Stopper rail for silent piano
US11250820B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2021 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Mar 29, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10C5/10
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A stopper rail of a silent piano, which can make collision noise generated when a hammer shank collides against the stopper rail, blurred in the sense of pitch thereof and difficult to be recognized by the human ear, in a silent performance mode. In this mode, the stopper rail is contacted by the hammer shank of a hammer being pivotally moved to stop pivotal movement of the hammer. The stopper rail includes a rail body having a predetermined flexural rigidity allowing vibration, a first cushion provided on one surface of the hammer shank, for being contacted by the hammer shank being pivotally moved, and a vibration suppressing portion provided on an opposite surface of: the rail body to the first surface so as to apply a load to the rail body to suppress vibration of the rail body when the hammer shank contacts the rail body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.