Filter arrangement for filtering liquids

US8715493B2 · kind B2 · utility

Assignee

• MANN+HUMMEL GmbH · DE

Inventors

• Daniel Volkmer · Hemmingen, DE
• Norbert Straβenberger · Adlkofen, DE

Key dates

• Filing date: Apr 20, 2011
• Grant date: May 6, 2014
• Expiry date: Oct 2, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2201/316
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter arrangement for filtering liquids has a central tube and a first filter element flowed through in radial direction outwardly and disposed on the central tube. A downstream second filter element is disposed on the central tube and flowed through in radial direction inwardly. The first filter element is moveable along the central tube from a basic position into an extended position. In the basic position a connection between the inlet line and a clean side of the first filter element is provided by the first filter element. In the extended position a bypass between an inlet line and the clean side of the first filter element is provided to bypass the first filter element. A spring element, applying a restoring force in a direction of extension of the central tube, is arranged on the first filter element at a side facing away from the second filter element.