Safety cabinet
US5380244A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | May 24, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB08B2215/003
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A safety cabinet having a work area enclosed by a hood structure and including an air circulation and cleaning system. The air circulation and cleaning system includes a plurality of air ducts and passageways through which air is circulated by a blower within the cabinet. A portion of the air exiting the blower is directed through an exhaust after passing through a first filter and the remaining portion of the air exiting the blower is directed through the work area after passing through a second filter. A pressure gauge is connected between the first and second filters for measuring the pressure differential between the two filters to give an indication of the loading and efficiency of the filters. A third filter is disposed upstream of the pressure gauge to remove airborne contaminants in the air flowing to the gauge to prevent such contaminants from leaking from the gauge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.