Filter for avionic line replacement unit

Details Filter for avionic line replacement unit Filter for avionic line replacement unit

1993-03-16

1994-03-29

Hart, Charles

Gas separation

Combined or convertible

Involving communication receiving or transmitting apparatus

55493, 55502, 55518, B01D 4610

Patent

active

052980456

ABSTRACT:
A filter assembly for a line replaceable unit (LRU) uses a four-walled frame to define a plenum which mounts in sealing relationship with the top surface of an LRU. The frame interfaces with the LRU through a gasket and there is a gasket on a rim extending from the LRU walls on which the filter element is superimposed such that the filter element, the walls of the frame and the perforated top surface of the LRU define a plenum. When the frame is integral to or mounted to the avionic tray that supports the LRU, the filter element is mounted to the top of the frame and the hold-down cover compresses the filter element to the frame such that intervening gaskets effect a seal between the parts so that all air entering the LRU under the influence of negative pressure applied to holes in the bottom of the LRU must pass through the large area filter element. The cover is hinged so that it can be unlocked from the avionic tray and swung to a position wherein the filter element is accessible for being grasped, removed and replaced with a clean element without requiring withdrawal of the LRU from the avionic tray.

REFERENCES:
patent: 2735964 (1956-02-01), Greve et al.
patent: 4549887 (1985-10-01), Ioanxou
patent: 4889542 (1989-12-01), Hayes

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