发明名称 Velocity meter for baseball bat
摘要 A baseball bat has its handle, shaped to be grasped by the hand of a user, extending on into an enlarged hitting portion that continues away from the handle. Included in that hitting portion is a velocity meter situated in a cavity that extends longitudinally inward toward the handle from the outer end. A plunger is slidably received within that cavity and is resiliently held in place. Also included is an indicator which informs as to the amount of movement of the plunger outwardly from within the cavity as a result of the swinging of the bat by the user.
申请公布号 US4267793(A) 申请公布日期 1981.05.19
申请号 US19790106699 申请日期 1979.12.26
申请人 LANE, MICHAEL D. 发明人 LANE, MICHAEL D.;VON FORELL, SR., KENNETH J.
分类号 A63B59/06;A63B69/00;(IPC1-7):A63B69/00;G01P15/02 主分类号 A63B59/06
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