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. 04, 1989
Filed:
May. 05, 1988
Noboru Yamashita, Shizuoka, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
For preventing a fall board of a keyboard instrument from crashing against a key slip of the keyboard instrument, there is disclosed a fall board assembly comprising (a) a fall board having a boss portion and a covering plate portion extending from the boss portion and (b) a pair of rotary dampers provided between the boss portion of the fall board and side arms of the keyboard instrument, respectively, and operative to allow the fall board to move between first and second angular positions, and the keyboard is covered with the covering plate portion of the fall board in the first angular position but exposed to a player in the second angular position, wherein the rotary dampers produce a damping effect against the rotation of the fall board when the fall board rotates from the second angular position to the first angular position.