Filter structure

US6641636B2 · kind B2 · utility

Assignee

• Filterwerk Mann & Hummel GmbH · DE

Inventors

• Michael Willig · Ludwigsburg, DE
• Stefan Rumpp

Key dates

• Filing date: Jun 22, 2001
• Grant date: Nov 4, 2003
• Expiry date: Jun 22, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S55/30
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter unit for a motor vehicle which combines an intake air filter for an internal combustion engine and an interior ventilation air filter for a passenger compartment in a single unit. Filter housings for the respective filters may be joined to each other by a releasable connection, such as a combination of attachment hooks and screw fasteners, or they may be formed integrally with each other in one piece.