Invertible back flow damper for an air moving device
US6688965B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2002 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Nov 27, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/20718
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An air moving system such as a fan or blower system includes a back flow damper that functions in two orientations; non-inverted and inverted. First and second “end” baffles are pivotally attached at opposite ends of the damper, and three “middle” baffles are pivotally attached between the two end baffles. When the air moving system fails in the non-inverted orientation, the first end baffle and the three middle baffles are gravity operated to close off the air outlet to prevent the back flow of air, and the second end baffle pivots away from the outlet. When the air moving device fails in the inverted orientation, the second end baffle and the three middle baffles operate to close off the air outlet, and the first end baffle pivots away from the outlet. The three middle baffles are pivotally coupled to a connecting rod, which prevents the inadvertent jamming of baffles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.