Double-Stage Air Filter.
Patent, Filed 10 Feb 86, patented 6 Jan 87,
DEPARTMENT OF THE NAVY WASHINGTON DC
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This patent discusses improved double-stage air filter of modular construction for attachment between aligned openings of a spaced double wall structure in order to supply filtered air flow to a controlled area. The filter is generally made up of casing means and combined plate and sleeve means. Both the casing means and plate means are provided with a flange means. The sleeve means is provided with a series of perforations and the plate means flange means is provided with a plurality of relatively spaced slots. The casing means flange means is affixed to the outer wall so that the casing means extends between the walls. The plate means includes ratainer means that is affixed to the inner wall so that the sleeve means is inserted in the casing means. Inner and outer filter means for cleaning and purifying an air flow are disposed about the sleeve means.
- Pumps, Filters, Pipes, Tubing, Fittings and Valves