Columbus Industries, Inc.

Other

Lennox Industries Inc.

Russell L Baldinger

Thaddeus J Ptak

Chrystal B Gillilan

Danny Lamer

Ammar Kailani

A collapsible HVAC filter that includes pleated filtration media having side members mounted on opposite sides of the filtration media. The filtration media collapses to reduce filter volume. Supports maintain spacing between the side members when the filtration media is expanded. The supports may extend into openings on the upstream and downstream sides of each of the side members. The collapsed filter occupies little space relative to the expanded filter, and can be expanded to form a completed filter with little effort required by the end user.

Collapsible pleated filter using laterally positioned retaining members

A filter contains fluent particulate, such as carbon granules. The filter is divided into a plurality of cell chambers by walls, including an upper wall. The upper wall has a surface that faces, and is closest to, the top surface of the particles. The upper wall surface is oriented so that, as the particles settle, any gap formed between the top surface of the particles and a portion of the upper wall surface will not extend from the upstream to the downstream sides of the filter. Instead, contact is maintained between the top surface of the particles and the upper wall surface during fluid flow through the filter, and therefore any gas flowing through the frame must flow through, and through spaces around, particles. An angle between the upper wall surface and the flow direction of gas striking the filter is greater than about three degrees.

Apparatus and method for avoiding fluid bypass in particulate filters

A filter media and a pleated filter with a first layer of filtration media, a layer of support material and a second layer of filtration media on the opposite side of the support material as the first layer of filter media. All three layers are laminated together and pleated. The support material provides the required stiffness and rigidity for the pleating process. The physical characteristics of the upstream layer of filtration media are contemplated to be different than the characteristics of the downstream layer of filtration media.

Multi layer pleatable filter medium

A composite filter media having excellent dust-releasing properties provided with a layer of netting formed of a low surface free energy material that is hot calendered to the upstream surface of a supporting layer formed of non-woven synthetic fibers. A filtering layer formed of non-woven synthetic fibers is laminated to the downstream surface of the supporting layer. The filtering layer may include an electrostatic charge to increase filter efficiency at a reduced pressure drop across the composite media.

Composite filter media

A frame for receiving a filter element includes: a pair of first members and a pair of second members. The first members may be arranged alternately with the second members in the assembled orientation to establish a plurality of joining structures between adjoining members. Each respective joining structure of the plurality of joining structures maintains the adjoining members oriented substantially about a respective axis. The first members and the second members cooperate to define a volume for effecting the receiving.

Frame for receiving a filter element and method for providing

An air filter including a plurality of air-pervious sheets of electret filtration material. The sheets are disposed in a parallel relationship to form a stack of sheets, and each of the sheets has a plurality of slits formed therein for subsequent expanding to form openings. The stack is connected together at opposing ends, such as by bonding. The sheets can be pleated by mounting in a frame. The frame has opposing ends to which the opposing ends of the stack are mounted. The filter media initially has no frame and is not pleated, but is in a flat pad form that is expanded to be installed into a frame. The frame is then mounted in an appliance, such as a room air filter. When the filter is inserted into the filter housing it is expanded and can take a pleated form.

Air filter formed by slit and expanded layers of electrostatically enhanced material

Air filter formed from slit and expanded layers of electrostatically enhanced material

A dual-stage vacuum cleaner filter with a pre-filtration cap having pre-filtering screens. A base with an aperture and a filter media strip pleated in the shape of a frustocone can be mounted within the dirt cup of a handheld vacuum. A circular, planar gas impermeable lid is sealingly fixed at the end of the filter media strip opposite the base. The cap is removably mounted to the base covering the filter media strip and lid. The cap has sidewall and endwall pre-filtering screens, and when the sidewall screens become loaded with debris, the endwall screen permits air to flow through a gap between the cap and the lid to the filter media strip.

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Circleville, OH, United States of America

Russell L Baldinger