Optimised tunnel ventilation device
US11655712B2 · kind B2 · utility
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9Claims
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Assignee
Inventor
Key dates
| Filing date | Feb 21, 2018 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | Feb 2, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2250/52
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A ventilation device that enhances the effective longitudinal thrust of a fan assembly installed within a tunnel or other internal space. The nozzle trailing edge (6) is tilted so that it forms an angle (13) with respect to the fan centreline (7), with the surface of the nozzle throughbore being non-cylindrical in shape. The discharged flow (5) is turned away from the surrounding surfaces by a convergent-divergent bellmouth (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.