Air filtration system
AssigneeA. J. Dralle, Inc.
InventorJames R. Dralle
Life of this patent
Estimating the term…
Abstract
An air filtration system includes a holding frame supported by a universal mounting frame and a cartridge in the holding frame. The holding frame has a header used to permanently mount and seal the holding frame to the universal frame. The filtration cartridge fits inside the holding frame and is easily replaceable. A seal is provided between the holding frame and cartridge to assure that air passing through the system passes through the cartridge. In a preferred embodiment, the seal is provided on a flange at the back of the holding frame and another seal is provided on a cover that holds the cartridge into the holding frame.
Claims28
A system for filtering air comprising:
- a) a plurality of mounting frames arranged to support a bank of filtration units;
- b) a holding frame in the form of a rectangular box with four side walls in each mounting frame, the holding frame having a header for engaging the mounting frame, the holding frames each being sealed with respect to the mounting frames to prevent air from passing between the mounting frames and the holding frames;
- c) a replaceable filtration cartridge within each holding frame and containing filtration media, the media being sealed within the filtration cartridge so as to assure that air passing through the cartridge is filtered by said media, the cartridge having four side walls;
- d) a seal between each cartridge and its respective holding frame to prevent air from passing between the holding frames and the cartridges;
- and
- e) spacers between at least two of the side walls of the holding frame and the respective side walls of the cartridge.
A holding frame and removable filter cartridge combination for use in filtering air, the combination comprising:
- a) a box-shaped holding frame having four side walls, a header attached to the side walls at the front of the box, spacers on the inside of at least two opposite sidewalls and an inwardly projecting flange on the rear of the box;
- b) a filter cartridge slidably fit within the holding frame, the cartridge comprising four side walls slightly smaller in outside dimension than the inside dimension of the side walls, including said spacers, of the holding frame, and filtration media sealed within the side walls of the cartridge so as to assure that air passing through the cartridge is filtered by said media, a back side of the cartridge bearing against the inwardly projecting flange of the holding frame;
- c) a cover plate releasably secured to the header for holding the cartridge inside said holding frame;
- and
- d) a seal to prevent air from passing between the cartridge and the holding frame.
A filter holding frame for use with a replaceable filter cartridge comprising:
- a four side walls forming a rectangular box with an open front face for receiving a filter cartridge with spacers on at least two of the side walls of the holding frame for use in centering a filter cartridge placed in the holding frame;
- b) a header attached to the side walls for securing the holding frame to a support structure;
- and
- c) an inwardly projecting flange at the rear of the box for abutting the filter cartridge when placed therein.
A filtration cartridge for use in a filter holding frame designed for easy replacement of the filter cartridge, the cartridge comprising:
- a) four side walls forming a rectangular box with an open front face and open rear face;
- b) filtration media disposed within said box, the filter media being sealed with respect to the side walls to assure that air passing through the cartridge is filtered by said filter media;
- and
- c) flanges connected to the rear face of the box and extending outwardly of the side walls to provide a surface to seal against the filter holding frame, the flanges including cut-outs to cooperate with side spacers on the inside wall of the holding frame to allow the cartridge to slide into the holding frame.
A filtration cartridge for use in a filter holding frame designed for easy replacement of the filter cartridge, the cartridge comprising:
- a) four side walls forming a rectangular box with an open front face and open rear face wherein the outside of at least one side wall includes outwardly extending projections to space the cartridge from the frame;
- b) filtration media disposed within said box, the filter media being sealed with respect to the side walls to assure that air passing through the cartridge is filtered by said filter media;
- and
- c) flanges connected to the rear face of the box and extending outwardly of the side walls to provide a surface to seal against the filter holding frame.
Dependencies are inferred from the claim text.