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:
May. 26, 2015
Filed:
Sep. 29, 2014
Yamaha Corporation, Hamamatsu-shi, Shizuoka-ken, JP;
Ichiro Osuga, Hamamatsu, JP;
Hiroshi Harimoto, Hamamatsu, JP;
YAMAHA CORPORATION, , JP;
Abstract
Reaction force generation membersare made of elastic body to be shaped like domes, respectively, so that the reaction force generation memberscan be elastically deformed by depression exerted in directions of axis lines Yw, Yb, respectively, to increase their respective reaction forces from the beginning with the increasing amount of elastic deformation to buckle after respective peaks of the reaction forces to reduce the respective reaction forces. By varying the directions of the axis lines Yw, Yb of the reaction force generation members between a white keyand a black key, the respective directions in which the reaction force generation membersare depressed at the peaks of the reaction forces are made close to the directions of the axis lines Yw, Yb of the reaction force generation members, respectively.