Key for keyboard instrument

Details Key for keyboard instrument Key for keyboard instrument

2008-07-11

2010-10-05

Qin, Jianchun (Department: 2832)

Music

Instruments

General features

C084S243000

Reexamination Certificate

active

07807912

ABSTRACT:
A key for a keyboard instrument, which is capable of maintaining the excellent abrasion resistance and lubricity of bushing cloth for a long time period, thereby making it possible not only to stably ensure a smooth pivotal motion of the key but also to manufacture the key at lower costs. The key is mounted in a state engaged with a pin and is pivotally moved in accordance with depression thereof. The key has a key stick formed with a pin hole having left and right wall surfaces opposed to each other and opening downward, and is pivotally engaged with the pin via the pin hole. Bushing cloth sheets are made of fluorocarbon resin fibers, and are affixed to the left and right wall surfaces of the pin hole.

REFERENCES:
patent: 3507527 (1970-04-01), White
patent: 3738216 (1973-06-01), Slaats et al.
patent: 4685371 (1987-08-01), Levinson
patent: 5185490 (1993-02-01), Vandervoort
patent: 5726374 (1998-03-01), Vandervoort
patent: H09-258720 (1997-10-01), None

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