Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1998-10-20
1999-11-30
Thompson, Gregory
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
H05H 720
Patent
active
059953683
ABSTRACT:
A device for improving air flow around shelf-based circuit cards housed within a card cage is disclosed where at least one fan is located above a rear portion of the card cage to draw air from beneath a forward portion of the card cage. The device is generally rectangular, having a forward portion, a rear portion and two side portions. A plurality of spaced parallel flanges extend from one side portion to the other side portion. Each flange, in cross-section, has an inverted L-shape, with a vertical section and a horizontal section, the horizontal section extending from the vertical section towards the forward portion of the device. Preferably, the height of the vertical section is a least 1.2 times the width of the horizontal section and the distance between adjacent flanges is at least the height of the vertical section. Also, preferably, the device is shaped from a single piece of sheet metal. The device is connected beneath the card cage with the forward portion of the device connected to the front cross member of the card cage and the rear portion connected to the rear cross member of the card cage.
REFERENCES:
patent: 4750088 (1988-06-01), Frict
patent: 4860163 (1989-08-01), Sarath
patent: 5027254 (1991-06-01), Corfits et al.
patent: 5506751 (1996-04-01), Chatel
Jeakins William David
Lee Chi Keung
Nortel Networks Corporation
Thompson Gregory
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