Method of and apparatus for controlling the inlet openings of central ventilation installations
US3990356A · kind A · utility
7Cited by
4References
29Claims
0Family size
Inventor
Key dates
| Filing date | Feb 4, 1975 |
| Grant date | Nov 9, 1976 |
| Priority date | — |
| Expiry date | Feb 4, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F11/0001
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method of and apparatus for controlling the inlet or exhaust openings of central ventilation or exhaust installations wherein air is only removed from the individual rooms or areas by means of a central exhaust ventilator when such rooms or areas are in use as well as for a certain time duration thereafter, and after expiration of such time duration the exhaust openings of the rooms or areas are automatically closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.