Gas separation – With nonliquid cleaning means for separating media – Cohesive filter media cleaning
Patent
1980-05-27
1981-11-10
Lacey, David L.
Gas separation
With nonliquid cleaning means for separating media
Cohesive filter media cleaning
55468, 417197, 294 64A, B01D 4604, F04F 552
Patent
active
042996040
ABSTRACT:
An air cleaner assembly (10) which includes a mechanism (14) for inducing the flow of air through the air cleaner (10) and for backwashing a filter element (18) is disclosed. A filtering chamber (28) is defined between the interior of a housing (12) and an exterior of a tubular shaped filter element (18). The mechanism (14) includes an air inlet plenum (32) and an accumulator chamber (34). Pressurized fluid is supplied to the plenum (32) through an inlet (54). To induce the flow of particulate laden air through the filter element (18), the pressurized fluid passes through an outlet (52) from the air inlet plenum (32). A flexible wall or diaphragm (42) is moved upwardly under the influence of the pressurized fluid supplied to the air inlet plenum (32) and moves wall member (44) upwardly into sealing engagement with top wall member (48). In this position, a portion of the pressurized fluid bleeds through holes (58) into the accumulator chamber (34) to be stored therein. When pressurized fluid is no longer supplied to air inlet plenum (32), the flexible wall (42) moves downwardly and a gap is formed between the top edge of wall member (44) and top wall member (48). The accumulated pressurized air thereafter rushes from accumulator chamber (34) in a reverse direction to backwash the filter element (18).
REFERENCES:
patent: 3169038 (1965-02-01), Pendleton
patent: 3680285 (1972-08-01), Wellan et al.
patent: 3729903 (1973-05-01), Espeel et al.
patent: 3748836 (1973-07-01), Bachle
patent: 3798878 (1974-03-01), Pausch
patent: 4033732 (1977-07-01), Axelsson et al.
patent: 4073602 (1978-02-01), Cagle
patent: 4077781 (1978-03-01), Sundstrom
Donaldson & Company, Inc.
Lacey David L.
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