Electronic musical instrument keyboard apparatus
US7858863B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 2008 |
| Grant date | Dec 28, 2010 |
| Priority date | — |
| Expiry date | Jul 18, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H1/346
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.