Rack for circuit boards of an electrical system
US4862320A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | May 23, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K7/1409
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a structure for positioning electronic modules of an electronic system therein, and particularly to a rack often called a card cage in which circuit boards are disposed. The rack embodying the invention incorporates a frame having four sides and a back plate. Two of the opposite sides are grilles. The frame is adapted for supporting printed circuit boards perpendicular to the grill. Thus, a fluid cooling medium, such as air, can enter the rack through one of the grilles, flow along and between the circuit boards and exit through the other grilles. The resistance to the flow of such air for cooling by the grilles is significantly greater than the boards disposed therein. Thus, the grilles permit a uniform coolant flow for each of the circuit boards in the rack. The rack has a lever assembly which remotely actuates connectors positioned in the rack to contact the circuit boards positioned therein. The lever assembly is further provided with a spring member which serves as a force-limiting device such that excessive force is not applied to the boards and to the connectors when the boards are inserted into the rack. The rack also has guiding members…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.