Intake grill for electric fan assembly
US5118252A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | May 24, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/703
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The noise of operation of a fan assembly having a fan blade which rotates in a predetermined direction upon operation of the fan assembly may be reduced by the use of an intake grill including an inner central portion, ring elements disposed in mutually spaced, concentric relation to one another about the central portion, and spirallly-extending support elements connected to the central portion and to the ring elements. The intake grill further includes mutually circumferentially-spaced finger elements connected to and projecting away from a grill mounting surface which are also connected to the outermost ring element and thereby support the interconnected ring elements, central portion, and support elements in spaced relation to the grill mounting surface. Stiffening elements may be disposed between adjacent support elements and connected to selected adajcent ones of the ring elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.