Filter element having a nonwoven layer and a permeable shrink tube
AssigneeFilterwerk Mann & Hummel GmbH
InventorsHans Erdmannsdoerfer, Bruno Sommer
Life of this patent
Estimating the term…
Abstract
A filter element having a first tube 2 and a second tube 3, the outer circumferential surface of the first tube 2 being surrounded by a nonwoven layer 4, and the second tube 3 surrounding the first tube 2. On the outer periphery of the second tube 3 there is a yarn and/or paper winding 5, and a shrink tube 6 presses the yarn and/or paper winding 5 against the second tube.
Claims9
A filter element comprising a first permeable tube, a nonwoven layer supported on the outer periphery of said first permeable tube, a second permeable tube surrounding said first tube and nonwoven layer, a winding supported on the outer periphery of said second tube, said winding comprising at least one winding structure selected from the group consisting of (1) a yarn winding and (2) at least two layers of filter paper, and a permeable shrink tube surrounding said winding and holding said winding on said second tube;
- wherein the nonwoven layer has a greater axial length than the first permeable tube and is axially compressed when the filter element is installed in a filter.
Dependencies are inferred from the claim text.