having a mouth and receiving the core. In one implementation, the cup is to be radially spaced from interior sides of the bat barrel by at least 0.3 inch. In one implementation, the mouth is axially recessed. In one implementation, the cup and the core are joined by a bayonet connector having a U-shaped slot facing away from a mouth of the cup.

An endcap assembly for a bat may include a body across an open end of a bat barrel and a core received by the body. In one implementation, the body and the core may be retained relative to one another by a bayonet connector radially spaced from interior sides of the bat barrel by at least 0.3 inch. In one implementation, the body may include a cup having a mouth and receiving the core. In one implementation, the cup is to be radially spaced from interior sides of the bat barrel by at least 0.3 inch. In one implementation, the mouth is axially recessed. In one implementation, the cup and the core are joined by a bayonet connector having a U-shaped slot facing away from a mouth of the cup.

Footwear, sports equipment, weapons, gloves, vehicle controls, floor surfaces, and vehicle tires three dimensionally imprinted with friction ridge patterns derived from individuals.

A training weight for a sport stick is provided. The sport stick includes a housing having a sidewall, a proximal end wall and a distal end wall. The sidewall and proximal end wall include an opening and slot which are sized to accept a sport stick's handle and knob. Preferably, the training weight includes a cup which is biased by a spring to force the sport stick's knob to engage and lock to the training weight's proximal end wall. The training weight may include a cam mechanism to permit the retraction and extension of the spring and cup.

A handle grip can be used as a training aid in conjunction with a swinging implement, such as a baseball bat. The handle grip can be a single member that can provide a modified handle for gripping the swinging implement. The handle grip can have an inner surface cross-section that generally conforms in shape to a cross-section of a handle of the swinging implement. The handle grip can have an outer surface cross-section that approximates an oval or ellipsoid cross-section that can dictate an advantageous knuckle alignment on the grip. When used in conjunction with the swinging implement, such as a baseball bat, the handle grip can dictate a handling technique where the swinging implement handle with the modified grip can be held predominantly in a user's fingers rather than deep in a user's palms.

A handle grip can be used as a training aid in conjunction with a swinging implement, such as a baseball bat. The handle grip can be a single member that can provide a modified handle for gripping the swinging implement. The handle grip can have an inner surface cross-section that generally conforms in shape to a cross-section of a handle of the swinging implement. The handle grip can have an outer surface cross-section that approximates an oval or ellipsoid cross-section that can dictate an advantageous knuckle alignment on the grip. When used in conjunction with the swinging implement, such as a baseball bat, the handle grip can dictate a handling technique where the swinging implement handle with the modified grip can be held predominantly in a user's fingers rather than deep in a user's palms.

A ball bat may include a barrel wall formed at least in part by a plurality of concentric first composite laminate layers and a plurality of second composite laminate layers oriented transverse to the first composite laminate layers. In some embodiments, a ball bat may include composite material with a plurality of fibers oriented along a direction transverse to the longitudinal axis of the bat.

A ball bat may include a barrel wall formed at least in part by a plurality of concentric first composite laminate layers and a plurality of second composite laminate layers oriented transverse to the first composite laminate layers. In some embodiments, a ball bat may include composite material with a plurality of fibers oriented along a direction transverse to the longitudinal axis of the bat.