Back to results
US 4,290,889 AGranted
Support for backflushable filter media
AssigneeBrunswick Corporation
InventorArnold R. Erickson
Life of this patent
Estimating the term…
Abstract
This invention comprehends a new and unique means for preventing the crowns of a backflushable filter element unit from splitting which has heretofore been caused by the cyclic action of the cleaning and backflushing. A layer of staple material is positioned adjacent the outer layer of filter media to prevent bellowing or ballooning. An additional staple layer may be positioned adjacent the inner layer of filtered media to provide additional support. With both staple layers in position on both sides of the filter media, the media is firmly captured and the crowns will not split.
Claims21
A fluid filter comprising:
- (a) a pair of spaced end caps;
- (b) a pleated filter material extending between the end caps and secured thereto, the media having inner and outer pleated surface, the outer pleats having outwardly projecting crowns, the media having a pore size of X and a density of Y;
- and,
- (c) anti-bellowing means mounted between the outer media pleats for preventing the diaphragmic movement of the filter pleats when fluid is forced through the media in cyclic fashion, the anti-bellowing means comprising a plurality of metal staples in a three-dimensional, randomly oriented array forming a layer, the layer having a density less than Y and a pore size greater than X whereby the primary function of the layer is not that of a filter media.
1 more element
Dependencies are inferred from the claim text.