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:
Dec. 04, 2012
Filed:
Sep. 13, 2010
Toshiyuki Iwamoto, Hamamatsu, JP;
Kenichi Nishida, Hamamatsu, JP;
Toshiyuki Iwamoto, Hamamatsu, JP;
Kenichi Nishida, Hamamatsu, JP;
Yamaha Corporation, , JP;
Abstract
A leverpivots within a certain stroke range by a player's depression of the lever. A coil springis displaceable within the entire stroke range of the leverto produce a reaction force having a characteristic that the reaction force increases with an increase in the displacement. A dome-shaped rubber memberstarts being displaced at some point in the stroke of the leverto produce a reaction force having a characteristic that the rate of change in reaction force with respect to the displacement decreases in an area placed in the displacement. The characteristic is obtained by the dome-shaped rubber membercoming into contact with the leverat some point in the stroke of the leverto start being displaced by further depression of the leverto buckle at some point in the displacement of the dome-shaped rubber member