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:
Sep. 07, 1999
Filed:
Sep. 09, 1997
Applicant:
Inventor:
Inoue Satoshi, Shizuoka, JP;
Assignee:
Yamaha Corporation, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10C / ; G10D / ; G10H / ;
U.S. Cl.
CPC ...
84719 ; 84171 ; 84236 ; 84240 ;
Abstract
A keyboard musical instrument is a compromise between an upright piano and an electronic keyboard, and a hammer stopper is provided between hammer shanks and sets of strings; the hammer stopper has cushion members on a stopper rail where the hammer shanks rebound before a strike against the strings, and a pair of parallelogram crank mechanisms are connected to both end portions of the stopper rail so as to project the cushion members into and retract them from the trajectories of the hammer shanks, thereby decreasing space occupied by the cushion members.