Electronic musical instrument keyboard apparatus

Details Electronic musical instrument keyboard apparatus Electronic musical instrument keyboard apparatus

2008-05-22

2010-12-28

Enad, Elvin G (Department: 2832)

Music

Instruments

General features

C084S744000, C084S433000

Reexamination Certificate

active

07858863

ABSTRACT:
Mass body unit includes a base section, an elongated member, and a mass concentrating section. The elongated member is formed by a thin sheet metal plate being bent, along its length, into a hollow cross-sectional shape such that an opening portion is defined between left and right longitudinal edges. In a section of the elongated member near a rear end of the member, the left and right longitudinal edges extend in parallel to define an outer wall portion of a U cross-sectional shape. In a section of the elongated member near a boundary position adjacent to the rear end of the member, the opening portion between the left and right longitudinal edges gradually decreases in width. Further, in a section from the boundary position to a front end, the elongated member has a hollow circular cross-sectional shape with the opening portion closed.

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