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:
Aug. 23, 2016
Filed:
Sep. 29, 2014
Yamaha Corporation, Hamamatsu-shi, Shizuoka-ken, JP;
Ichiro Osuga, Hamamatsu, JP;
Hiroshi Harimoto, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-shi, JP;
Abstract
A keyboard apparatus has a plurality of white keys and black keys each of which pivot. The keyboard apparatus also has a plurality of reaction force generation membersandprovided for the white keys and the black keys, respectively. The reaction force generation membersandhave dome portionsand, respectively, which are thin and shaped like a dome so as to be elastically deformed by depression, and base portionsand, respectively, which are thick and are formed integrally with the dome portionsandto support the dome portionsand, the base portionsandjutting outward from respective lower end surfaces of the dome portionsand. The vertical position of the lower end of the dome portionis displaced from the vertical position of the lower end of the dome portion