Gas separation – Plural serial basically diverse separating media – Plural stages in unitary casing
Patent
1981-04-09
1982-06-15
Prunner, Kathleen J.
Gas separation
Plural serial basically diverse separating media
Plural stages in unitary casing
55329, 55332, 55357, 55419, 55480, 55501, 55507, 55509, 55DIG31, 55DIG35, 55DIG37, B01D 5000
Patent
active
043348998
ABSTRACT:
A filter assembly for use especially with air conditioning and heating ducts, comprising first and second rectangular frames, the latter frame being detachably positioned in the first one, and a filter element sandwiched between the rear end of the second frame and a flange seat on the first frame. Interiorly separable snap lock elements on the first and second frames serve to retain the latter frame and filter element in position in the first frame. The second frame is formed into a louver or grill and includes a plurality of horizontally-spaced and inclined slats, the spacing being so as to permit ample flow of air through the assembly, the slats serving as a handle for the insertion and withdrawal of the second frame relative to the first one. The front of the assembly is formed with a rectangular molding to conceal the front edge portions, the front of the assembly extending flush with the surrounding duct wall in the assembled condition of the filter unit, the latter being of a wooden construction to enable finishing or coating of the assembly.
REFERENCES:
patent: 2019867 (1935-11-01), Nelson
patent: 2214750 (1940-09-01), Myers
patent: 2291383 (1942-07-01), Espenschied
patent: 2575499 (1951-11-01), Manow
patent: 2672206 (1954-03-01), Keist
patent: 2881854 (1959-04-01), Uehre, Jr.
patent: 2964038 (1960-12-01), Silverman
patent: 3046719 (1962-07-01), Tropiano
patent: 3252580 (1966-05-01), Getzin
patent: 3345930 (1967-10-01), Ammons
patent: 3614860 (1971-10-01), Grellsson
patent: 3968738 (1976-07-01), Matzke
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