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:
Sep. 01, 2009
Filed:
Jun. 04, 2008
Keisuke Watanabe, Hamamatsu, JP;
Keisuke Watanabe, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-Shi, JP;
Abstract
Key is pivotably supported by a key frame, and the front end of the key is normally urged upward by a pivot lever. Load member drivable by an actuator is provided rearwardly of a mass body of the pivot lever. Key switch and proximity sensor detect a pivoting position of the key responsive to depression and release operation of the key. Load control circuit performs driving control of the actuator, in accordance with the pivoting position of the key, to move the load member back and forth, to thereby cause the load member to engage (or contact) with the mass body in a depression stroke and terminates the engagement in a release stroke.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile