Gas separation: processes – Filtering – With cleaning of filter
Reexamination Certificate
2007-11-29
2011-11-15
Smith, Duane (Department: 1776)
Gas separation: processes
Filtering
With cleaning of filter
C055S302000, C055S341100, C055S341700, C055S484000, C055S521000
Reexamination Certificate
active
08057582
ABSTRACT:
An air cleaner is provided including a housing having a dirty air inlet, a clean air outlet, and an interior. A tubesheet is in the housing interior and has a plurality of openings. The tubesheet is oriented in one of either a generally horizontal or a generally vertical position. A plurality of panel-style filters is provided, with each filter being mounted in a respective one of the openings in the tubesheet. The air cleaner also has a plurality of blowpipes, with each blowpipe being oriented to direct a fluid pulse at a respective one of the panel-style filters at an angle that is: (i) not normal to a plane of the openings in the tubesheets; and (ii) not in line with a general direction of filtration flow through the respective panel-style filter. A method of pulse cleaning panel-style filters oriented in openings of a tubesheet is provided. The method includes directing fluid pulses at each of the panel-style filters at angle that is: (i) not normal to a plane of the openings of the tubesheet; and (ii) not in line with a general direction of filtration flow through the panel-style filters. The panel-style filters are oriented in the tubesheet, and the tubesheet is oriented in one of either a generally horizontal or a generally vertical position.
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International Search Report, mailed Jun. 9, 2008.
Donaldson & Company, Inc.
McKenzie Thomas
Merchant & Gould P.C.
Smith Duane
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