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:
Jul. 17, 2012
Filed:
Mar. 09, 2010
Shigeru Muramatsu, Mori-machi, JP;
Hisashi Takeyama, Hamamatsu, JP;
Shigeru Muramatsu, Mori-machi, JP;
Hisashi Takeyama, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-Shi, JP;
Abstract
A pedal device of an electronic keyboard musical instrument comprises a pedal lever swingable according to a depressing manipulation and a reaction force exerting unit for exerting on the pedal lever a reaction force of an amount which depends on an amount of the swing of the pedal lever. The reaction force exerting unit comprises, as an integral unit, a first movable member to be displaced via a thrust rod transferring the swing of the pedal lever, a first urging member which urges the first movable member in a direction to exert the reaction force on the pedal lever, a second movable member to be displaced by the first movable member after the swing of the pedal lever exceeds a predetermined amount, and a second urging member which urges the second movable member in the direction to exert the reaction force on the pedal lever. The first movable member, the second movable member, the first urging member and the second urging member are arranged coaxially around a common axis. The first movable member and the second movable member are capable of thrusting along the common axis.