Cylindrical filter cartridge with support tube
AssigneeFilterwerk Mann & Hummel GmbH
InventorsRenate Gottwald-Grill, Helmut Luka
Life of this patent
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Abstract
A filter cartridge comprising an annularly closed filter medium provided with end disks (16). Within the interior of the cartridge there is a support tube (24), which is made in one piece and has a radial sealing ring (25) in its interior. The outside diameter of the support tube is chosen such that the support tube can be inserted into the filter cartridge. This produces a sealing effect between the end disks (16) and the outer circumference of the support tube. The filter cartridge of the invention has the advantage of being cost-effective to produce and simple to assemble.
Claims8
A filter cartridge having an annularly closed filter medium having end faces provided with end disks to form a seal and which has a support tube provided with inlet openings and having end areas connected to the end disks so as to form a seal, wherein the seal is formed with a radial expansion of the end disks, wherein, in at least one of the end areas of the support tube, a sealing ring is arranged with at least one sealing surface directed radially toward the interior of the support tube, wherein the support tube is constructed as one piece and at least one end area of the support tube is firmly connected to the adjoining end disk of the filter cartridge, wherein the sealing ring in the end area of the support tube does not touch the end disk which contacts this same end area;
- wherein said one end area of the support tube is provided with axially extending tongues which are separated by slots and are at least partially molded into the adjoining end disk, and wherein the adjoining end disk is made of an elastic material.
Dependencies are inferred from the claim text.