| US 7,585,235 B2 | ||
| Baseball or softball bat | ||
| Kazunori Misono, Osaka (Japan); Yutaka Yamaguchi, Osaka (Japan); and Toshiaki Kida, Osaka (Japan) | ||
| Assigned to Mizuno Corporation, Osaka (Japan) | ||
| Filed on Oct. 30, 2007, as Appl. No. 11/928,645. | ||
| Claims priority of application No. 2006-295920 (JP), filed on Oct. 31, 2006; and application No. 2007-264003 (JP), filed on Oct. 10, 2007. | ||
| Prior Publication US 2008/0161140 A1, Jul. 03, 2008 | ||
| Int. Cl. A63B 59/06 (2006.01) | ||
| U.S. Cl. 473—567 [473/566] | 8 Claims |
| 1. A baseball or softball bat, including a tip portion, a ball hitting portion, a tapered portion and a grip portion, comprising:
a cylindrical outer circumferential member constituting at least part of said ball hitting portion and at least part of the
tip portion, wherein the diameter of the outer circumferential member at the tip portion of the bat is smaller than the diameter
of the outer circumferential member at the ball hitting portion, the outer circumferential member having an inner surface
and an outer surface;
an inner circumferential member disposed proximate the inner surface of said outer circumferential member, the inner circumferential
member having a tip side end positioned opposite to a tapered side end, fixed to said outer circumferential member, the tip
side end of the inner circumferential member extending from the inner surface of the outer circumferential member to the outer
surface of the outer circumferential member, wherein the tip side end is adhered to the outer surface of the outer circumferential
member; and
a non-adhesive portion for preventing adhesion between said outer circumferential member and an unfixed portion of said inner
circumferential member other than said tip side end and including said taper side end, provided on at least a part of a region
of said inner circumferential member where said unfixed portion and said outer circumferential member are opposite to each
other.
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