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:
Apr. 08, 2008
Filed:
Mar. 28, 2005
Shigeru Muramatsu, Shizuoka-ken, JP;
Katsuo Ito, Shizuoka-ken, JP;
Shigeru Muramatsu, Shizuoka-ken, JP;
Katsuo Ito, Shizuoka-ken, JP;
Yamaha Corporation, Shizuoka-Ken, JP;
Abstract
A separate automatic player is independent of a piano, and stands in front of the piano for an automatic playing; the separate automatic player includes a key driver unit, a pedal driver unit and a framework on which the key driver unit and pedal driver unit is carried; the key driver unit has an array of key actuators so as to selectively depress and releases the black and white keys, and a pair of side elevators and a rotary unit is provided between the framework and the array of key actuators; the side elevators bring the plunger heads of the key actuators into contact with the upper surfaces of the black and white keys, and the rotary unit makes the plungers vertical to the upper surfaces so that the key actuators exert force on the black and white keys at the magnitude exactly equivalent to pieces of music data.