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:
Mar. 20, 2007
Filed:
Jul. 16, 2004
Muneo Ishida, Hamamatsu, JP;
Muneo Ishida, Hamamatsu, JP;
Kabushiki Kaisha Kawai Gakki Seisakusho, Shizuoka, JP;
Abstract
A keystroke device of a piano capable of increasing an area for the adjustment of static loads applied to the tips of keys on the playing sides, wherein a first weight lever () rotating according to the movement of the keys () is installed above the keys () and near an action part () and a second weight lever () rotating according to the movement of the first weight lever () is installed above the first weight lever. Since the second weight lever () can be separated from the action part (), the degree of freedom of the shape and installation of the second weight lever () can be increased. Accordingly, the area for the adjustment of the static loads applied to the tips of the keys () on the playing sides can also be increased.