Keyboard musical instrument having keys equipped with...

Details Keyboard musical instrument having keys equipped with... Keyboard musical instrument having keys equipped with...

2007-11-20

2010-10-05

Warren, David S. (Department: 2832)

Music

Instruments

General features

C084S439000, C084S423001, C411S451100, C411S456000

Reexamination Certificate

active

07807911

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: 2117832 (1938-05-01), Wellner
patent: 2393923 (1946-01-01), August
patent: 3171321 (1965-03-01), Artur
patent: 3478641 (1969-11-01), Dohmeier
patent: 3654831 (1972-04-01), Grilli et al.
patent: 3956803 (1976-05-01), Leitner
patent: 4827609 (1989-05-01), Kawecki
patent: 5142834 (1992-09-01), Laclave et al.
patent: 5158003 (1992-10-01), Lee
patent: 5346349 (1994-09-01), Giovannetti
patent: 5368427 (1994-11-01), Pfaffinger
patent: 5468109 (1995-11-01), Ferrari et al.
patent: 5498108 (1996-03-01), Frandberg
patent: 5585582 (1996-12-01), Stanwood
patent: 5591927 (1997-01-01), Kawamura et al.
patent: 5704750 (1998-01-01), Bartos et al.
patent: 5897278 (1999-04-01), Frattarola
patent: 5897401 (1999-04-01), Fili et al.
patent: 6109578 (2000-08-01), Guthrie et al.
patent: 6116836 (2000-09-01), Long, Sr.
patent: 6119993 (2000-09-01), Youngblood et al.
patent: 6296430 (2001-10-01), Fischer
patent: 6406214 (2002-06-01), Chene
patent: 6435790 (2002-08-01), Ichikawa
patent: 6531651 (2003-03-01), Kanemitsu et al.
patent: 6540463 (2003-04-01), Ward
patent: 6568893 (2003-05-01), LeVey et al.
patent: 6575682 (2003-06-01), Dohm et al.
patent: 6676352 (2004-01-01), Chen-Chi et al.
patent: 6679646 (2004-01-01), Quardt et al.
patent: 6779232 (2004-08-01), Cerul
patent: 6935527 (2005-08-01), Brock
patent: 7067730 (2006-06-01), Inoue
patent: 2001/0036386 (2001-11-01), Chene
patent: 2003/0047061 (2003-03-01), Kugimoto et al.
patent: 2003/0077144 (2003-04-01), Perrot
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: 2005/0002753 (2005-01-01), Haas
patent: 2005/0125818 (2005-06-01), Ito et al.
patent: 2005/0211048 (2005-09-01), Fujiwara
patent: 1428764 (2003-07-01), None
patent: 2002-162960 (2002-06-01), None
patent: 2002-265793 (2002-09-01), None
patent: 2003-108113 (2003-04-01), None
patent: 2003-150148 (2003-05-01), None
patent: 2003-162279 (2003-06-01), None

Affiliated with

Also associated with

Rating

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.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4181808