Mizuno Corporation

Mizuno Usa, Inc.

Michiharu Tsukamoto

Yohei Yamashita

Toshiaki Kida

Kazuhiko Shindome

Norifumi Ito

Kohei Kikuchi

Daisuke Kogawa

Kei Kato

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.

Baseball or softball bat with modified restitution characteristics

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.

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.

A ball catching tool for baseball or softball includes a thumb-stall receiving the thumb, an index-finger-stall receiving the index finger, a middle-finger-stall receiving the middle finger, a ring-finger-stall receiving the ring finger and a little-finger-stall receiving the little finger; wherein a ball catching assisting portion of at least 6.15 mm and at most 26.6 mm in height is provided on a ball catching side surface of the thumb-stall or its root portion.

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Osaka, Japan

Michiharu Tsukamoto