Suction hood for injurious gases
US5133691A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1991 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Jan 30, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB08B15/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A said suction hood (1) being connected to a gas extraction system (7) and preferably suspended on a movable arm system (4) permitting the suction hood (1) to be set in various positions relative to an area (2) from which the injurious gases (G) are extracted. For substantially increasing the depth of the suction hood when required, the suction hood (1) includes at least one and preferably three movably mounted wall elements (15, 16, 17) which is or are settable in a folded position or folded positions and which is or are unfoldable into a position or positions wherein it or they gives or give the suction hood (1) a fume cupboard like shape and function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.