Patent ID: 8758468
Filing Date: 2014-06-24
Classification: B01D

Abstract:
1. A filter for use in a baghouse for filtering at least some particulate material from fluid, the filter to be supported by a tubesheet separating dirty fluid and clean fluid chambers of the baghouse, the filter including: a filtration bag having an open end adjacent to the tubesheet and an encircling sidewall extending from the open end to a distal end along a direction of a central axis of the filtration bag, the bag sidewall permitting passage of fluid there through so that the fluid may pass from the dirty fluid chamber to the clean fluid chamber and blocking passage of at least some particulate material against proceeding to the clean fluid chamber; and a cage located within the filtration bag, the cage having structure to permit expansion of the cage to increase a cage diameter that forces the bag sidewall taut against the cage; wherein the shape of the cage is a general cylindrical shape, the increase in cage diameter is an increase in cage cylindrical diameter, and the cage has a side that extends in a helix with one portion located radially inward of another portion.