The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 1989
Filed:
Jul. 24, 1987
Yoshihisa Tanaka, Tokyo, JP;
Tanaka Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A device for determining swing speed of a rotatable sporting goods implement, for example human activated sporting goods i.e. a baseball bat or a golf club, wherein practice swings are undertaken seriatim. The device is comprised of a base mounted support for a rotatable screw shaft, an adjustor that is threadedly engaged with said screw shaft to enable its segmental rotation when the screw shaft is rotated, a movable member swingingly supported to the base and connected via a spring to the adjustor, which enables determination of the maximum swing speed by the tension of the spring that connects the adjustor and the movable member, causing movement of the movable member by induced centrifugal force at the time of swinging. There is also a stopper upon which the movable member may impinge to thus produce a hitting sound.