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. 25, 2000
Filed:
Oct. 22, 1996
Applicant:
Inventor:
Satoshi Inoue, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Shizuoka-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10C / ;
U.S. Cl.
CPC ...
84171 ; 84172 ;
Abstract
A keyboard musical instrument includes a keyboard, key action mechanisms and hammer assemblies as similar to an acoustic piano; however, strings are replaced with a beaten member so that a player practices a fingering on the keyboard without an acoustic sound; each of the hammer assemblies has a cylindrical hammer head formed of metal or synthetic rubber/synthetic resin, and no twisting moment is exerted on the hammer shank regardless of relative angular position between the hammer head and the hammer shank.