Ventilation system
US5167574A · kind A · utility
26Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1991 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Mar 4, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7839
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A ventilation system for ventilating the inside of a compartment such as the compartment of an automobile or the room of a building. The ventilation system prevents the contaminated outside air from flowing back into the inside of the compartment from an inside air outlet by magnetically attracting a mouth frame, which is composed of the inside air outlet and a peripheral edge, and a one-way valve for opening the inside air outlet only at the time of releasing the inside air of the compartment to the outside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.