Clean room having partially different degree of cleanliness
US4699640A · kind A · utility
51Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1986 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Jul 14, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F7/10
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A clean room is adapted to provide a plurality of clean air zones with different degrees of cleanliness. Air is passed through high efficiency particulate air filters in the ceiling of the room and withdrawn through shutters in the floor of the room. The shutters are adjustable to maintain a pressure-balanced system. The room is divided by walls and partitions to define different zones which are filtered by different classes of filters depending on the degree of cleanliness required in each zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.