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. 01, 1997
Filed:
Aug. 25, 1995
Hajime Hayashida, Shizuoka, JP;
Takashi Aoyagi, Shizuoka, JP;
Satoshi Inoue, Shizuoka, JP;
Ringi Nozue, Shizuoka, JP;
Kiyoshi Kawamura, Shizuoka, JP;
Shigeaki Sato, Shizuoka, JP;
Yamaha Corporation, , JP;
Abstract
An acoustic upright piano, an electronic sound system and a hammer stopper form in combination a keyboard musical instrument for generating acoustic sounds in an acoustic sound mode and electronic sounds in an electronic sound mode, and the hammer stopper has a rotatable shaft extending in a lower space under damper blocks of damper assemblies, cushion members projecting into an upper space over the damper blocks and connecting brackets provided between the rotatable shaft and the cushion members, thereby perfectly interrupting hammer motions before an impact on strings in the electronic sound mode.