Air flap for controlling flow within a conduit
US8430731B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 2007 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Jul 13, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6028
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A device for controlling an airflow in a ventilation duct, comprising a pivotable air flap, which prevents an airflow in the duct when in the closed position. A housing of an actuator for the air flap, which may pivot freely about the relevant longitudinal mid plane, is mounted in the inner duct wall. The air flap, symmetrically or approximately symmetrically curved about the longitudinal mid plane of the ventilation duct and supported under load in a stable position on the duct wall, is rigidly fixed to the driveshaft of the actuator, by an angled lever arm, with a separation, in the region of the apex line thereof. The air flap rests roughly centrally, permanently on the points of contact with the inner duct wall, which move with the position of the flap, in a self-centering manner and, in the closed position, contacts the inner duct wall along a sealed, endless peripheral sealing surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.