Tellabs Petaluma, Inc.

Ericsson Gmbh

Tellabs Bedford, Inc.

Daniel J Calanni

Lawrence M Giacoma

David Michael Austin

Jay Henry Dorval

Jay H Dorval

A mechanical set of plates is able to simultaneously and quickly removably secure and remove one or more printed circuit boards (PCBs) in an enclosure in one single motion, and act as a heat sink to conduct heat away from the PCBs. The PCBs are removably secured through a clamping mechanism that may be a screw type or cam lever action by clamping down on the exposed card edges, thus allowing thermal transfer to begin on all cards. The apparatus may be used with any enclosure requiring thermal transfer from PCBs to the enclosure, including cages and enclosures that may or may not use forced airflow (fans or blowers) for heat dissipation.

Multiple printed circuit board heat transfer guide plates

A cabinet which utilizes an air-to-air heat exchanger to remove heat generated from within the cabinet prevents water and dust from entering the air-to-air heat exchanger by forcing cooler external air up along a first side wall, through the air-to-air heat exchanger, and down along a second side wall.

Cabinet with an environmentally-sealed air-to-air heat exchanger

The efficiency of a heat exchanger is significantly improved by connecting walls to an air flow structure, which has first grooves formed in the top surface of the structure and second grooves formed in the bottom surface of the structure, that block off alternating ends of the first and second grooves such that a first air source can only flow through the first grooves and a second air source can only flow through the second grooves.

Heat exchanger with increased heat transfer efficiency and a low-cost method of forming the heat exchanger

An improved inserter/ejector device is disclosed for the insertion or removal of printed circuit boards (PCBs), particularly in environments in which many such boards are to be located in close proximity. In such environments, it is often difficult, if not impossible, to reach between boards so that one may be inserted or removed without damaging others. The inserter/ejector provides various improvements over the prior art, for example, the PCB may attached on either side of a mounting portion using a threaded boss, and the device implements a lockable lever arm to ensure that the PCB is not accidentally removed. The present invention also features a guide pin which, when mated to a corresponding hole in a host system chassis, serves to positively locate the PCB relative to the host system chassis for proper insertion. The inserter/ejector further includes a label area molded into the lever arm for clearly identifying the attached PCB.

Growing community of inventors

Plano, TX, United States of America

Daniel J Calanni