Filter having an end flange with a downwardly-bent edge portion

Abstract

The invention relates to a spin-on filter (1) for filtering a flowing substance, especially a hydraulic liquid or lubricating oil in combustion motors. The filter (1) comprises a casing (7), open at one end, which is connected to a device assembly (6) including inlet and outlet ducts (4, 5) for the flow to be filtered, and a substantially cylindrical replaceable filter element (12) fitted inside the casing. The flow to be filtered passes through the filter element mantle, either radially-inwardly or radially outwardly. The cylindrical filter element (12) includes an end flange (16), designed such that its outer edge (17) simultaneously acts as a seal for the casing (7) end. The flange (16) can be made by injection-molding plastic in one piece and is equipped with flow openings (18) required for the flow to be filtered and communicating with the inlet or outlet ducts in the device assembly. The filter may include a joint ring (13), the end flange of the filter element forming a seal (17) between the casing and the joint ring. The filter also includes a collar (10) with a thread (2), by which the assembled filter can be connected as a unit to the device assembly (6) by screwing.

Dependencies are inferred from the claim text.