Device for cooling chemical smoke
US5331822A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1993 |
| Grant date | Jul 26, 1994 |
| Priority date | — |
| Expiry date | Feb 10, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63J5/025
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A device and method for cooling chemical smoke for creating a low lying fog effect comprises first and second chambers arranged in heat exchange relationship, the first chamber comprising an open-ended conduit adapted for maintaining a flow of chemical smoke therethrough, the second chamber adapted for receiving liquid CO.sub.2 under pressure and including vent openings for venting gases from the second chamber into the first chamber for maintaining the second chamber at ambient pressure, the liquid CO.sub.2 transforming to dry ice in situ, and a liquid CO.sub.2 supply system for connecting a source of liquid CO.sub.2 under pressure to the second chamber, whereby the chemical smoke flowing through the first chamber is cooled by the dry ice in the second chamber. Thermal sensor means sense the temperature in the second chamber and control a liquid CO.sub.2 flow control valve in the liquid CO.sub.2 supply system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.