Noise-making apparatus and method
US9420778B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Sep 30, 2014 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Feb 21, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K5/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A pneumatic engine for metering or controlling of flow of compressed gas. is disclosed. In certain embodiments, the flow may be used to sound a whistle. The engine may include a body comprising a first chamber having an exit aperture, a second chamber having an entrance aperture, and a bolt aperture connecting the first chamber to the second chamber. A bolt may be positioned within the bolt aperture and extending into the first chamber and into the second chamber. The bolt may comprise a conduit extending therewithin. The conduit may place the first chamber in fluid communication with the second chamber. The bolt may selectively travel within the body through a range of motion. The range of motion may comprise a first position wherein the bolt blocks the exit aperture and a second position wherein the bolt does not block the exit aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.