BAT FOR BASEBALL

Japanese Patent JP3919959

B2

PROBLEM TO BE SOLVED: To provide a safety bat for baseball suitable for use in softball, etc., and provide a process for production suitable for production of the same.
SOLUTION: A long-sized metallic pipe material is cut to a required length to obtain a core material 2. A grip part 3 is set at its one end side and a grip end member 6 formed as a separated body is mounted at the end of this grip part 3 and is integrated to the core material 2. The overall length of the core material 2 exclusive of the grip part 3 is inserted along the center of metal molds and is fixed to the metal molds, following which an expandable stock solution of urethane, etc. is poured into the metal molds and is expanded and solidified, by which the peripheral surface of the core material 2 is integrally coated and formed with an elastic impact part 4 having a required thickness.

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JP5254996	Game system and computer programs

Kunio Yamamoto
Yasuaki Shiroishi
Hosaka Akira
Hashimoto Martyr

JP34362598A

May 30, 2007

November 18, 1998

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DENKI KAGAKU KOGYO KABUSHIKI KAISHA

A63B69/00; A63B59/50; A63B59/54; A63B60/16; A63B60/54; A63B102/18; (IPC1-7): A63B69/00; A63B59/06

JP62106784A
JP57006668A
JP62159669A
JP2102270U
JP4147839A
JP63109018A
JP3017837U
JP60034864U
JP53031430A
JP4058963A
JP7275413A
JP1301313A

Shinji Nakayama

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