Music – Instruments – Electrical musical tone generation
Reexamination Certificate
2005-03-02
2008-03-18
Fletcher, Marlon T (Department: 2837)
Music
Instruments
Electrical musical tone generation
C084S718000, C084S719000, C084S743000, C084S744000, C084S746000
Reexamination Certificate
active
07345235
ABSTRACT:
Keys of an acoustic piano require balancers for cancellation of a part of self weight of the action units/hammers; however, the balancers are liable to be dropped off due to the aged deterioration of the wooden bars; in order to keep the balancers stable in the keys against the aged deterioration, the balancer is plastically deformed so as to bite into the wooden bar, the balancer, which is formed with thorns, is rotated so as to make the thorns bite into the wooden bar, the balancer is shaped into a configuration different from the holes so as to exert resilient force on the inner surface in a direction in parallel to the grain of wood, or the balancer is inserted into a constricted hole so as to strongly exert the resilient force on the inner surface, thereby being prevented from the dropping off from the keys.
REFERENCES:
patent: 3654831 (1972-04-01), Grilli et al.
patent: 5158003 (1992-10-01), Lee
patent: 5585582 (1996-12-01), Stanwood
patent: 5591927 (1997-01-01), Kawamura et al.
patent: 6531651 (2003-03-01), Kanemitsu et al.
patent: 7067730 (2006-06-01), Inoue
patent: 2003/0047061 (2003-03-01), Kugimoto et al.
patent: 2003/0084776 (2003-05-01), Inoue
patent: 2004/0123728 (2004-07-01), Inoue
patent: 2004/0163526 (2004-08-01), Muramatsu
patent: 2004/0221711 (2004-11-01), Kato et al.
patent: 2005/0211048 (2005-09-01), Fujiwara
patent: 2002-265793 (2002-09-01), None
patent: 2003-150148 (2003-05-01), None
patent: 2003-162279 (2003-06-01), None
Inoue Satoshi
Izutani Hitoshi
Yamashita Noboru
Fletcher Marlon T
Yamaha Corporation
LandOfFree
Keyboard musical instrument having keys equipped with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Keyboard musical instrument having keys equipped with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Keyboard musical instrument having keys equipped with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3963545