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:
Mar. 05, 2013
Filed:
Mar. 15, 2011
Applicants:
Shigeru Muramatsu, Mori-machi, JP;
Hisashi Takeyama, Hamamatsu, JP;
Inventors:
Shigeru Muramatsu, Mori-machi, JP;
Hisashi Takeyama, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Hamamatsu-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10C 3/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
An upright piano type action has a wippen, a jack, a butt, a swinging shank (hammer shank), a swinging member (hammer), a catcher shank, a backcheckand a catcher. To any of the moving members, namely the butt, the swinging shank (hammer shank), the swinging member (hammer), the catcherand the catcher shank, a weightoris attached. The weightsare placed to apply loads, respectively, in a state where a key is not being depressed, in a direction opposite to a direction in which the moving members swing for hitting.