Filter unit on equipment requiring ventilation free of dust and

Details Filter unit on equipment requiring ventilation free of dust and Filter unit on equipment requiring ventilation free of dust and

1985-06-24

1987-04-21

Hart, Charles

Gas separation

Combined or convertible

Involving ash tray

55471, 55DIG29, 981153, 361384, B01D 5000

Patent

active

046593497

ABSTRACT:
A filter device on electrical switch cabinets, housings for electronic systems and like equipment to be maintained free of dust and impurities while being ventilated during operation includes a labyrinth filter disposed in a travel path of ventilating air upstream of an air intake opening of the equipment to be ventilated, the labyrinth filter having means for effecting a plurality of changes in direction of flow of the ventilating air therethrough so as to function in a manner similar to that of a mechanical labyrinth seal.

REFERENCES:
patent: 3364838 (1968-01-01), Bradley
patent: 3771293 (1973-11-01), Vest
patent: 3807148 (1974-04-01), Fike et al.
patent: 3962608 (1976-06-01), Forster et al.
patent: 4126269 (1978-11-01), Bruges
patent: 4534776 (1985-08-01), Mammel et al.
patent: 4539896 (1985-09-01), Thomas

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