Abstract: 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.

Abstract: 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 taper, a handle taper, and a handle. The sleeve can slide over the handle portion and can be pressed, molded, or adhered to the barrel taper. The resilient sleeve can be sized and shaped such that the sleeve portion is substantially the same diameter as the tip end. The sleeve can comprise a material capable of impact absorption. The sleeve can have a composite structure with inner and outer sleeve components. The sleeve can further comprise a cone to taper the sleeve in the handle taper portion of the bat. The material and thickness of the sleeve and the core can be varied to meet applicable restitution requirements.

Abstract: 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.

Abstract: 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 taper, a handle taper, and a handle. The sleeve can slide over the handle portion and can be pressed, molded, or adhered to the barrel taper. The resilient sleeve can be sized and shaped such that the sleeve portion is substantially the same diameter as the tip end. The sleeve can comprise a material capable of impact absorption. The sleeve can have a composite structure with inner and outer sleeve components. The sleeve can further comprise a cone to taper the sleeve in the handle taper portion of the bat. The material and thickness of the sleeve and the core can be varied to meet applicable restitution requirements.

Abstract: A softball or baseball bat with modified restitution characteristics is provided. The bat can comprise a substantially rigid shell coupled with a single or multi-piece insert. The shell can comprise a tip end, a barrel, a handle taper, and a handle. The insert can be press-fit or adhered to the inside of the barrel of the shell. The insert can be a single or multi-piece design and can be single or multi-layered. The insert can comprise a material capable of impact absorption. Portions of the insert can be separated from the shell with a separation layer to improve restitution in certain areas of the bat. The insert can also comprise multiple layers that are separated from each other with a separation layer to improve restitution in certain areas of the bat. The material and thickness of the insert and the shell can be varied to meet applicable restitution requirements.

Abstract: A softball or baseball bat with modified restitution characteristics is provided. The bat can comprise a substantially rigid shell coupled with a single or multi-piece insert. The shell can comprise a tip end, a barrel, a handle taper, and a handle. The insert can be press-fit or adhered to the inside of the barrel of the shell. The insert can be a single or multi-piece design and can be single or multi-layered. The insert can comprise a material capable of impact absorption. Portions of the insert can be separated from the shell with a separation layer to improve restitution in certain areas of the bat. The insert can also comprise multiple layers that are separated from each other with a separation layer to improve restitution in certain areas of the bat. The material and thickness of the insert and the shell can be varied to meet applicable restitution requirements.

Abstract: A baseball or softball bat improved in repulsiveness while maintaining sufficient durability is obtained. The bat is a baseball or softball bat including a hitting portion, a tapered portion and a grip portion, and the hitting portion offers a hitting portion core as a core, an elastic body and an outer shell member. The elastic body is arranged on the outer periphery of the hitting portion core. The outer shell member is arranged on the outer periphery of the elastic body. The outer shell member includes outer shell member portions which are a plurality of portions elastically deformable independently of each other.

Abstract: A softball or baseball bat with modified restitution characteristics is provided. The bat can comprise a substantially rigid shell coupled with a single or multi-piece insert. The shell can comprise a tip end, a barrel, a handle taper, and a handle. The insert can be press-fit or adhered to the inside of the barrel of the shell. The insert can be a single or multi-piece design and can be single or multi-layered. The insert can comprise a material capable of impact absorption. Portions of the insert can be separated from the shell with a separation layer to improve restitution in certain areas of the bat. The insert can also comprise multiple layers that are separated from each other with a separation layer to improve restitution in certain areas of the bat. The material and thickness of the insert and the shell can be varied to meet applicable restitution requirements.

Abstract: 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 taper, a handle taper, and a handle. The sleeve can slide over the handle portion and can be pressed, molded, or adhered to the barrel taper. The resilient sleeve can be sized and shaped such that the sleeve portion is substantially the same diameter as the tip end. The sleeve can comprise a material capable of impact absorption. The sleeve can have a composite structure with inner and outer sleeve components. The sleeve can further comprise a cone to taper the sleeve in the handle taper portion of the bat. The material and thickness of the sleeve and the core can be varied to meet applicable restitution requirements.

Abstract: A baseball or softball bat improved in repulsiveness while maintaining sufficient durability is obtained. The bat is a baseball or softball bat including a hitting portion, a tapered portion and a grip portion, and the hitting portion offers a hitting portion core as a core, an elastic body and an outer shell member. The elastic body is arranged on the outer periphery of the hitting portion core. The outer shell member is arranged on the outer periphery of the elastic body. The outer shell member includes outer shell member portions which are a plurality of portions elastically deformable independently of each other.