Filter for internal combustion engine fuels

US6709588B2 · kind B2 · utility

Assignee

• Filterwerk Mann & Hummel GmbH · DE

Inventors

• Jaroslav Pavlin · Freiberg, DE
• Herbert Jainek · Heilbronn, DE

Key dates

• Filing date: Jan 22, 2002
• Grant date: Mar 23, 2004
• Expiry date: Jan 22, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M37/54
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter for filtering liquids, especially fuel, which includes a concentric housing, an unfiltered liquid inlet, and filtered fluid outlet, and a backflow member. A concentric filter element, with a dirt collecting chamber in the lowermost part thereof, is disposed in the housing, which is closed with a cover. The housing also contains a riser pipe having a return bore hole in the uppermost part thereof, as well as a return pipe. An intermediate pipe, which is sealingly closed by the cover, is disposed above the riser pipe, and the filter element is removably attached to the intermediate pipe.