| US 7,608,772 B2 | ||
| Black key for keyboard instrument and method of manufacturing a black key cover | ||
| Haruichi Kato, Hamamatsu (Japan) | ||
| Assigned to Kabushiki Kaisha Kawai Gakki Seisakusho, Shizuoka-ken (Japan) | ||
| Filed on Apr. 23, 2008, as Appl. No. 12/108,379. | ||
| Claims priority of application No. 2007-113067 (JP), filed on Apr. 23, 2007. | ||
| Prior Publication US 2008/0257132 A1, Oct. 23, 2008 | ||
| Int. Cl. G10C 3/12 (2006.01) | ||
| U.S. Cl. 84—433 [84/423 R; 84/430; 84/439; 84/440] | 12 Claims |
| 1. A black key for a keyboard instrument, comprising:
a key body in an elongate bar shape that extends in a front-rear direction and is swingable, the body lacking the visible,
black, playable part of the key that protrudes above the plane of the white keys, when installed;
a black key cover body providing the visible, black, playable part of the key that protrudes above the plane of the white
keys, the key cover body formed into a hollow shape opening downward and mounted on a front portion of an upper surface of
said key body in a manner covering the front portion; and
a weight that is received in said black key cover and adds weight to said key body,
wherein said black key cover body as a lower wall protruding inward from a lower edge portion of at least one of the left
and right side walls partially covering the said hollow shape, for holding said weight from below, said lower surface having
a lower surface bonded to said key body.
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