Fuel filter

US7731845B2 · kind B2 · utility

Assignee

• MANN+HUMMEL GmbH · DE

Inventors

• Johannes Lampert · Landshut, DE
• André Rösgen · Winnenden, DE

Key dates

• Filing date: Oct 27, 2007
• Grant date: Jun 8, 2010
• Expiry date: May 4, 2028

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B3/06
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A fuel filter has a filter housing and an annular filter element arranged in the filter housing. Between the bottom of the filter housing and the bottom area of the filter element a water collecting chamber is formed. The filter element has a coalescing element and a particle filter element. Fuel flows radially from the interior to the exterior of the coalescing element and from the exterior to the interior of the particle filter element. A riser tube extends through the clean chamber and the raw chamber from the bottom of the filter housing to the top. The riser tube has a clean channel and a guide channel. A seal on the riser tube separates a clean chamber from a raw chamber of the filter. A water removal tube is arranged inside the guide channel for removing water from the water collecting chamber.