Turbo fan vent
US4641571A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1985 |
| Grant date | Feb 10, 1987 |
| Priority date | — |
| Expiry date | Jul 15, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F7/025
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A turbo fan vent for use on the roof of a building and having a close-louvered low profile turbine affixed to a rotary shaft which is rotationally supported by bracing and bearing means associated with a lower concentric collar. The collar is spaced inwardly of said turbine and is vertically overlapped by the turbine. The rotary shaft carries a large fan blade assembly arranged within said collar. The collar has a diameter substantially less than the side wall of the turbine whereby to create a large passageway for effective air ventilation. The turbine is freely rotatable by wind currents to rotate the exhaust fan assembly to draw air upwardly through said collar and outwardly through the passageway. The collar is adapted to be mounted onto a complementarily shaped stack adaptor affixed to the roof of a structure and communicative interiorly thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.