Liquid filter, especially oil filter

US6833066B2 · kind B2 · utility

Assignee

• Mahle Filtersysteme GmbH · DE

Inventors

• Peter G. Baumann · Stuttgart, DE
• Thomas Brieden · Waiblingen, DE
• Hans Gebert · Sankt Augustin, DE
• Markus Layer · Bad Marienberg, DE

Key dates

• Filing date: Sep 13, 2002
• Grant date: Dec 21, 2004
• Expiry date: Sep 30, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01M2011/033
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a liquid filter, for example an oil filter for cleaning lubricating oil, especially for use in internal combustion engines of motor vehicles. A ring-shaped filter insert separates an unclean side from a clean side in the interior of the liquid filter. A metal filter housing comprises a first flange with which the liquid filter can be screwed to a component via a screw connection, said component having an inlet for uncleaned liquid, an outlet for cleaned liquid and a relatively pressureless idle duct. The first flange contains an axially acting outer seal that includes inlet, outlet and idle duct, and a carrier receiving compartment encircled by the outer seal. A functional carrier insert is inserted in the carrier receiving compartment and is provided with an inlet compartment open towards the inlet, an outlet compartment open towards the outlet, and a idle duct compartment open towards the idle duct, the individual compartments being sealed from one another by axially acting inner seals. The screw connection with which the first flange is screwed to the component acts in the axial direction and axially forces the axially acting seals against the component,…