Fume hood air flow control
US4741257A · kind A · utility
32Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1985 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Jan 9, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D16/2013
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A control system is provided for providing a constant flow of air through a chamber, such as a fume hood, by measuring the pressure of the air outside of the hood and comparing it with the pressure of the air within the hood and adjusting the flow of air to achieve a constant pressure difference. The system is particularly applicable to fume hoods which have a sash which can be opened or closed or left in intermediate position; the present system will provide a constant air flow through the hood regardless of the sash position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.