Whistle
US8006634B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Apr 28, 2009 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Dec 17, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K5/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An object of the present invention is to provide a whistle which has a resonance frequency shifted to the low-frequency side and a pleasant tone while retaining a compact size and light weight. In order to attain this object, a whistle comprises a mouthpiece portion, inside which an air passageway is formed and in which an air opening is opened, and a body portion, in which a connected resonance chamber that is connected to the air passageway is formed; the connected resonance chamber comprises a first resonance chamber, a second resonance chamber in which a sound-emitting opening is opened, and an orifice connecting the first resonance chamber and the second resonance chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.