Fume hood with sash lock
US4385551A · kind A · utility
8Cited by
8References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1980 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Sep 22, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1047
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A laboratory fume hood with at least two vertically movable sashes that are operatively coupled together by a sash lock that prevents both of the sashes from being opened at the same time. Opening of one sash automatically flips a pivoted lock into locking engagement with the other sash. Thus, one of the sashes must be closed before the other can be opened. This prevents the excessive waste of heated or cooled room air being sucked out through the fume hood.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.