Whistle
US8382549B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Oct 19, 2007 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Jul 6, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K5/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
There is provided a whistle which suppresses any delay of sound to a listener and any attenuation of a sound volume, can transmit sound waves directly, can be blown with various tones, and has a large sound volume. Two kinds of whistles are stacked up and down and integrated together as a single whistle, an orifice is formed opposite to an air feeding opening to transmit sound waves directly to a listener. Moreover, an amount of air flowing into each air feeding tube of the whistle is controlled depending on an angle of putting a mouthpiece in a mouth to select a tone. A tone selecting member or an air amount adjusting flap is provided, and tone can be selected by mechanically blocking off each air feeding tube. Furthermore, an air amount adjusting flap which changes an air-feeding-path cross-sectional area of the air feeding opening, the air feeding tube, or the orifice is provided, and a sound volume can be changed by adjusting an amount of passing air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.