Back check for piano

Details Back check for piano Back check for piano

2007-01-30

2007-01-30

Lockett, Kimberly (Department: 2837)

Music

Instruments

Stringed

Reexamination Certificate

active

10849028

ABSTRACT:
A back check for a piano is provided for locking a returning hammer in a pivotal movement without fail and for saving the manufacturing cost. The back check is used for locking the hammer in a pivotal movement for returning after it has struck a string to prevent the hammer from rebounding. A back check, disposed at a location at which the hammer is locked, extends in a vertical direction, and has an adhering surface which rises in a central portion thereof in the vertical direction. An under felt is adhered on the adhering surface of the back check body. A sheet-like cushion material, which is adhered to the back check body to cover the under felt, is formed with a locking surface in a predetermined curved shape conformal to the adhering surface for locking the hammer.

REFERENCES:
patent: 2502107 (1950-03-01), Stein
patent: 2917962 (1959-12-01), Ballet
patent: 2003-36073 (2003-02-01), None

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