Hammer keyboard system and chassis

Details Hammer keyboard system and chassis Hammer keyboard system and chassis

2006-10-18

2009-08-18

Qin, Jianchun (Department: 2832)

Music

Instruments

Stringed

C084S433000

Reexamination Certificate

active

07576273

ABSTRACT:
A hammer with simplified structure and reduced costs that maintains its capability as a mass body to impart a touch weight. The hammer is configured such that it is possible to fix the two mass plates to the metal base plate by means of a single rivet. Therefore, the number of places in which the rivet holes are drilled and disposed in both mass plates and the metal base plate are kept to a minimum, and it is possible to limit the lightening of the weight of both mass plates and the metal base plate by that amount. As a result, since it is possible to configure the base plates and the metal base plate with smaller dimensions while maintaining the required weight, the capability as a mass body to impart a touch weight can be maintained while preventing the enlarging of the hammer overall.

REFERENCES:
patent: 5243125 (1993-09-01), Yamaguchi
patent: 5610352 (1997-03-01), Yamaguchi
patent: 5821443 (1998-10-01), Masubushi
patent: 6191351 (2001-02-01), Niitsuma
patent: 2002/0038595 (2002-04-01), Suzuki et al.
patent: 11-175054 (1999-07-01), None
Japanese Office action; dated Nov. 20, 2007; 2 pages.

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