Filter cassette

Details Filter cassette Filter cassette

Filed on

1983-05-23

Date issued

1985-10-01

Examiner

Hart, Charles

Patent Class

Gas separation

SubClass

With nonliquid cleaning means for separating media

SubSubClass

Solid agent cleaning member movingly contacts apparatus

Other Related Categories

55503, 55510, 73 28, B01D 5000

Type

Patent

Status

active

Patent number

045443866

Description

ABSTRACT:
A filter cassette for sampling of airborne substances comprising a body section having an air flow passageway that extends through the body section from an air inlet to an air outlet. A filter medium inside the body section is disposed across the air flow passageway for capturing airborne substances flowing through the passageway. The portion of the passageway directly downstream from the filter medium has a uniform frusto-conical contour converging in the direction of flow. The air inlet comprises openings in the body section upstream from the filter medium, the openings being arranged to direct air into the air flow passageway normal to the direction of flow onto the filter medium.

REFERENCES:
patent: 2701030 (1955-02-01), Hazelton
patent: 3693410 (1972-09-01), Robrecht et al.
patent: 3957469 (1976-05-01), Nebash
patent: 3983743 (1976-10-01), Olin et al.
patent: 4178794 (1979-12-01), Jugle et al.
patent: 4233043 (1980-11-01), Catterson
patent: 4314831 (1982-02-01), Barbic
patent: 4350507 (1982-09-01), Greenough et al.
patent: 4382808 (1983-05-01), Van Wormer et al.

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