Enlarged opening filter bags, support assemblies, and filter bag assemblies
AssigneeDonaldson Company, Inc.
InventorsDavid V. Gutman, Massimo Movia, Eric W. E. Collin, Steven A. Johnson, Benny J. B. Mombaerts, Gabriel J. Safarian, David L. Van Eylen, Iman Vezvaei
Life of this patent
Estimating the term…
Abstract
Filter bags, filter bag support assemblies, and filter bag assemblies are described herein. The filter bags, filter bag support assemblies, and filter bag assemblies may be used in air filter systems to remove particulate matter from air or other gases. Methods of using the air filter systems and methods of assembling the filter bag assemblies are also described.
Claims20
A filter bag comprising a tubular body formed of filter media configured to remove particulate matter from air passing through the filter media, the tubular body extending from a closed end to a bag opening along a bag axis coincident with a central axis of the tubular body, wherein a sealing cuff extends around a perimeter of the bag opening, and wherein a reference bag length measured along the bag axis between a reference plane oriented perpendicular to the bag axis and the bag opening changes when moving around the perimeter of the bag opening.
A filter bag assembly comprising:
- a flange assembly comprising an interior face and a tubesheet face, the flange assembly comprising a clean air outlet extending through the flange assembly;
- a cage comprising a first cage end attached to the flange assembly, the cage extending away from the interior face of the flange assembly over a cage length to a second cage end distal from the base, the cage defining a cage axis extending between the first cage end and the second cage end;
- and
- a filter bag comprising a tubular body formed of filter media configured to remove particulate matter from air passing through the filter media, the tubular body extending from a closed end to a bag opening along a bag axis coincident with a central axis of the tubular body, wherein the cage is contained within the tubular body of the filter bag, wherein a sealing cuff extends around a perimeter of the bag opening;
- wherein the flange assembly comprises a base and a clamp configured to attach to the base on the interior face of the flange assembly,
- wherein the clean air outlet is defined by a base aperture formed in the base and by a clamp aperture formed in the clamp,
- wherein the base comprises a bag seal surface surrounding the base aperture and the clamp comprises a clamp seal surface surrounding the clamp aperture, wherein the sealing cuff is located between the bag seal surface and that clamp seal surface when the clamp is attached to the base,
- and wherein the base comprises a tubesheet face facing away from the second end of the cage, wherein the tubesheet face comprises a tubesheet face aperture defining a portion of the clean air outlet, and wherein tubesheet face comprises a tubesheet seal surface surrounding the tubesheet face aperture, wherein a distance between the bag seal surface and the tubesheet seal surface in a direction aligned with the cage axis changes when moving around a perimeter of the base aperture.
Dependencies are inferred from the claim text.